6:57 p.m.
Greeting,
FYI, we noticed a -12.3% regression of blogbench.write_score and a +9.6% improvement
of blogbench.read_score due to commit:
commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use sc->priority for slab
shrink targets")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: blogbench
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
with following parameters:
disk: 1SSD
fs: btrfs
cpufreq_governor: performance
test-description: Blogbench is a portable filesystem benchmark that tries to reproduce the
load of a real-world busy file server.
test-url: https://www.pureftpd.org/project/blogbench
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/rootfs/tbox_group/testcase:
gcc-7/performance/1SSD/btrfs/x86_64-rhel-7.2/debian-x86_64-2016-08-31.cgz/lkp-bdw-de1/blogbench
commit:
fcb2b0c577 ("mm: show total hugetlb memory consumption in /proc/meminfo")
9092c71bb7 ("mm: use sc->priority for slab shrink targets")
fcb2b0c577f145c7 9092c71bb724dba2ecba849eae
---------------- --------------------------
%stddev %change %stddev
\ | \
3256 -12.3% 2854 blogbench.write_score
1235237 ± 2% +9.6% 1354163 blogbench.read_score
28050912 -10.1% 25212230 blogbench.time.file_system_outputs
6481995 ± 3% +25.0% 8105320 ± 2% blogbench.time.involuntary_context_switches
906.00 +13.7% 1030 blogbench.time.percent_of_cpu_this_job_got
2552 +14.0% 2908 blogbench.time.system_time
173.80 +8.4% 188.32 blogbench.time.user_time
19353936 +3.6% 20045728 blogbench.time.voluntary_context_switches
8719514 +13.0% 9850451 softirqs.RCU
2.97 ± 5% -0.7 2.30 ± 3% mpstat.cpu.idle%
24.92 -6.5 18.46 mpstat.cpu.iowait%
0.65 ± 2% +0.1 0.75 mpstat.cpu.soft%
67.76 +6.7 74.45 mpstat.cpu.sys%
50206 -10.7% 44858 vmstat.io.bo
49.25 -9.1% 44.75 ± 2% vmstat.procs.b
224125 -1.8% 220135 vmstat.system.cs
48903 +10.7% 54134 vmstat.system.in
3460654 +10.8% 3834883 meminfo.Active
3380666 +11.0% 3752872 meminfo.Active(file)
1853849 -17.4% 1530415 meminfo.Inactive
1836507 -17.6% 1513054 meminfo.Inactive(file)
551311 -10.3% 494265 meminfo.SReclaimable
196525 -12.6% 171775 meminfo.SUnreclaim
747837 -10.9% 666040 meminfo.Slab
8.904e+08 -24.9% 6.683e+08 cpuidle.C1.time
22971020 -12.8% 20035820 cpuidle.C1.usage
2.518e+08 ± 3% -31.7% 1.72e+08 cpuidle.C1E.time
821393 ± 2% -33.3% 548003 cpuidle.C1E.usage
75460078 ± 2% -23.3% 57903768 ± 2% cpuidle.C3.time
136506 ± 3% -25.3% 101956 ± 3% cpuidle.C3.usage
56892498 ± 4% -23.3% 43608427 ± 4% cpuidle.C6.time
85034 ± 3% -33.9% 56184 ± 3% cpuidle.C6.usage
24373567 -24.5% 18395538 cpuidle.POLL.time
449033 ± 2% -10.8% 400493 cpuidle.POLL.usage
1832 +9.3% 2002 turbostat.Avg_MHz
22967645 -12.8% 20032521 turbostat.C1
18.43 -4.6 13.85 turbostat.C1%
821328 ± 2% -33.3% 547948 turbostat.C1E
5.21 ± 3% -1.6 3.56 turbostat.C1E%
136377 ± 3% -25.3% 101823 ± 3% turbostat.C3
1.56 ± 2% -0.4 1.20 ± 3% turbostat.C3%
84404 ± 3% -34.0% 55743 ± 3% turbostat.C6
1.17 ± 4% -0.3 0.90 ± 4% turbostat.C6%
25.93 -26.2% 19.14 turbostat.CPU%c1
0.12 ± 3% -19.1% 0.10 ± 9% turbostat.CPU%c3
14813304 +10.7% 16398388 turbostat.IRQ
38.19 +3.6% 39.56 turbostat.PkgWatt
4.51 +4.5% 4.71 turbostat.RAMWatt
8111200 ± 13% -63.2% 2986242 ± 48% proc-vmstat.compact_daemon_free_scanned
1026719 ± 30% -81.2% 193485 ± 30% proc-vmstat.compact_daemon_migrate_scanned
2444 ± 21% -63.3% 897.50 ± 20% proc-vmstat.compact_daemon_wake
8111200 ± 13% -63.2% 2986242 ± 48% proc-vmstat.compact_free_scanned
755491 ± 32% -81.6% 138856 ± 28% proc-vmstat.compact_isolated
1026719 ± 30% -81.2% 193485 ± 30% proc-vmstat.compact_migrate_scanned
137.75 ± 34% +2.8e+06% 3801062 ± 2% proc-vmstat.kswapd_inodesteal
6749 ± 20% -53.6% 3131 ± 12% proc-vmstat.kswapd_low_wmark_hit_quickly
844991 +11.2% 939487 proc-vmstat.nr_active_file
3900576 -10.5% 3490567 proc-vmstat.nr_dirtied
459789 -17.8% 377930 proc-vmstat.nr_inactive_file
137947 -10.3% 123720 proc-vmstat.nr_slab_reclaimable
49165 -12.6% 42989 proc-vmstat.nr_slab_unreclaimable
1382 ± 11% -26.2% 1020 ± 20% proc-vmstat.nr_writeback
3809266 -10.7% 3403350 proc-vmstat.nr_written
844489 +11.2% 938974 proc-vmstat.nr_zone_active_file
459855 -17.8% 378121 proc-vmstat.nr_zone_inactive_file
7055 ± 18% -52.0% 3389 ± 11% proc-vmstat.pageoutrun
33764911 ± 2% +21.3% 40946445 proc-vmstat.pgactivate
42044161 ± 2% +12.1% 47139065 proc-vmstat.pgdeactivate
92153 ± 20% -69.1% 28514 ± 24% proc-vmstat.pgmigrate_success
15212270 -10.7% 13591573 proc-vmstat.pgpgout
42053817 ± 2% +12.1% 47151755 proc-vmstat.pgrefill
11297 ±107% +1025.4% 127138 ± 21% proc-vmstat.pgscan_direct
19930162 -24.0% 15141439 proc-vmstat.pgscan_kswapd
19423629 -24.0% 14758807 proc-vmstat.pgsteal_kswapd
10868768 +184.8% 30950752 proc-vmstat.slabs_scanned
3361780 ± 3% -22.9% 2593327 ± 3% proc-vmstat.workingset_activate
4994722 ± 2% -43.2% 2835020 ± 2% proc-vmstat.workingset_refault
316427 -9.3% 286844 slabinfo.Acpi-Namespace.active_objs
3123 -9.4% 2829 slabinfo.Acpi-Namespace.active_slabs
318605 -9.4% 288623 slabinfo.Acpi-Namespace.num_objs
3123 -9.4% 2829 slabinfo.Acpi-Namespace.num_slabs
220514 -40.7% 130747 slabinfo.btrfs_delayed_node.active_objs
9751 -25.3% 7283 slabinfo.btrfs_delayed_node.active_slabs
263293 -25.3% 196669 slabinfo.btrfs_delayed_node.num_objs
9751 -25.3% 7283 slabinfo.btrfs_delayed_node.num_slabs
6383 ± 8% -12.0% 5615 ± 2% slabinfo.btrfs_delayed_ref_head.num_objs
9496 +15.5% 10969 slabinfo.btrfs_extent_buffer.active_objs
9980 +20.5% 12022 slabinfo.btrfs_extent_buffer.num_objs
260933 -10.7% 233136 slabinfo.btrfs_extent_map.active_objs
9392 -10.6% 8396 slabinfo.btrfs_extent_map.active_slabs
263009 -10.6% 235107 slabinfo.btrfs_extent_map.num_objs
9392 -10.6% 8396 slabinfo.btrfs_extent_map.num_slabs
271938 -10.3% 243802 slabinfo.btrfs_inode.active_objs
9804 -10.6% 8768 slabinfo.btrfs_inode.active_slabs
273856 -10.4% 245359 slabinfo.btrfs_inode.num_objs
9804 -10.6% 8768 slabinfo.btrfs_inode.num_slabs
7085 ± 5% -5.5% 6692 ± 2% slabinfo.btrfs_path.num_objs
311936 -16.4% 260797 slabinfo.dentry.active_objs
7803 -9.6% 7058 slabinfo.dentry.active_slabs
327759 -9.6% 296439 slabinfo.dentry.num_objs
7803 -9.6% 7058 slabinfo.dentry.num_slabs
2289 -23.3% 1755 ± 6% slabinfo.proc_inode_cache.active_objs
2292 -19.0% 1856 ± 6% slabinfo.proc_inode_cache.num_objs
261546 -12.3% 229485 slabinfo.radix_tree_node.active_objs
9404 -11.9% 8288 slabinfo.radix_tree_node.active_slabs
263347 -11.9% 232089 slabinfo.radix_tree_node.num_objs
9404 -11.9% 8288 slabinfo.radix_tree_node.num_slabs
1140424 ± 12% +40.2% 1598980 ± 14% sched_debug.cfs_rq:/.MIN_vruntime.max
790.55 +13.0% 893.20 ± 3% sched_debug.cfs_rq:/.exec_clock.stddev
1140425 ± 12% +40.2% 1598982 ± 14% sched_debug.cfs_rq:/.max_vruntime.max
0.83 ± 10% +21.5% 1.00 ± 8% sched_debug.cfs_rq:/.nr_running.avg
3.30 ± 99% +266.3% 12.09 ± 13% sched_debug.cfs_rq:/.removed.load_avg.avg
153.02 ± 97% +266.6% 560.96 ± 13%
sched_debug.cfs_rq:/.removed.runnable_sum.avg
569.93 ±102% +173.2% 1556 ± 14%
sched_debug.cfs_rq:/.removed.runnable_sum.stddev
1.42 ± 60% +501.5% 8.52 ± 34% sched_debug.cfs_rq:/.removed.util_avg.avg
19.88 ± 59% +288.9% 77.29 ± 16% sched_debug.cfs_rq:/.removed.util_avg.max
5.05 ± 58% +342.3% 22.32 ± 22%
sched_debug.cfs_rq:/.removed.util_avg.stddev
791.44 ± 3% +47.7% 1168 ± 8% sched_debug.cfs_rq:/.util_avg.avg
1305 ± 6% +33.2% 1738 ± 5% sched_debug.cfs_rq:/.util_avg.max
450.25 ± 11% +66.2% 748.17 ± 14% sched_debug.cfs_rq:/.util_avg.min
220.82 ± 8% +21.1% 267.46 ± 5% sched_debug.cfs_rq:/.util_avg.stddev
363118 ± 11% -23.8% 276520 ± 11% sched_debug.cpu.avg_idle.avg
726003 ± 8% -30.8% 502313 ± 4% sched_debug.cpu.avg_idle.max
202629 ± 3% -32.2% 137429 ± 18% sched_debug.cpu.avg_idle.stddev
31.96 ± 28% +54.6% 49.42 ± 14% sched_debug.cpu.cpu_load[3].min
36.21 ± 25% +64.0% 59.38 ± 6% sched_debug.cpu.cpu_load[4].min
1007 ± 5% +20.7% 1216 ± 7% sched_debug.cpu.curr->pid.avg
4.50 ± 5% +14.8% 5.17 ± 5% sched_debug.cpu.nr_running.max
2476195 -11.8% 2185022 sched_debug.cpu.nr_switches.max
212888 -26.6% 156172 ± 3% sched_debug.cpu.nr_switches.stddev
3570 ± 2% -58.7% 1474 ± 2% sched_debug.cpu.nr_uninterruptible.max
-803.67 -28.7% -573.38 sched_debug.cpu.nr_uninterruptible.min
1004 ± 2% -50.4% 498.55 ± 3% sched_debug.cpu.nr_uninterruptible.stddev
2478809 -11.7% 2189310 sched_debug.cpu.sched_count.max
214130 -26.5% 157298 ± 3% sched_debug.cpu.sched_count.stddev
489430 ± 2% -16.6% 408309 ± 2% sched_debug.cpu.sched_goidle.avg
724333 ± 2% -28.2% 520263 ± 2% sched_debug.cpu.sched_goidle.max
457611 -18.1% 374746 ± 3% sched_debug.cpu.sched_goidle.min
62957 ± 2% -47.4% 33138 ± 3% sched_debug.cpu.sched_goidle.stddev
676053 ± 2% -15.4% 571816 ± 2% sched_debug.cpu.ttwu_local.max
42669 ± 3% +22.3% 52198 sched_debug.cpu.ttwu_local.min
151873 ± 2% -18.3% 124118 ± 2% sched_debug.cpu.ttwu_local.stddev
blogbench.write_score
3300 +-+------------------------------------------------------------------+
3250 +-+ +. .+ +. .+ : : : +. .+ .+.+.+. .|
|: +. .+ +.+.+.+ + + + : +. : : +. + +.+ + + |
3200 +-+ + +.+ + : + + : + + |
3150 +-+.+ ++ +.+ |
3100 +-+ |
3050 +-+ |
| |
3000 +-+ |
2950 +-+ O O |
2900 +-O O O O |
2850 +-+ O O O O O O O OO O O O |
| O O O O |
2800 O-+ O O |
2750 +-+------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Xiaolong
12:30 a.m.
Hi, Josef,
Do you have time to take a look at the regression?
kernel test robot <xiaolong.ye(a)intel.com> writes:
Greeting,
FYI, we noticed a -12.3% regression of blogbench.write_score and a +9.6% improvement
of blogbench.read_score due to commit:
commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use sc->priority for slab
shrink targets")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: blogbench
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
with following parameters:
disk: 1SSD
fs: btrfs
cpufreq_governor: performance
test-description: Blogbench is a portable filesystem benchmark that tries to reproduce
the load of a real-world busy file server.
test-url: https://www.pureftpd.org/project/blogbench
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/rootfs/tbox_group/testcase:
gcc-7/performance/1SSD/btrfs/x86_64-rhel-7.2/debian-x86_64-2016-08-31.cgz/lkp-bdw-de1/blogbench
commit:
fcb2b0c577 ("mm: show total hugetlb memory consumption in /proc/meminfo")
9092c71bb7 ("mm: use sc->priority for slab shrink targets")
fcb2b0c577f145c7 9092c71bb724dba2ecba849eae
---------------- --------------------------
%stddev %change %stddev
\ | \
3256 -12.3% 2854 blogbench.write_score
1235237 2% +9.6% 1354163 blogbench.read_score
28050912 -10.1% 25212230 blogbench.time.file_system_outputs
6481995 3% +25.0% 8105320 2% blogbench.time.involuntary_context_switches
906.00 +13.7% 1030 blogbench.time.percent_of_cpu_this_job_got
2552 +14.0% 2908 blogbench.time.system_time
173.80 +8.4% 188.32 blogbench.time.user_time
19353936 +3.6% 20045728 blogbench.time.voluntary_context_switches
8719514 +13.0% 9850451 softirqs.RCU
2.97 5% -0.7 2.30 3% mpstat.cpu.idle%
24.92 -6.5 18.46 mpstat.cpu.iowait%
0.65 2% +0.1 0.75 mpstat.cpu.soft%
67.76 +6.7 74.45 mpstat.cpu.sys%
50206 -10.7% 44858 vmstat.io.bo
49.25 -9.1% 44.75 2% vmstat.procs.b
224125 -1.8% 220135 vmstat.system.cs
48903 +10.7% 54134 vmstat.system.in
3460654 +10.8% 3834883 meminfo.Active
3380666 +11.0% 3752872 meminfo.Active(file)
1853849 -17.4% 1530415 meminfo.Inactive
1836507 -17.6% 1513054 meminfo.Inactive(file)
551311 -10.3% 494265 meminfo.SReclaimable
196525 -12.6% 171775 meminfo.SUnreclaim
747837 -10.9% 666040 meminfo.Slab
8.904e+08 -24.9% 6.683e+08 cpuidle.C1.time
22971020 -12.8% 20035820 cpuidle.C1.usage
2.518e+08 3% -31.7% 1.72e+08 cpuidle.C1E.time
821393 2% -33.3% 548003 cpuidle.C1E.usage
75460078 2% -23.3% 57903768 2% cpuidle.C3.time
136506 3% -25.3% 101956 3% cpuidle.C3.usage
56892498 4% -23.3% 43608427 4% cpuidle.C6.time
85034 3% -33.9% 56184 3% cpuidle.C6.usage
24373567 -24.5% 18395538 cpuidle.POLL.time
449033 2% -10.8% 400493 cpuidle.POLL.usage
1832 +9.3% 2002 turbostat.Avg_MHz
22967645 -12.8% 20032521 turbostat.C1
18.43 -4.6 13.85 turbostat.C1%
821328 2% -33.3% 547948 turbostat.C1E
5.21 3% -1.6 3.56 turbostat.C1E%
136377 3% -25.3% 101823 3% turbostat.C3
1.56 2% -0.4 1.20 3% turbostat.C3%
84404 3% -34.0% 55743 3% turbostat.C6
1.17 4% -0.3 0.90 4% turbostat.C6%
25.93 -26.2% 19.14 turbostat.CPU%c1
0.12 3% -19.1% 0.10 9% turbostat.CPU%c3
14813304 +10.7% 16398388 turbostat.IRQ
38.19 +3.6% 39.56 turbostat.PkgWatt
4.51 +4.5% 4.71 turbostat.RAMWatt
8111200 13% -63.2% 2986242 48% proc-vmstat.compact_daemon_free_scanned
1026719 30% -81.2% 193485 30% proc-vmstat.compact_daemon_migrate_scanned
2444 21% -63.3% 897.50 20% proc-vmstat.compact_daemon_wake
8111200 13% -63.2% 2986242 48% proc-vmstat.compact_free_scanned
755491 32% -81.6% 138856 28% proc-vmstat.compact_isolated
1026719 30% -81.2% 193485 30% proc-vmstat.compact_migrate_scanned
137.75 34% +2.8e+06% 3801062 2% proc-vmstat.kswapd_inodesteal
6749 20% -53.6% 3131 12% proc-vmstat.kswapd_low_wmark_hit_quickly
844991 +11.2% 939487 proc-vmstat.nr_active_file
3900576 -10.5% 3490567 proc-vmstat.nr_dirtied
459789 -17.8% 377930 proc-vmstat.nr_inactive_file
137947 -10.3% 123720 proc-vmstat.nr_slab_reclaimable
49165 -12.6% 42989 proc-vmstat.nr_slab_unreclaimable
1382 11% -26.2% 1020 20% proc-vmstat.nr_writeback
3809266 -10.7% 3403350 proc-vmstat.nr_written
844489 +11.2% 938974 proc-vmstat.nr_zone_active_file
459855 -17.8% 378121 proc-vmstat.nr_zone_inactive_file
7055 18% -52.0% 3389 11% proc-vmstat.pageoutrun
33764911 2% +21.3% 40946445 proc-vmstat.pgactivate
42044161 2% +12.1% 47139065 proc-vmstat.pgdeactivate
92153 20% -69.1% 28514 24% proc-vmstat.pgmigrate_success
15212270 -10.7% 13591573 proc-vmstat.pgpgout
42053817 2% +12.1% 47151755 proc-vmstat.pgrefill
11297 107% +1025.4% 127138 21% proc-vmstat.pgscan_direct
19930162 -24.0% 15141439 proc-vmstat.pgscan_kswapd
19423629 -24.0% 14758807 proc-vmstat.pgsteal_kswapd
10868768 +184.8% 30950752 proc-vmstat.slabs_scanned
The slab scan number increased a lot.
3361780 3% -22.9% 2593327 3%
proc-vmstat.workingset_activate
4994722 2% -43.2% 2835020 2% proc-vmstat.workingset_refault
316427 -9.3% 286844 slabinfo.Acpi-Namespace.active_objs
3123 -9.4% 2829 slabinfo.Acpi-Namespace.active_slabs
318605 -9.4% 288623 slabinfo.Acpi-Namespace.num_objs
3123 -9.4% 2829 slabinfo.Acpi-Namespace.num_slabs
220514 -40.7% 130747 slabinfo.btrfs_delayed_node.active_objs
9751 -25.3% 7283 slabinfo.btrfs_delayed_node.active_slabs
263293 -25.3% 196669 slabinfo.btrfs_delayed_node.num_objs
9751 -25.3% 7283 slabinfo.btrfs_delayed_node.num_slabs
6383 8% -12.0% 5615 2% slabinfo.btrfs_delayed_ref_head.num_objs
9496 +15.5% 10969 slabinfo.btrfs_extent_buffer.active_objs
9980 +20.5% 12022 slabinfo.btrfs_extent_buffer.num_objs
260933 -10.7% 233136 slabinfo.btrfs_extent_map.active_objs
9392 -10.6% 8396 slabinfo.btrfs_extent_map.active_slabs
263009 -10.6% 235107 slabinfo.btrfs_extent_map.num_objs
9392 -10.6% 8396 slabinfo.btrfs_extent_map.num_slabs
271938 -10.3% 243802 slabinfo.btrfs_inode.active_objs
9804 -10.6% 8768 slabinfo.btrfs_inode.active_slabs
273856 -10.4% 245359 slabinfo.btrfs_inode.num_objs
9804 -10.6% 8768 slabinfo.btrfs_inode.num_slabs
7085 5% -5.5% 6692 2% slabinfo.btrfs_path.num_objs
311936 -16.4% 260797 slabinfo.dentry.active_objs
7803 -9.6% 7058 slabinfo.dentry.active_slabs
327759 -9.6% 296439 slabinfo.dentry.num_objs
7803 -9.6% 7058 slabinfo.dentry.num_slabs
2289 -23.3% 1755 6% slabinfo.proc_inode_cache.active_objs
2292 -19.0% 1856 6% slabinfo.proc_inode_cache.num_objs
261546 -12.3% 229485 slabinfo.radix_tree_node.active_objs
9404 -11.9% 8288 slabinfo.radix_tree_node.active_slabs
263347 -11.9% 232089 slabinfo.radix_tree_node.num_objs
9404 -11.9% 8288 slabinfo.radix_tree_node.num_slabs
The slab size decreased with the new commit.
From perf-profile result,
26.81 ± 2% -6.5 20.35 ± 2%
perf-profile.calltrace.cycles-pp.secondary_startup_64
24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.secondary_startup_64
24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.start_secondary.secondary_startup_64
22.80 ± 2% -5.5 17.30 ± 2%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
20.20 ± 2% -4.3 15.85
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
23.03 ± 2% -2.6 20.42
perf-profile.calltrace.cycles-pp.sys_rename.entry_SYSCALL_64_fastpath
17.02 ± 2% -1.8 15.17 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
17.03 ± 2% -1.8 15.19 ± 2%
perf-profile.calltrace.cycles-pp.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
13.70 ± 2% -1.2 12.47 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
5.06 ± 3% -1.1 3.96 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread.kthread
7.37 ± 4% -0.9 6.49 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
7.32 ± 4% -0.9 6.45 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node
1.54 ± 4% -0.7 0.81 ± 7%
perf-profile.calltrace.cycles-pp.poll_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_kernel.secondary_startup_64
2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.start_kernel.secondary_startup_64
2.23 ± 3% -0.7 1.53 ± 4%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
2.13 ± 2% -0.7 1.46 ± 4%
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel
5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
5.60 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.dput.sys_rename.entry_SYSCALL_64_fastpath
6.96 -0.7 6.31 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.evict.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
5.58 -0.6 4.94 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_evict_inode.evict.__dentry_kill.dput.sys_rename
6.94 ± 2% -0.6 6.30 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename
6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename
6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
3.38 ± 3% -0.5 2.84 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
3.40 ± 3% -0.5 2.86 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
7.30 ± 4% -0.4 6.86 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode
1.18 ± 4% -0.4 0.76 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
1.16 ± 4% -0.4 0.74 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode
5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename
1.16 ± 4% -0.4 0.74 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper
2.95 ± 3% -0.4 2.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root
2.95 ± 3% -0.4 2.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper
0.94 ± 2% -0.3 0.59 ± 4%
perf-profile.calltrace.cycles-pp.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd.kthread
1.25 -0.3 0.91 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node_memcg.shrink_node.kswapd.kthread.ret_from_fork
0.84 ± 2% -0.3 0.52 ± 3%
perf-profile.calltrace.cycles-pp.shrink_page_list.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd
1.01 -0.3 0.71 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_create.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
0.58 ± 4% -0.2 0.34 ± 70%
perf-profile.calltrace.cycles-pp.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
1.73 ± 2% -0.2 1.50 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref
1.67 ± 4% -0.2 1.44 ± 3%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
1.89 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill.dput
1.88 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill
1.90 -0.2 1.68 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill.dput
1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict
1.88 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill
1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill.dput
1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill
1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode
1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict
0.75 ± 11% -0.2 0.57 ± 7%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents
0.75 ± 11% -0.2 0.57 ± 7%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents.insert_reserved_file_extent
1.39 ± 3% -0.2 1.23 ± 4%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict
0.87 ± 5% -0.2 0.72 ± 5%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename
1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename
1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode
1.69 ± 2% -0.1 1.55 ± 2%
perf-profile.calltrace.cycles-pp.end_bio_extent_readpage.normal_work_helper.process_one_work.worker_thread.kthread
1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode
1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode
2.89 ± 3% -0.1 2.77 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del
1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode
0.94 -0.1 0.82
perf-profile.calltrace.cycles-pp.schedule_idle.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
0.93 -0.1 0.81
perf-profile.calltrace.cycles-pp.__schedule.schedule_idle.do_idle.cpu_startup_entry.start_secondary
1.52 -0.1 1.44 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode
0.71 ± 3% -0.1 0.66 ± 2%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items
0.60 ± 2% -0.0 0.56 ± 2%
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.wake_up_page_bit
1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.kswapd.kthread.ret_from_fork
1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node.kswapd.kthread.ret_from_fork
0.55 +0.1 0.68 ± 4%
perf-profile.calltrace.cycles-pp.find_get_entry.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read
0.57 +0.1 0.70 ± 4%
perf-profile.calltrace.cycles-pp.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read.sys_read
0.59 ± 3% +0.3 0.87
perf-profile.calltrace.cycles-pp.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate.try_to_wake_up
1.29 ± 3% +0.3 1.58
perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common
0.54 +0.3 0.83 ± 2%
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent
0.84 +0.3 1.18 ± 3%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node
0.71 ± 4% +0.3 1.05
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock
0.86 +0.4 1.21 ± 3%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
0.90 +0.4 1.28 ± 3%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
0.35 ± 71% +0.4 0.79 ± 3%
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode
0.98 ± 4% +0.4 1.41 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
0.98 ± 5% +0.4 1.43 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
0.94 ± 3% +0.4 1.39
perf-profile.calltrace.cycles-pp.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking
0.96 ± 3% +0.5 1.42
perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
1.05 ± 2% +0.5 1.52 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
1.06 ± 3% +0.5 1.53 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
0.97 ± 3% +0.5 1.45
perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
0.62 ± 4% +0.5 1.13
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot
0.65 ± 4% +0.5 1.19
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
0.17 ±141% +0.6 0.73
perf-profile.calltrace.cycles-pp.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate
0.00 +0.6 0.57 ± 2%
perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.00 +0.6 0.59 ± 2%
perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.00 +0.6 0.60 ± 2%
perf-profile.calltrace.cycles-pp.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.56 ± 4% +0.6 1.17
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent
1.17 +0.6 1.78 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
1.16 +0.6 1.77 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node
1.18 +0.6 1.80 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
0.57 ± 7% +0.6 1.21 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode
0.75 ± 4% +0.6 1.38
perf-profile.calltrace.cycles-pp.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
1.95 +0.7 2.61
perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read
1.96 +0.7 2.62
perf-profile.calltrace.cycles-pp.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read
0.00 +0.7 0.70
perf-profile.calltrace.cycles-pp.__save_stack_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair
2.10 +0.7 2.80
perf-profile.calltrace.cycles-pp.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read.sys_read
0.85 ± 5% +0.7 1.58
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
0.84 ± 6% +0.7 1.57
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
0.00 +0.8 0.75 ± 4%
perf-profile.calltrace.cycles-pp.super_cache_scan.shrink_slab.shrink_node.kswapd.kthread
0.00 +0.8 0.75 ± 5%
perf-profile.calltrace.cycles-pp.shrink_slab.shrink_node.kswapd.kthread.ret_from_fork
1.07 ± 5% +0.9 1.98 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
1.09 ± 7% +0.9 2.01 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
4.90 ± 2% +1.3 6.19
perf-profile.calltrace.cycles-pp.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read
4.90 ± 2% +1.3 6.20
perf-profile.calltrace.cycles-pp.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read.sys_read
4.44 ± 2% +1.3 5.74
perf-profile.calltrace.cycles-pp.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read
2.87 ± 3% +1.4 4.29
perf-profile.calltrace.cycles-pp.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter
2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages
2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages
2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat
2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup
2.72 ± 3% +1.4 4.17
perf-profile.calltrace.cycles-pp.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead
2.33 ± 4% +1.5 3.79
perf-profile.calltrace.cycles-pp.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead
2.38 +1.6 3.95
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
2.63 ± 6% +1.7 4.33
perf-profile.calltrace.cycles-pp.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
1.68 ± 4% +2.1 3.79
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
8.66 +2.2 10.90
perf-profile.calltrace.cycles-pp.generic_file_read_iter.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
8.71 +2.3 10.97
perf-profile.calltrace.cycles-pp.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
8.85 +2.3 11.15
perf-profile.calltrace.cycles-pp.vfs_read.sys_read.entry_SYSCALL_64_fastpath
9.02 +2.3 11.33
perf-profile.calltrace.cycles-pp.sys_read.entry_SYSCALL_64_fastpath
2.71 ± 3% +2.6 5.35
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
4.63 +2.7 7.29
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
4.65 +2.7 7.32
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
1.94 ± 2% +2.8 4.77
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
2.81 ± 4% +3.3 6.15
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
3.58 ± 2% +3.4 6.98
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
8.69 +6.3 15.03
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat
8.75 +6.4 15.12
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
47.34 +8.1 55.46
perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_fastpath
11.47 +8.1 19.60
perf-profile.calltrace.cycles-pp.btrfs_lookup.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
11.46 +8.1 19.59
perf-profile.calltrace.cycles-pp.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open.do_sys_open
13.90 +8.3 22.20
perf-profile.calltrace.cycles-pp.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
13.91 +8.3 22.22
perf-profile.calltrace.cycles-pp.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
14.13 +8.4 22.52
perf-profile.calltrace.cycles-pp.do_sys_open.entry_SYSCALL_64_fastpath
The cycles for dentry lookup increased much too. Is this the reason why
write score decreased?
If you need more information, please let me know.
Best Regards,
Huang, Ying
1140424 12% +40.2% 1598980 14%
sched_debug.cfs_rq:/.MIN_vruntime.max
790.55 +13.0% 893.20 3% sched_debug.cfs_rq:/.exec_clock.stddev
1140425 12% +40.2% 1598982 14% sched_debug.cfs_rq:/.max_vruntime.max
0.83 10% +21.5% 1.00 8% sched_debug.cfs_rq:/.nr_running.avg
3.30 99% +266.3% 12.09 13% sched_debug.cfs_rq:/.removed.load_avg.avg
153.02 97% +266.6% 560.96 13%
sched_debug.cfs_rq:/.removed.runnable_sum.avg
569.93 102% +173.2% 1556 14%
sched_debug.cfs_rq:/.removed.runnable_sum.stddev
1.42 60% +501.5% 8.52 34% sched_debug.cfs_rq:/.removed.util_avg.avg
19.88 59% +288.9% 77.29 16% sched_debug.cfs_rq:/.removed.util_avg.max
5.05 58% +342.3% 22.32 22% sched_debug.cfs_rq:/.removed.util_avg.stddev
791.44 3% +47.7% 1168 8% sched_debug.cfs_rq:/.util_avg.avg
1305 6% +33.2% 1738 5% sched_debug.cfs_rq:/.util_avg.max
450.25 11% +66.2% 748.17 14% sched_debug.cfs_rq:/.util_avg.min
220.82 8% +21.1% 267.46 5% sched_debug.cfs_rq:/.util_avg.stddev
363118 11% -23.8% 276520 11% sched_debug.cpu.avg_idle.avg
726003 8% -30.8% 502313 4% sched_debug.cpu.avg_idle.max
202629 3% -32.2% 137429 18% sched_debug.cpu.avg_idle.stddev
31.96 28% +54.6% 49.42 14% sched_debug.cpu.cpu_load[3].min
36.21 25% +64.0% 59.38 6% sched_debug.cpu.cpu_load[4].min
1007 5% +20.7% 1216 7% sched_debug.cpu.curr->pid.avg
4.50 5% +14.8% 5.17 5% sched_debug.cpu.nr_running.max
2476195 -11.8% 2185022 sched_debug.cpu.nr_switches.max
212888 -26.6% 156172 3% sched_debug.cpu.nr_switches.stddev
3570 2% -58.7% 1474 2% sched_debug.cpu.nr_uninterruptible.max
-803.67 -28.7% -573.38 sched_debug.cpu.nr_uninterruptible.min
1004 2% -50.4% 498.55 3% sched_debug.cpu.nr_uninterruptible.stddev
2478809 -11.7% 2189310 sched_debug.cpu.sched_count.max
214130 -26.5% 157298 3% sched_debug.cpu.sched_count.stddev
489430 2% -16.6% 408309 2% sched_debug.cpu.sched_goidle.avg
724333 2% -28.2% 520263 2% sched_debug.cpu.sched_goidle.max
457611 -18.1% 374746 3% sched_debug.cpu.sched_goidle.min
62957 2% -47.4% 33138 3% sched_debug.cpu.sched_goidle.stddev
676053 2% -15.4% 571816 2% sched_debug.cpu.ttwu_local.max
42669 3% +22.3% 52198 sched_debug.cpu.ttwu_local.min
151873 2% -18.3% 124118 2% sched_debug.cpu.ttwu_local.stddev
blogbench.write_score
3300 +-+------------------------------------------------------------------+
3250 +-+ +. .+ +. .+ : : : +. .+ .+.+.+. .|
|: +. .+ +.+.+.+ + + + : +. : : +. + +.+ + + |
3200 +-+ + +.+ + : + + : + + |
3150 +-+.+ ++ +.+ |
3100 +-+ |
3050 +-+ |
| |
3000 +-+ |
2950 +-+ O O |
2900 +-O O O O |
2850 +-+ O O O O O O O OO O O O |
| O O O O |
2800 O-+ O O |
2750 +-+------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Xiaolong
9:58 p.m.
Ping...
"Huang, Ying" <ying.huang(a)intel.com> writes:
Hi, Josef,
Do you have time to take a look at the regression?
kernel test robot <xiaolong.ye(a)intel.com> writes:
> Greeting,
>
> FYI, we noticed a -12.3% regression of blogbench.write_score and a +9.6% improvement
> of blogbench.read_score due to commit:
>
>
> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use sc->priority for
slab shrink targets")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> in testcase: blogbench
> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
> with following parameters:
>
> disk: 1SSD
> fs: btrfs
> cpufreq_governor: performance
>
> test-description: Blogbench is a portable filesystem benchmark that tries to
reproduce the load of a real-world busy file server.
> test-url: https://www.pureftpd.org/project/blogbench
>
>
>
> Details are as below:
>
-------------------------------------------------------------------------------------------------->
>
>
> To reproduce:
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> bin/lkp install job.yaml # job file is attached in this email
> bin/lkp run job.yaml
>
>
=========================================================================================
> compiler/cpufreq_governor/disk/fs/kconfig/rootfs/tbox_group/testcase:
>
gcc-7/performance/1SSD/btrfs/x86_64-rhel-7.2/debian-x86_64-2016-08-31.cgz/lkp-bdw-de1/blogbench
>
> commit:
> fcb2b0c577 ("mm: show total hugetlb memory consumption in
/proc/meminfo")
> 9092c71bb7 ("mm: use sc->priority for slab shrink targets")
>
> fcb2b0c577f145c7 9092c71bb724dba2ecba849eae
> ---------------- --------------------------
> %stddev %change %stddev
> \ | \
> 3256 -12.3% 2854 blogbench.write_score
> 1235237 2% +9.6% 1354163 blogbench.read_score
> 28050912 -10.1% 25212230 blogbench.time.file_system_outputs
> 6481995 3% +25.0% 8105320 2%
blogbench.time.involuntary_context_switches
> 906.00 +13.7% 1030
blogbench.time.percent_of_cpu_this_job_got
> 2552 +14.0% 2908 blogbench.time.system_time
> 173.80 +8.4% 188.32 blogbench.time.user_time
> 19353936 +3.6% 20045728
blogbench.time.voluntary_context_switches
> 8719514 +13.0% 9850451 softirqs.RCU
> 2.97 5% -0.7 2.30 3% mpstat.cpu.idle%
> 24.92 -6.5 18.46 mpstat.cpu.iowait%
> 0.65 2% +0.1 0.75 mpstat.cpu.soft%
> 67.76 +6.7 74.45 mpstat.cpu.sys%
> 50206 -10.7% 44858 vmstat.io.bo
> 49.25 -9.1% 44.75 2% vmstat.procs.b
> 224125 -1.8% 220135 vmstat.system.cs
> 48903 +10.7% 54134 vmstat.system.in
> 3460654 +10.8% 3834883 meminfo.Active
> 3380666 +11.0% 3752872 meminfo.Active(file)
> 1853849 -17.4% 1530415 meminfo.Inactive
> 1836507 -17.6% 1513054 meminfo.Inactive(file)
> 551311 -10.3% 494265 meminfo.SReclaimable
> 196525 -12.6% 171775 meminfo.SUnreclaim
> 747837 -10.9% 666040 meminfo.Slab
> 8.904e+08 -24.9% 6.683e+08 cpuidle.C1.time
> 22971020 -12.8% 20035820 cpuidle.C1.usage
> 2.518e+08 3% -31.7% 1.72e+08 cpuidle.C1E.time
> 821393 2% -33.3% 548003 cpuidle.C1E.usage
> 75460078 2% -23.3% 57903768 2% cpuidle.C3.time
> 136506 3% -25.3% 101956 3% cpuidle.C3.usage
> 56892498 4% -23.3% 43608427 4% cpuidle.C6.time
> 85034 3% -33.9% 56184 3% cpuidle.C6.usage
> 24373567 -24.5% 18395538 cpuidle.POLL.time
> 449033 2% -10.8% 400493 cpuidle.POLL.usage
> 1832 +9.3% 2002 turbostat.Avg_MHz
> 22967645 -12.8% 20032521 turbostat.C1
> 18.43 -4.6 13.85 turbostat.C1%
> 821328 2% -33.3% 547948 turbostat.C1E
> 5.21 3% -1.6 3.56 turbostat.C1E%
> 136377 3% -25.3% 101823 3% turbostat.C3
> 1.56 2% -0.4 1.20 3% turbostat.C3%
> 84404 3% -34.0% 55743 3% turbostat.C6
> 1.17 4% -0.3 0.90 4% turbostat.C6%
> 25.93 -26.2% 19.14 turbostat.CPU%c1
> 0.12 3% -19.1% 0.10 9% turbostat.CPU%c3
> 14813304 +10.7% 16398388 turbostat.IRQ
> 38.19 +3.6% 39.56 turbostat.PkgWatt
> 4.51 +4.5% 4.71 turbostat.RAMWatt
> 8111200 13% -63.2% 2986242 48% proc-vmstat.compact_daemon_free_scanned
> 1026719 30% -81.2% 193485 30%
proc-vmstat.compact_daemon_migrate_scanned
> 2444 21% -63.3% 897.50 20% proc-vmstat.compact_daemon_wake
> 8111200 13% -63.2% 2986242 48% proc-vmstat.compact_free_scanned
> 755491 32% -81.6% 138856 28% proc-vmstat.compact_isolated
> 1026719 30% -81.2% 193485 30% proc-vmstat.compact_migrate_scanned
> 137.75 34% +2.8e+06% 3801062 2% proc-vmstat.kswapd_inodesteal
> 6749 20% -53.6% 3131 12% proc-vmstat.kswapd_low_wmark_hit_quickly
> 844991 +11.2% 939487 proc-vmstat.nr_active_file
> 3900576 -10.5% 3490567 proc-vmstat.nr_dirtied
> 459789 -17.8% 377930 proc-vmstat.nr_inactive_file
> 137947 -10.3% 123720 proc-vmstat.nr_slab_reclaimable
> 49165 -12.6% 42989 proc-vmstat.nr_slab_unreclaimable
> 1382 11% -26.2% 1020 20% proc-vmstat.nr_writeback
> 3809266 -10.7% 3403350 proc-vmstat.nr_written
> 844489 +11.2% 938974 proc-vmstat.nr_zone_active_file
> 459855 -17.8% 378121 proc-vmstat.nr_zone_inactive_file
> 7055 18% -52.0% 3389 11% proc-vmstat.pageoutrun
> 33764911 2% +21.3% 40946445 proc-vmstat.pgactivate
> 42044161 2% +12.1% 47139065 proc-vmstat.pgdeactivate
> 92153 20% -69.1% 28514 24% proc-vmstat.pgmigrate_success
> 15212270 -10.7% 13591573 proc-vmstat.pgpgout
> 42053817 2% +12.1% 47151755 proc-vmstat.pgrefill
> 11297 107% +1025.4% 127138 21% proc-vmstat.pgscan_direct
> 19930162 -24.0% 15141439 proc-vmstat.pgscan_kswapd
> 19423629 -24.0% 14758807 proc-vmstat.pgsteal_kswapd
> 10868768 +184.8% 30950752 proc-vmstat.slabs_scanned
The slab scan number increased a lot.
> 3361780 3% -22.9% 2593327 3% proc-vmstat.workingset_activate
> 4994722 2% -43.2% 2835020 2% proc-vmstat.workingset_refault
> 316427 -9.3% 286844 slabinfo.Acpi-Namespace.active_objs
> 3123 -9.4% 2829 slabinfo.Acpi-Namespace.active_slabs
> 318605 -9.4% 288623 slabinfo.Acpi-Namespace.num_objs
> 3123 -9.4% 2829 slabinfo.Acpi-Namespace.num_slabs
> 220514 -40.7% 130747
slabinfo.btrfs_delayed_node.active_objs
> 9751 -25.3% 7283
slabinfo.btrfs_delayed_node.active_slabs
> 263293 -25.3% 196669 slabinfo.btrfs_delayed_node.num_objs
> 9751 -25.3% 7283 slabinfo.btrfs_delayed_node.num_slabs
> 6383 8% -12.0% 5615 2% slabinfo.btrfs_delayed_ref_head.num_objs
> 9496 +15.5% 10969
slabinfo.btrfs_extent_buffer.active_objs
> 9980 +20.5% 12022 slabinfo.btrfs_extent_buffer.num_objs
> 260933 -10.7% 233136 slabinfo.btrfs_extent_map.active_objs
> 9392 -10.6% 8396 slabinfo.btrfs_extent_map.active_slabs
> 263009 -10.6% 235107 slabinfo.btrfs_extent_map.num_objs
> 9392 -10.6% 8396 slabinfo.btrfs_extent_map.num_slabs
> 271938 -10.3% 243802 slabinfo.btrfs_inode.active_objs
> 9804 -10.6% 8768 slabinfo.btrfs_inode.active_slabs
> 273856 -10.4% 245359 slabinfo.btrfs_inode.num_objs
> 9804 -10.6% 8768 slabinfo.btrfs_inode.num_slabs
> 7085 5% -5.5% 6692 2% slabinfo.btrfs_path.num_objs
> 311936 -16.4% 260797 slabinfo.dentry.active_objs
> 7803 -9.6% 7058 slabinfo.dentry.active_slabs
> 327759 -9.6% 296439 slabinfo.dentry.num_objs
> 7803 -9.6% 7058 slabinfo.dentry.num_slabs
> 2289 -23.3% 1755 6% slabinfo.proc_inode_cache.active_objs
> 2292 -19.0% 1856 6% slabinfo.proc_inode_cache.num_objs
> 261546 -12.3% 229485 slabinfo.radix_tree_node.active_objs
> 9404 -11.9% 8288 slabinfo.radix_tree_node.active_slabs
> 263347 -11.9% 232089 slabinfo.radix_tree_node.num_objs
> 9404 -11.9% 8288 slabinfo.radix_tree_node.num_slabs
The slab size decreased with the new commit.
From perf-profile result,
26.81 ± 2% -6.5 20.35 ± 2%
perf-profile.calltrace.cycles-pp.secondary_startup_64
24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.secondary_startup_64
24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.start_secondary.secondary_startup_64
22.80 ± 2% -5.5 17.30 ± 2%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
20.20 ± 2% -4.3 15.85
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
23.03 ± 2% -2.6 20.42
perf-profile.calltrace.cycles-pp.sys_rename.entry_SYSCALL_64_fastpath
17.02 ± 2% -1.8 15.17 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
17.03 ± 2% -1.8 15.19 ± 2%
perf-profile.calltrace.cycles-pp.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
13.70 ± 2% -1.2 12.47 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
5.06 ± 3% -1.1 3.96 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread.kthread
7.37 ± 4% -0.9 6.49 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
7.32 ± 4% -0.9 6.45 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node
1.54 ± 4% -0.7 0.81 ± 7%
perf-profile.calltrace.cycles-pp.poll_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_kernel.secondary_startup_64
2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.start_kernel.secondary_startup_64
2.23 ± 3% -0.7 1.53 ± 4%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
2.13 ± 2% -0.7 1.46 ± 4%
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel
5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
5.60 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.dput.sys_rename.entry_SYSCALL_64_fastpath
6.96 -0.7 6.31 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.evict.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
5.58 -0.6 4.94 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_evict_inode.evict.__dentry_kill.dput.sys_rename
6.94 ± 2% -0.6 6.30 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename
6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename
6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
3.38 ± 3% -0.5 2.84 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
3.40 ± 3% -0.5 2.86 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
7.30 ± 4% -0.4 6.86 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode
1.18 ± 4% -0.4 0.76 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
1.16 ± 4% -0.4 0.74 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode
5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename
1.16 ± 4% -0.4 0.74 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper
2.95 ± 3% -0.4 2.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root
2.95 ± 3% -0.4 2.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper
0.94 ± 2% -0.3 0.59 ± 4%
perf-profile.calltrace.cycles-pp.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd.kthread
1.25 -0.3 0.91 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node_memcg.shrink_node.kswapd.kthread.ret_from_fork
0.84 ± 2% -0.3 0.52 ± 3%
perf-profile.calltrace.cycles-pp.shrink_page_list.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd
1.01 -0.3 0.71 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_create.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
0.58 ± 4% -0.2 0.34 ± 70%
perf-profile.calltrace.cycles-pp.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
1.73 ± 2% -0.2 1.50 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref
1.67 ± 4% -0.2 1.44 ± 3%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
1.89 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill.dput
1.88 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill
1.90 -0.2 1.68 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill.dput
1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict
1.88 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill
1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill.dput
1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill
1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode
1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict
0.75 ± 11% -0.2 0.57 ± 7%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents
0.75 ± 11% -0.2 0.57 ± 7%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents.insert_reserved_file_extent
1.39 ± 3% -0.2 1.23 ± 4%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict
0.87 ± 5% -0.2 0.72 ± 5%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename
1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename
1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode
1.69 ± 2% -0.1 1.55 ± 2%
perf-profile.calltrace.cycles-pp.end_bio_extent_readpage.normal_work_helper.process_one_work.worker_thread.kthread
1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode
1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode
2.89 ± 3% -0.1 2.77 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del
1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode
0.94 -0.1 0.82
perf-profile.calltrace.cycles-pp.schedule_idle.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
0.93 -0.1 0.81
perf-profile.calltrace.cycles-pp.__schedule.schedule_idle.do_idle.cpu_startup_entry.start_secondary
1.52 -0.1 1.44 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode
0.71 ± 3% -0.1 0.66 ± 2%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items
0.60 ± 2% -0.0 0.56 ± 2%
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.wake_up_page_bit
1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.kswapd.kthread.ret_from_fork
1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node.kswapd.kthread.ret_from_fork
0.55 +0.1 0.68 ± 4%
perf-profile.calltrace.cycles-pp.find_get_entry.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read
0.57 +0.1 0.70 ± 4%
perf-profile.calltrace.cycles-pp.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read.sys_read
0.59 ± 3% +0.3 0.87
perf-profile.calltrace.cycles-pp.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate.try_to_wake_up
1.29 ± 3% +0.3 1.58
perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common
0.54 +0.3 0.83 ± 2%
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent
0.84 +0.3 1.18 ± 3%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node
0.71 ± 4% +0.3 1.05
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock
0.86 +0.4 1.21 ± 3%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
0.90 +0.4 1.28 ± 3%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
0.35 ± 71% +0.4 0.79 ± 3%
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode
0.98 ± 4% +0.4 1.41 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
0.98 ± 5% +0.4 1.43 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
0.94 ± 3% +0.4 1.39
perf-profile.calltrace.cycles-pp.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking
0.96 ± 3% +0.5 1.42
perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
1.05 ± 2% +0.5 1.52 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
1.06 ± 3% +0.5 1.53 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
0.97 ± 3% +0.5 1.45
perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
0.62 ± 4% +0.5 1.13
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot
0.65 ± 4% +0.5 1.19
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
0.17 ±141% +0.6 0.73
perf-profile.calltrace.cycles-pp.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate
0.00 +0.6 0.57 ± 2%
perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.00 +0.6 0.59 ± 2%
perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.00 +0.6 0.60 ± 2%
perf-profile.calltrace.cycles-pp.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.56 ± 4% +0.6 1.17
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent
1.17 +0.6 1.78 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
1.16 +0.6 1.77 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node
1.18 +0.6 1.80 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
0.57 ± 7% +0.6 1.21 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode
0.75 ± 4% +0.6 1.38
perf-profile.calltrace.cycles-pp.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
1.95 +0.7 2.61
perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read
1.96 +0.7 2.62
perf-profile.calltrace.cycles-pp.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read
0.00 +0.7 0.70
perf-profile.calltrace.cycles-pp.__save_stack_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair
2.10 +0.7 2.80
perf-profile.calltrace.cycles-pp.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read.sys_read
0.85 ± 5% +0.7 1.58
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
0.84 ± 6% +0.7 1.57
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
0.00 +0.8 0.75 ± 4%
perf-profile.calltrace.cycles-pp.super_cache_scan.shrink_slab.shrink_node.kswapd.kthread
0.00 +0.8 0.75 ± 5%
perf-profile.calltrace.cycles-pp.shrink_slab.shrink_node.kswapd.kthread.ret_from_fork
1.07 ± 5% +0.9 1.98 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
1.09 ± 7% +0.9 2.01 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
4.90 ± 2% +1.3 6.19
perf-profile.calltrace.cycles-pp.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read
4.90 ± 2% +1.3 6.20
perf-profile.calltrace.cycles-pp.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read.sys_read
4.44 ± 2% +1.3 5.74
perf-profile.calltrace.cycles-pp.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read
2.87 ± 3% +1.4 4.29
perf-profile.calltrace.cycles-pp.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter
2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages
2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages
2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat
2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup
2.72 ± 3% +1.4 4.17
perf-profile.calltrace.cycles-pp.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead
2.33 ± 4% +1.5 3.79
perf-profile.calltrace.cycles-pp.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead
2.38 +1.6 3.95
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
2.63 ± 6% +1.7 4.33
perf-profile.calltrace.cycles-pp.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
1.68 ± 4% +2.1 3.79
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
8.66 +2.2 10.90
perf-profile.calltrace.cycles-pp.generic_file_read_iter.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
8.71 +2.3 10.97
perf-profile.calltrace.cycles-pp.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
8.85 +2.3 11.15
perf-profile.calltrace.cycles-pp.vfs_read.sys_read.entry_SYSCALL_64_fastpath
9.02 +2.3 11.33
perf-profile.calltrace.cycles-pp.sys_read.entry_SYSCALL_64_fastpath
2.71 ± 3% +2.6 5.35
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
4.63 +2.7 7.29
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
4.65 +2.7 7.32
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
1.94 ± 2% +2.8 4.77
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
2.81 ± 4% +3.3 6.15
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
3.58 ± 2% +3.4 6.98
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
8.69 +6.3 15.03
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat
8.75 +6.4 15.12
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
47.34 +8.1 55.46
perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_fastpath
11.47 +8.1 19.60
perf-profile.calltrace.cycles-pp.btrfs_lookup.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
11.46 +8.1 19.59
perf-profile.calltrace.cycles-pp.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open.do_sys_open
13.90 +8.3 22.20
perf-profile.calltrace.cycles-pp.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
13.91 +8.3 22.22
perf-profile.calltrace.cycles-pp.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
14.13 +8.4 22.52
perf-profile.calltrace.cycles-pp.do_sys_open.entry_SYSCALL_64_fastpath
The cycles for dentry lookup increased much too. Is this the reason why
write score decreased?
If you need more information, please let me know.
Best Regards,
Huang, Ying
> 1140424 12% +40.2% 1598980 14% sched_debug.cfs_rq:/.MIN_vruntime.max
> 790.55 +13.0% 893.20 3% sched_debug.cfs_rq:/.exec_clock.stddev
> 1140425 12% +40.2% 1598982 14% sched_debug.cfs_rq:/.max_vruntime.max
> 0.83 10% +21.5% 1.00 8% sched_debug.cfs_rq:/.nr_running.avg
> 3.30 99% +266.3% 12.09 13%
sched_debug.cfs_rq:/.removed.load_avg.avg
> 153.02 97% +266.6% 560.96 13%
sched_debug.cfs_rq:/.removed.runnable_sum.avg
> 569.93 102% +173.2% 1556 14%
sched_debug.cfs_rq:/.removed.runnable_sum.stddev
> 1.42 60% +501.5% 8.52 34%
sched_debug.cfs_rq:/.removed.util_avg.avg
> 19.88 59% +288.9% 77.29 16%
sched_debug.cfs_rq:/.removed.util_avg.max
> 5.05 58% +342.3% 22.32 22%
sched_debug.cfs_rq:/.removed.util_avg.stddev
> 791.44 3% +47.7% 1168 8% sched_debug.cfs_rq:/.util_avg.avg
> 1305 6% +33.2% 1738 5% sched_debug.cfs_rq:/.util_avg.max
> 450.25 11% +66.2% 748.17 14% sched_debug.cfs_rq:/.util_avg.min
> 220.82 8% +21.1% 267.46 5% sched_debug.cfs_rq:/.util_avg.stddev
> 363118 11% -23.8% 276520 11% sched_debug.cpu.avg_idle.avg
> 726003 8% -30.8% 502313 4% sched_debug.cpu.avg_idle.max
> 202629 3% -32.2% 137429 18% sched_debug.cpu.avg_idle.stddev
> 31.96 28% +54.6% 49.42 14% sched_debug.cpu.cpu_load[3].min
> 36.21 25% +64.0% 59.38 6% sched_debug.cpu.cpu_load[4].min
> 1007 5% +20.7% 1216 7% sched_debug.cpu.curr->pid.avg
> 4.50 5% +14.8% 5.17 5% sched_debug.cpu.nr_running.max
> 2476195 -11.8% 2185022 sched_debug.cpu.nr_switches.max
> 212888 -26.6% 156172 3% sched_debug.cpu.nr_switches.stddev
> 3570 2% -58.7% 1474 2% sched_debug.cpu.nr_uninterruptible.max
> -803.67 -28.7% -573.38 sched_debug.cpu.nr_uninterruptible.min
> 1004 2% -50.4% 498.55 3%
sched_debug.cpu.nr_uninterruptible.stddev
> 2478809 -11.7% 2189310 sched_debug.cpu.sched_count.max
> 214130 -26.5% 157298 3% sched_debug.cpu.sched_count.stddev
> 489430 2% -16.6% 408309 2% sched_debug.cpu.sched_goidle.avg
> 724333 2% -28.2% 520263 2% sched_debug.cpu.sched_goidle.max
> 457611 -18.1% 374746 3% sched_debug.cpu.sched_goidle.min
> 62957 2% -47.4% 33138 3% sched_debug.cpu.sched_goidle.stddev
> 676053 2% -15.4% 571816 2% sched_debug.cpu.ttwu_local.max
> 42669 3% +22.3% 52198 sched_debug.cpu.ttwu_local.min
> 151873 2% -18.3% 124118 2% sched_debug.cpu.ttwu_local.stddev
>
>
>
> blogbench.write_score
>
> 3300 +-+------------------------------------------------------------------+
> 3250 +-+ +. .+ +. .+ : : : +. .+ .+.+.+. .|
> |: +. .+ +.+.+.+ + + + : +. : : +. + +.+ + + |
> 3200 +-+ + +.+ + : + + : + + |
> 3150 +-+.+ ++ +.+ |
> 3100 +-+ |
> 3050 +-+ |
> | |
> 3000 +-+ |
> 2950 +-+ O O |
> 2900 +-O O O O |
> 2850 +-+ O O O O O O O OO O O O |
> | O O O O |
> 2800 O-+ O O |
> 2750 +-+------------------------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
>
>
> Disclaimer:
> Results have been estimated based on internal Intel analysis and are provided
> for informational purposes only. Any difference in system hardware or software
> design or configuration may affect actual performance.
>
>
> Thanks,
> Xiaolong
_______________________________________________
LKP mailing list
LKP(a)lists.01.org
https://lists.01.org/mailman/listinfo/lkp
6:37 p.m.
Ping again ...
"Huang, Ying" <ying.huang(a)intel.com> writes:
Ping...
"Huang, Ying" <ying.huang(a)intel.com> writes:
> Hi, Josef,
>
> Do you have time to take a look at the regression?
>
> kernel test robot <xiaolong.ye(a)intel.com> writes:
>
>> Greeting,
>>
>> FYI, we noticed a -12.3% regression of blogbench.write_score and a +9.6%
improvement
>> of blogbench.read_score due to commit:
>>
>>
>> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use sc->priority
for slab shrink targets")
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>
>> in testcase: blogbench
>> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
>> with following parameters:
>>
>> disk: 1SSD
>> fs: btrfs
>> cpufreq_governor: performance
>>
>> test-description: Blogbench is a portable filesystem benchmark that tries to
reproduce the load of a real-world busy file server.
>> test-url: https://www.pureftpd.org/project/blogbench
>>
>>
>>
>> Details are as below:
>>
-------------------------------------------------------------------------------------------------->
>>
>>
>> To reproduce:
>>
>> git clone https://github.com/intel/lkp-tests.git
>> cd lkp-tests
>> bin/lkp install job.yaml # job file is attached in this email
>> bin/lkp run job.yaml
>>
>>
=========================================================================================
>> compiler/cpufreq_governor/disk/fs/kconfig/rootfs/tbox_group/testcase:
>>
gcc-7/performance/1SSD/btrfs/x86_64-rhel-7.2/debian-x86_64-2016-08-31.cgz/lkp-bdw-de1/blogbench
>>
>> commit:
>> fcb2b0c577 ("mm: show total hugetlb memory consumption in
/proc/meminfo")
>> 9092c71bb7 ("mm: use sc->priority for slab shrink targets")
>>
>> fcb2b0c577f145c7 9092c71bb724dba2ecba849eae
>> ---------------- --------------------------
>> %stddev %change %stddev
>> \ | \
>> 3256 -12.3% 2854 blogbench.write_score
>> 1235237 2% +9.6% 1354163 blogbench.read_score
>> 28050912 -10.1% 25212230 blogbench.time.file_system_outputs
>> 6481995 3% +25.0% 8105320 2%
blogbench.time.involuntary_context_switches
>> 906.00 +13.7% 1030
blogbench.time.percent_of_cpu_this_job_got
>> 2552 +14.0% 2908 blogbench.time.system_time
>> 173.80 +8.4% 188.32 blogbench.time.user_time
>> 19353936 +3.6% 20045728
blogbench.time.voluntary_context_switches
>> 8719514 +13.0% 9850451 softirqs.RCU
>> 2.97 5% -0.7 2.30 3% mpstat.cpu.idle%
>> 24.92 -6.5 18.46 mpstat.cpu.iowait%
>> 0.65 2% +0.1 0.75 mpstat.cpu.soft%
>> 67.76 +6.7 74.45 mpstat.cpu.sys%
>> 50206 -10.7% 44858 vmstat.io.bo
>> 49.25 -9.1% 44.75 2% vmstat.procs.b
>> 224125 -1.8% 220135 vmstat.system.cs
>> 48903 +10.7% 54134 vmstat.system.in
>> 3460654 +10.8% 3834883 meminfo.Active
>> 3380666 +11.0% 3752872 meminfo.Active(file)
>> 1853849 -17.4% 1530415 meminfo.Inactive
>> 1836507 -17.6% 1513054 meminfo.Inactive(file)
>> 551311 -10.3% 494265 meminfo.SReclaimable
>> 196525 -12.6% 171775 meminfo.SUnreclaim
>> 747837 -10.9% 666040 meminfo.Slab
>> 8.904e+08 -24.9% 6.683e+08 cpuidle.C1.time
>> 22971020 -12.8% 20035820 cpuidle.C1.usage
>> 2.518e+08 3% -31.7% 1.72e+08 cpuidle.C1E.time
>> 821393 2% -33.3% 548003 cpuidle.C1E.usage
>> 75460078 2% -23.3% 57903768 2% cpuidle.C3.time
>> 136506 3% -25.3% 101956 3% cpuidle.C3.usage
>> 56892498 4% -23.3% 43608427 4% cpuidle.C6.time
>> 85034 3% -33.9% 56184 3% cpuidle.C6.usage
>> 24373567 -24.5% 18395538 cpuidle.POLL.time
>> 449033 2% -10.8% 400493 cpuidle.POLL.usage
>> 1832 +9.3% 2002 turbostat.Avg_MHz
>> 22967645 -12.8% 20032521 turbostat.C1
>> 18.43 -4.6 13.85 turbostat.C1%
>> 821328 2% -33.3% 547948 turbostat.C1E
>> 5.21 3% -1.6 3.56 turbostat.C1E%
>> 136377 3% -25.3% 101823 3% turbostat.C3
>> 1.56 2% -0.4 1.20 3% turbostat.C3%
>> 84404 3% -34.0% 55743 3% turbostat.C6
>> 1.17 4% -0.3 0.90 4% turbostat.C6%
>> 25.93 -26.2% 19.14 turbostat.CPU%c1
>> 0.12 3% -19.1% 0.10 9% turbostat.CPU%c3
>> 14813304 +10.7% 16398388 turbostat.IRQ
>> 38.19 +3.6% 39.56 turbostat.PkgWatt
>> 4.51 +4.5% 4.71 turbostat.RAMWatt
>> 8111200 13% -63.2% 2986242 48%
proc-vmstat.compact_daemon_free_scanned
>> 1026719 30% -81.2% 193485 30%
proc-vmstat.compact_daemon_migrate_scanned
>> 2444 21% -63.3% 897.50 20% proc-vmstat.compact_daemon_wake
>> 8111200 13% -63.2% 2986242 48% proc-vmstat.compact_free_scanned
>> 755491 32% -81.6% 138856 28% proc-vmstat.compact_isolated
>> 1026719 30% -81.2% 193485 30% proc-vmstat.compact_migrate_scanned
>> 137.75 34% +2.8e+06% 3801062 2% proc-vmstat.kswapd_inodesteal
>> 6749 20% -53.6% 3131 12%
proc-vmstat.kswapd_low_wmark_hit_quickly
>> 844991 +11.2% 939487 proc-vmstat.nr_active_file
>> 3900576 -10.5% 3490567 proc-vmstat.nr_dirtied
>> 459789 -17.8% 377930 proc-vmstat.nr_inactive_file
>> 137947 -10.3% 123720 proc-vmstat.nr_slab_reclaimable
>> 49165 -12.6% 42989 proc-vmstat.nr_slab_unreclaimable
>> 1382 11% -26.2% 1020 20% proc-vmstat.nr_writeback
>> 3809266 -10.7% 3403350 proc-vmstat.nr_written
>> 844489 +11.2% 938974 proc-vmstat.nr_zone_active_file
>> 459855 -17.8% 378121 proc-vmstat.nr_zone_inactive_file
>> 7055 18% -52.0% 3389 11% proc-vmstat.pageoutrun
>> 33764911 2% +21.3% 40946445 proc-vmstat.pgactivate
>> 42044161 2% +12.1% 47139065 proc-vmstat.pgdeactivate
>> 92153 20% -69.1% 28514 24% proc-vmstat.pgmigrate_success
>> 15212270 -10.7% 13591573 proc-vmstat.pgpgout
>> 42053817 2% +12.1% 47151755 proc-vmstat.pgrefill
>> 11297 107% +1025.4% 127138 21% proc-vmstat.pgscan_direct
>> 19930162 -24.0% 15141439 proc-vmstat.pgscan_kswapd
>> 19423629 -24.0% 14758807 proc-vmstat.pgsteal_kswapd
>> 10868768 +184.8% 30950752 proc-vmstat.slabs_scanned
>
> The slab scan number increased a lot.
>
>> 3361780 3% -22.9% 2593327 3% proc-vmstat.workingset_activate
>> 4994722 2% -43.2% 2835020 2% proc-vmstat.workingset_refault
>> 316427 -9.3% 286844
slabinfo.Acpi-Namespace.active_objs
>> 3123 -9.4% 2829
slabinfo.Acpi-Namespace.active_slabs
>> 318605 -9.4% 288623 slabinfo.Acpi-Namespace.num_objs
>> 3123 -9.4% 2829 slabinfo.Acpi-Namespace.num_slabs
>> 220514 -40.7% 130747
slabinfo.btrfs_delayed_node.active_objs
>> 9751 -25.3% 7283
slabinfo.btrfs_delayed_node.active_slabs
>> 263293 -25.3% 196669
slabinfo.btrfs_delayed_node.num_objs
>> 9751 -25.3% 7283
slabinfo.btrfs_delayed_node.num_slabs
>> 6383 8% -12.0% 5615 2%
slabinfo.btrfs_delayed_ref_head.num_objs
>> 9496 +15.5% 10969
slabinfo.btrfs_extent_buffer.active_objs
>> 9980 +20.5% 12022
slabinfo.btrfs_extent_buffer.num_objs
>> 260933 -10.7% 233136
slabinfo.btrfs_extent_map.active_objs
>> 9392 -10.6% 8396
slabinfo.btrfs_extent_map.active_slabs
>> 263009 -10.6% 235107 slabinfo.btrfs_extent_map.num_objs
>> 9392 -10.6% 8396
slabinfo.btrfs_extent_map.num_slabs
>> 271938 -10.3% 243802 slabinfo.btrfs_inode.active_objs
>> 9804 -10.6% 8768 slabinfo.btrfs_inode.active_slabs
>> 273856 -10.4% 245359 slabinfo.btrfs_inode.num_objs
>> 9804 -10.6% 8768 slabinfo.btrfs_inode.num_slabs
>> 7085 5% -5.5% 6692 2% slabinfo.btrfs_path.num_objs
>> 311936 -16.4% 260797 slabinfo.dentry.active_objs
>> 7803 -9.6% 7058 slabinfo.dentry.active_slabs
>> 327759 -9.6% 296439 slabinfo.dentry.num_objs
>> 7803 -9.6% 7058 slabinfo.dentry.num_slabs
>> 2289 -23.3% 1755 6%
slabinfo.proc_inode_cache.active_objs
>> 2292 -19.0% 1856 6% slabinfo.proc_inode_cache.num_objs
>> 261546 -12.3% 229485
slabinfo.radix_tree_node.active_objs
>> 9404 -11.9% 8288
slabinfo.radix_tree_node.active_slabs
>> 263347 -11.9% 232089 slabinfo.radix_tree_node.num_objs
>> 9404 -11.9% 8288 slabinfo.radix_tree_node.num_slabs
>
> The slab size decreased with the new commit.
>
> From perf-profile result,
>
> 26.81 ± 2% -6.5 20.35 ± 2%
perf-profile.calltrace.cycles-pp.secondary_startup_64
> 24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
> 24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.secondary_startup_64
> 24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.start_secondary.secondary_startup_64
> 22.80 ± 2% -5.5 17.30 ± 2%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
> 20.20 ± 2% -4.3 15.85
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
> 23.03 ± 2% -2.6 20.42
perf-profile.calltrace.cycles-pp.sys_rename.entry_SYSCALL_64_fastpath
> 17.02 ± 2% -1.8 15.17 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
> 17.03 ± 2% -1.8 15.19 ± 2%
perf-profile.calltrace.cycles-pp.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
> 13.70 ± 2% -1.2 12.47 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
> 5.06 ± 3% -1.1 3.96 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread.kthread
> 7.37 ± 4% -0.9 6.49 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
> 7.32 ± 4% -0.9 6.45 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node
> 1.54 ± 4% -0.7 0.81 ± 7%
perf-profile.calltrace.cycles-pp.poll_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
> 2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
> 2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_kernel.secondary_startup_64
> 2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.start_kernel.secondary_startup_64
> 2.23 ± 3% -0.7 1.53 ± 4%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
> 2.13 ± 2% -0.7 1.46 ± 4%
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel
> 5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
> 5.60 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.dput.sys_rename.entry_SYSCALL_64_fastpath
> 6.96 -0.7 6.31 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
> 5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.evict.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
> 5.58 -0.6 4.94 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_evict_inode.evict.__dentry_kill.dput.sys_rename
> 6.94 ± 2% -0.6 6.30 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename
> 6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename
> 6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
> 3.38 ± 3% -0.5 2.84 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
> 3.40 ± 3% -0.5 2.86 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
> 7.30 ± 4% -0.4 6.86 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode
> 1.18 ± 4% -0.4 0.76 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
> 1.16 ± 4% -0.4 0.74 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
> 5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode
> 5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename
> 1.16 ± 4% -0.4 0.74 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper
> 2.95 ± 3% -0.4 2.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root
> 2.95 ± 3% -0.4 2.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper
> 0.94 ± 2% -0.3 0.59 ± 4%
perf-profile.calltrace.cycles-pp.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd.kthread
> 1.25 -0.3 0.91 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node_memcg.shrink_node.kswapd.kthread.ret_from_fork
> 0.84 ± 2% -0.3 0.52 ± 3%
perf-profile.calltrace.cycles-pp.shrink_page_list.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd
> 1.01 -0.3 0.71 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_create.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
> 0.58 ± 4% -0.2 0.34 ± 70%
perf-profile.calltrace.cycles-pp.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
> 1.73 ± 2% -0.2 1.50 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref
> 1.67 ± 4% -0.2 1.44 ± 3%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
> 1.89 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill.dput
> 1.88 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill
> 1.90 -0.2 1.68 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill.dput
> 1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict
> 1.88 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill
> 1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill.dput
> 1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill
> 1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode
> 1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict
> 0.75 ± 11% -0.2 0.57 ± 7%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents
> 0.75 ± 11% -0.2 0.57 ± 7%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents.insert_reserved_file_extent
> 1.39 ± 3% -0.2 1.23 ± 4%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
> 1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
> 1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
> 1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict
> 0.87 ± 5% -0.2 0.72 ± 5%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
> 1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename
> 1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename
> 1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode
> 1.69 ± 2% -0.1 1.55 ± 2%
perf-profile.calltrace.cycles-pp.end_bio_extent_readpage.normal_work_helper.process_one_work.worker_thread.kthread
> 1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode
> 1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode
> 2.89 ± 3% -0.1 2.77 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
> 1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del
> 1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode
> 0.94 -0.1 0.82
perf-profile.calltrace.cycles-pp.schedule_idle.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
> 0.93 -0.1 0.81
perf-profile.calltrace.cycles-pp.__schedule.schedule_idle.do_idle.cpu_startup_entry.start_secondary
> 1.52 -0.1 1.44 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode
> 0.71 ± 3% -0.1 0.66 ± 2%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items
> 0.60 ± 2% -0.0 0.56 ± 2%
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.wake_up_page_bit
> 1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.kswapd.kthread.ret_from_fork
> 1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node.kswapd.kthread.ret_from_fork
> 0.55 +0.1 0.68 ± 4%
perf-profile.calltrace.cycles-pp.find_get_entry.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read
> 0.57 +0.1 0.70 ± 4%
perf-profile.calltrace.cycles-pp.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read.sys_read
> 0.59 ± 3% +0.3 0.87
perf-profile.calltrace.cycles-pp.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate.try_to_wake_up
> 1.29 ± 3% +0.3 1.58
perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common
> 0.54 +0.3 0.83 ± 2%
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent
> 0.84 +0.3 1.18 ± 3%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node
> 0.71 ± 4% +0.3 1.05
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock
> 0.86 +0.4 1.21 ± 3%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
> 0.90 +0.4 1.28 ± 3%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
> 0.35 ± 71% +0.4 0.79 ± 3%
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode
> 0.98 ± 4% +0.4 1.41 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
> 0.98 ± 5% +0.4 1.43 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
> 0.94 ± 3% +0.4 1.39
perf-profile.calltrace.cycles-pp.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking
> 0.96 ± 3% +0.5 1.42
perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
> 1.05 ± 2% +0.5 1.52 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
> 1.06 ± 3% +0.5 1.53 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
> 0.97 ± 3% +0.5 1.45
perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
> 0.62 ± 4% +0.5 1.13
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot
> 0.65 ± 4% +0.5 1.19
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
> 0.17 ±141% +0.6 0.73
perf-profile.calltrace.cycles-pp.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate
> 0.00 +0.6 0.57 ± 2%
perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
> 0.00 +0.6 0.59 ± 2%
perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
> 0.00 +0.6 0.60 ± 2%
perf-profile.calltrace.cycles-pp.syscall_return_slowpath.entry_SYSCALL_64_fastpath
> 0.56 ± 4% +0.6 1.17
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent
> 1.17 +0.6 1.78 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
> 1.16 +0.6 1.77 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node
> 1.18 +0.6 1.80 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
> 0.57 ± 7% +0.6 1.21 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode
> 0.75 ± 4% +0.6 1.38
perf-profile.calltrace.cycles-pp.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
> 1.95 +0.7 2.61
perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read
> 1.96 +0.7 2.62
perf-profile.calltrace.cycles-pp.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read
> 0.00 +0.7 0.70
perf-profile.calltrace.cycles-pp.__save_stack_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair
> 2.10 +0.7 2.80
perf-profile.calltrace.cycles-pp.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read.sys_read
> 0.85 ± 5% +0.7 1.58
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
> 0.84 ± 6% +0.7 1.57
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
> 0.00 +0.8 0.75 ± 4%
perf-profile.calltrace.cycles-pp.super_cache_scan.shrink_slab.shrink_node.kswapd.kthread
> 0.00 +0.8 0.75 ± 5%
perf-profile.calltrace.cycles-pp.shrink_slab.shrink_node.kswapd.kthread.ret_from_fork
> 1.07 ± 5% +0.9 1.98 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
> 1.09 ± 7% +0.9 2.01 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
> 4.90 ± 2% +1.3 6.19
perf-profile.calltrace.cycles-pp.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read
> 4.90 ± 2% +1.3 6.20
perf-profile.calltrace.cycles-pp.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read.sys_read
> 4.44 ± 2% +1.3 5.74
perf-profile.calltrace.cycles-pp.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read
> 2.87 ± 3% +1.4 4.29
perf-profile.calltrace.cycles-pp.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter
> 2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages
> 2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages
> 2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat
> 2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup
> 2.72 ± 3% +1.4 4.17
perf-profile.calltrace.cycles-pp.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead
> 2.33 ± 4% +1.5 3.79
perf-profile.calltrace.cycles-pp.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead
> 2.38 +1.6 3.95
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
> 2.63 ± 6% +1.7 4.33
perf-profile.calltrace.cycles-pp.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
> 1.68 ± 4% +2.1 3.79
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
> 8.66 +2.2 10.90
perf-profile.calltrace.cycles-pp.generic_file_read_iter.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
> 8.71 +2.3 10.97
perf-profile.calltrace.cycles-pp.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
> 8.85 +2.3 11.15
perf-profile.calltrace.cycles-pp.vfs_read.sys_read.entry_SYSCALL_64_fastpath
> 9.02 +2.3 11.33
perf-profile.calltrace.cycles-pp.sys_read.entry_SYSCALL_64_fastpath
> 2.71 ± 3% +2.6 5.35
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
> 4.63 +2.7 7.29
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
> 4.65 +2.7 7.32
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
> 1.94 ± 2% +2.8 4.77
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
> 2.81 ± 4% +3.3 6.15
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
> 3.58 ± 2% +3.4 6.98
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
> 8.69 +6.3 15.03
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat
> 8.75 +6.4 15.12
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
> 47.34 +8.1 55.46
perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_fastpath
> 11.47 +8.1 19.60
perf-profile.calltrace.cycles-pp.btrfs_lookup.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
> 11.46 +8.1 19.59
perf-profile.calltrace.cycles-pp.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open.do_sys_open
> 13.90 +8.3 22.20
perf-profile.calltrace.cycles-pp.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
> 13.91 +8.3 22.22
perf-profile.calltrace.cycles-pp.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
> 14.13 +8.4 22.52
perf-profile.calltrace.cycles-pp.do_sys_open.entry_SYSCALL_64_fastpath
>
> The cycles for dentry lookup increased much too. Is this the reason why
> write score decreased?
>
> If you need more information, please let me know.
>
> Best Regards,
> Huang, Ying
>
>> 1140424 12% +40.2% 1598980 14%
sched_debug.cfs_rq:/.MIN_vruntime.max
>> 790.55 +13.0% 893.20 3%
sched_debug.cfs_rq:/.exec_clock.stddev
>> 1140425 12% +40.2% 1598982 14%
sched_debug.cfs_rq:/.max_vruntime.max
>> 0.83 10% +21.5% 1.00 8% sched_debug.cfs_rq:/.nr_running.avg
>> 3.30 99% +266.3% 12.09 13%
sched_debug.cfs_rq:/.removed.load_avg.avg
>> 153.02 97% +266.6% 560.96 13%
sched_debug.cfs_rq:/.removed.runnable_sum.avg
>> 569.93 102% +173.2% 1556 14%
sched_debug.cfs_rq:/.removed.runnable_sum.stddev
>> 1.42 60% +501.5% 8.52 34%
sched_debug.cfs_rq:/.removed.util_avg.avg
>> 19.88 59% +288.9% 77.29 16%
sched_debug.cfs_rq:/.removed.util_avg.max
>> 5.05 58% +342.3% 22.32 22%
sched_debug.cfs_rq:/.removed.util_avg.stddev
>> 791.44 3% +47.7% 1168 8% sched_debug.cfs_rq:/.util_avg.avg
>> 1305 6% +33.2% 1738 5% sched_debug.cfs_rq:/.util_avg.max
>> 450.25 11% +66.2% 748.17 14% sched_debug.cfs_rq:/.util_avg.min
>> 220.82 8% +21.1% 267.46 5% sched_debug.cfs_rq:/.util_avg.stddev
>> 363118 11% -23.8% 276520 11% sched_debug.cpu.avg_idle.avg
>> 726003 8% -30.8% 502313 4% sched_debug.cpu.avg_idle.max
>> 202629 3% -32.2% 137429 18% sched_debug.cpu.avg_idle.stddev
>> 31.96 28% +54.6% 49.42 14% sched_debug.cpu.cpu_load[3].min
>> 36.21 25% +64.0% 59.38 6% sched_debug.cpu.cpu_load[4].min
>> 1007 5% +20.7% 1216 7% sched_debug.cpu.curr->pid.avg
>> 4.50 5% +14.8% 5.17 5% sched_debug.cpu.nr_running.max
>> 2476195 -11.8% 2185022 sched_debug.cpu.nr_switches.max
>> 212888 -26.6% 156172 3% sched_debug.cpu.nr_switches.stddev
>> 3570 2% -58.7% 1474 2%
sched_debug.cpu.nr_uninterruptible.max
>> -803.67 -28.7% -573.38
sched_debug.cpu.nr_uninterruptible.min
>> 1004 2% -50.4% 498.55 3%
sched_debug.cpu.nr_uninterruptible.stddev
>> 2478809 -11.7% 2189310 sched_debug.cpu.sched_count.max
>> 214130 -26.5% 157298 3% sched_debug.cpu.sched_count.stddev
>> 489430 2% -16.6% 408309 2% sched_debug.cpu.sched_goidle.avg
>> 724333 2% -28.2% 520263 2% sched_debug.cpu.sched_goidle.max
>> 457611 -18.1% 374746 3% sched_debug.cpu.sched_goidle.min
>> 62957 2% -47.4% 33138 3% sched_debug.cpu.sched_goidle.stddev
>> 676053 2% -15.4% 571816 2% sched_debug.cpu.ttwu_local.max
>> 42669 3% +22.3% 52198 sched_debug.cpu.ttwu_local.min
>> 151873 2% -18.3% 124118 2% sched_debug.cpu.ttwu_local.stddev
>>
>>
>>
>> blogbench.write_score
>>
>> 3300 +-+------------------------------------------------------------------+
>> 3250 +-+ +. .+ +. .+ : : : +. .+ .+.+.+. .|
>> |: +. .+ +.+.+.+ + + + : +. : : +. + +.+ + + |
>> 3200 +-+ + +.+ + : + + : + + |
>> 3150 +-+.+ ++ +.+ |
>> 3100 +-+ |
>> 3050 +-+ |
>> | |
>> 3000 +-+ |
>> 2950 +-+ O O |
>> 2900 +-O O O O |
>> 2850 +-+ O O O O O O O OO O O O |
>> | O O O O |
>> 2800 O-+ O O |
>> 2750 +-+------------------------------------------------------------------+
>>
>>
>> [*] bisect-good sample
>> [O] bisect-bad sample
>>
>>
>>
>> Disclaimer:
>> Results have been estimated based on internal Intel analysis and are provided
>> for informational purposes only. Any difference in system hardware or software
>> design or configuration may affect actual performance.
>>
>>
>> Thanks,
>> Xiaolong
> _______________________________________________
> LKP mailing list
> LKP(a)lists.01.org
> https://lists.01.org/mailman/listinfo/lkp
8:51 p.m.
Ping * 3
"Huang, Ying" <ying.huang(a)intel.com> writes:
Ping again ...
"Huang, Ying" <ying.huang(a)intel.com> writes:
> Ping...
>
> "Huang, Ying" <ying.huang(a)intel.com> writes:
>
>> Hi, Josef,
>>
>> Do you have time to take a look at the regression?
>>
>> kernel test robot <xiaolong.ye(a)intel.com> writes:
>>
>>> Greeting,
>>>
>>> FYI, we noticed a -12.3% regression of blogbench.write_score and a +9.6%
improvement
>>> of blogbench.read_score due to commit:
>>>
>>>
>>> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use
sc->priority for slab shrink targets")
>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>>
>>> in testcase: blogbench
>>> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G
memory
>>> with following parameters:
>>>
>>> disk: 1SSD
>>> fs: btrfs
>>> cpufreq_governor: performance
>>>
>>> test-description: Blogbench is a portable filesystem benchmark that tries to
reproduce the load of a real-world busy file server.
>>> test-url: https://www.pureftpd.org/project/blogbench
>>>
>>>
>>>
>>> Details are as below:
>>>
-------------------------------------------------------------------------------------------------->
>>>
>>>
>>> To reproduce:
>>>
>>> git clone https://github.com/intel/lkp-tests.git
>>> cd lkp-tests
>>> bin/lkp install job.yaml # job file is attached in this email
>>> bin/lkp run job.yaml
>>>
>>>
=========================================================================================
>>> compiler/cpufreq_governor/disk/fs/kconfig/rootfs/tbox_group/testcase:
>>>
gcc-7/performance/1SSD/btrfs/x86_64-rhel-7.2/debian-x86_64-2016-08-31.cgz/lkp-bdw-de1/blogbench
>>>
>>> commit:
>>> fcb2b0c577 ("mm: show total hugetlb memory consumption in
/proc/meminfo")
>>> 9092c71bb7 ("mm: use sc->priority for slab shrink targets")
>>>
>>> fcb2b0c577f145c7 9092c71bb724dba2ecba849eae
>>> ---------------- --------------------------
>>> %stddev %change %stddev
>>> \ | \
>>> 3256 -12.3% 2854 blogbench.write_score
>>> 1235237 2% +9.6% 1354163 blogbench.read_score
>>> 28050912 -10.1% 25212230
blogbench.time.file_system_outputs
>>> 6481995 3% +25.0% 8105320 2%
blogbench.time.involuntary_context_switches
>>> 906.00 +13.7% 1030
blogbench.time.percent_of_cpu_this_job_got
>>> 2552 +14.0% 2908 blogbench.time.system_time
>>> 173.80 +8.4% 188.32 blogbench.time.user_time
>>> 19353936 +3.6% 20045728
blogbench.time.voluntary_context_switches
>>> 8719514 +13.0% 9850451 softirqs.RCU
>>> 2.97 5% -0.7 2.30 3% mpstat.cpu.idle%
>>> 24.92 -6.5 18.46 mpstat.cpu.iowait%
>>> 0.65 2% +0.1 0.75 mpstat.cpu.soft%
>>> 67.76 +6.7 74.45 mpstat.cpu.sys%
>>> 50206 -10.7% 44858 vmstat.io.bo
>>> 49.25 -9.1% 44.75 2% vmstat.procs.b
>>> 224125 -1.8% 220135 vmstat.system.cs
>>> 48903 +10.7% 54134 vmstat.system.in
>>> 3460654 +10.8% 3834883 meminfo.Active
>>> 3380666 +11.0% 3752872 meminfo.Active(file)
>>> 1853849 -17.4% 1530415 meminfo.Inactive
>>> 1836507 -17.6% 1513054 meminfo.Inactive(file)
>>> 551311 -10.3% 494265 meminfo.SReclaimable
>>> 196525 -12.6% 171775 meminfo.SUnreclaim
>>> 747837 -10.9% 666040 meminfo.Slab
>>> 8.904e+08 -24.9% 6.683e+08 cpuidle.C1.time
>>> 22971020 -12.8% 20035820 cpuidle.C1.usage
>>> 2.518e+08 3% -31.7% 1.72e+08 cpuidle.C1E.time
>>> 821393 2% -33.3% 548003 cpuidle.C1E.usage
>>> 75460078 2% -23.3% 57903768 2% cpuidle.C3.time
>>> 136506 3% -25.3% 101956 3% cpuidle.C3.usage
>>> 56892498 4% -23.3% 43608427 4% cpuidle.C6.time
>>> 85034 3% -33.9% 56184 3% cpuidle.C6.usage
>>> 24373567 -24.5% 18395538 cpuidle.POLL.time
>>> 449033 2% -10.8% 400493 cpuidle.POLL.usage
>>> 1832 +9.3% 2002 turbostat.Avg_MHz
>>> 22967645 -12.8% 20032521 turbostat.C1
>>> 18.43 -4.6 13.85 turbostat.C1%
>>> 821328 2% -33.3% 547948 turbostat.C1E
>>> 5.21 3% -1.6 3.56 turbostat.C1E%
>>> 136377 3% -25.3% 101823 3% turbostat.C3
>>> 1.56 2% -0.4 1.20 3% turbostat.C3%
>>> 84404 3% -34.0% 55743 3% turbostat.C6
>>> 1.17 4% -0.3 0.90 4% turbostat.C6%
>>> 25.93 -26.2% 19.14 turbostat.CPU%c1
>>> 0.12 3% -19.1% 0.10 9% turbostat.CPU%c3
>>> 14813304 +10.7% 16398388 turbostat.IRQ
>>> 38.19 +3.6% 39.56 turbostat.PkgWatt
>>> 4.51 +4.5% 4.71 turbostat.RAMWatt
>>> 8111200 13% -63.2% 2986242 48%
proc-vmstat.compact_daemon_free_scanned
>>> 1026719 30% -81.2% 193485 30%
proc-vmstat.compact_daemon_migrate_scanned
>>> 2444 21% -63.3% 897.50 20% proc-vmstat.compact_daemon_wake
>>> 8111200 13% -63.2% 2986242 48% proc-vmstat.compact_free_scanned
>>> 755491 32% -81.6% 138856 28% proc-vmstat.compact_isolated
>>> 1026719 30% -81.2% 193485 30%
proc-vmstat.compact_migrate_scanned
>>> 137.75 34% +2.8e+06% 3801062 2% proc-vmstat.kswapd_inodesteal
>>> 6749 20% -53.6% 3131 12%
proc-vmstat.kswapd_low_wmark_hit_quickly
>>> 844991 +11.2% 939487 proc-vmstat.nr_active_file
>>> 3900576 -10.5% 3490567 proc-vmstat.nr_dirtied
>>> 459789 -17.8% 377930 proc-vmstat.nr_inactive_file
>>> 137947 -10.3% 123720
proc-vmstat.nr_slab_reclaimable
>>> 49165 -12.6% 42989
proc-vmstat.nr_slab_unreclaimable
>>> 1382 11% -26.2% 1020 20% proc-vmstat.nr_writeback
>>> 3809266 -10.7% 3403350 proc-vmstat.nr_written
>>> 844489 +11.2% 938974
proc-vmstat.nr_zone_active_file
>>> 459855 -17.8% 378121
proc-vmstat.nr_zone_inactive_file
>>> 7055 18% -52.0% 3389 11% proc-vmstat.pageoutrun
>>> 33764911 2% +21.3% 40946445 proc-vmstat.pgactivate
>>> 42044161 2% +12.1% 47139065 proc-vmstat.pgdeactivate
>>> 92153 20% -69.1% 28514 24% proc-vmstat.pgmigrate_success
>>> 15212270 -10.7% 13591573 proc-vmstat.pgpgout
>>> 42053817 2% +12.1% 47151755 proc-vmstat.pgrefill
>>> 11297 107% +1025.4% 127138 21% proc-vmstat.pgscan_direct
>>> 19930162 -24.0% 15141439 proc-vmstat.pgscan_kswapd
>>> 19423629 -24.0% 14758807 proc-vmstat.pgsteal_kswapd
>>> 10868768 +184.8% 30950752 proc-vmstat.slabs_scanned
>>
>> The slab scan number increased a lot.
>>
>>> 3361780 3% -22.9% 2593327 3% proc-vmstat.workingset_activate
>>> 4994722 2% -43.2% 2835020 2% proc-vmstat.workingset_refault
>>> 316427 -9.3% 286844
slabinfo.Acpi-Namespace.active_objs
>>> 3123 -9.4% 2829
slabinfo.Acpi-Namespace.active_slabs
>>> 318605 -9.4% 288623
slabinfo.Acpi-Namespace.num_objs
>>> 3123 -9.4% 2829
slabinfo.Acpi-Namespace.num_slabs
>>> 220514 -40.7% 130747
slabinfo.btrfs_delayed_node.active_objs
>>> 9751 -25.3% 7283
slabinfo.btrfs_delayed_node.active_slabs
>>> 263293 -25.3% 196669
slabinfo.btrfs_delayed_node.num_objs
>>> 9751 -25.3% 7283
slabinfo.btrfs_delayed_node.num_slabs
>>> 6383 8% -12.0% 5615 2%
slabinfo.btrfs_delayed_ref_head.num_objs
>>> 9496 +15.5% 10969
slabinfo.btrfs_extent_buffer.active_objs
>>> 9980 +20.5% 12022
slabinfo.btrfs_extent_buffer.num_objs
>>> 260933 -10.7% 233136
slabinfo.btrfs_extent_map.active_objs
>>> 9392 -10.6% 8396
slabinfo.btrfs_extent_map.active_slabs
>>> 263009 -10.6% 235107
slabinfo.btrfs_extent_map.num_objs
>>> 9392 -10.6% 8396
slabinfo.btrfs_extent_map.num_slabs
>>> 271938 -10.3% 243802
slabinfo.btrfs_inode.active_objs
>>> 9804 -10.6% 8768
slabinfo.btrfs_inode.active_slabs
>>> 273856 -10.4% 245359 slabinfo.btrfs_inode.num_objs
>>> 9804 -10.6% 8768 slabinfo.btrfs_inode.num_slabs
>>> 7085 5% -5.5% 6692 2% slabinfo.btrfs_path.num_objs
>>> 311936 -16.4% 260797 slabinfo.dentry.active_objs
>>> 7803 -9.6% 7058 slabinfo.dentry.active_slabs
>>> 327759 -9.6% 296439 slabinfo.dentry.num_objs
>>> 7803 -9.6% 7058 slabinfo.dentry.num_slabs
>>> 2289 -23.3% 1755 6%
slabinfo.proc_inode_cache.active_objs
>>> 2292 -19.0% 1856 6%
slabinfo.proc_inode_cache.num_objs
>>> 261546 -12.3% 229485
slabinfo.radix_tree_node.active_objs
>>> 9404 -11.9% 8288
slabinfo.radix_tree_node.active_slabs
>>> 263347 -11.9% 232089
slabinfo.radix_tree_node.num_objs
>>> 9404 -11.9% 8288
slabinfo.radix_tree_node.num_slabs
>>
>> The slab size decreased with the new commit.
>>
>> From perf-profile result,
>>
>> 26.81 ± 2% -6.5 20.35 ± 2%
perf-profile.calltrace.cycles-pp.secondary_startup_64
>> 24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
>> 24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.secondary_startup_64
>> 24.48 ± 2% -5.8 18.73
perf-profile.calltrace.cycles-pp.start_secondary.secondary_startup_64
>> 22.80 ± 2% -5.5 17.30 ± 2%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
>> 20.20 ± 2% -4.3 15.85
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
>> 23.03 ± 2% -2.6 20.42
perf-profile.calltrace.cycles-pp.sys_rename.entry_SYSCALL_64_fastpath
>> 17.02 ± 2% -1.8 15.17 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
>> 17.03 ± 2% -1.8 15.19 ± 2%
perf-profile.calltrace.cycles-pp.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
>> 13.70 ± 2% -1.2 12.47 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
>> 5.06 ± 3% -1.1 3.96 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread.kthread
>> 7.37 ± 4% -0.9 6.49 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
>> 7.32 ± 4% -0.9 6.45 ± 2%
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_lock.btrfs_lock_root_node
>> 1.54 ± 4% -0.7 0.81 ± 7%
perf-profile.calltrace.cycles-pp.poll_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_secondary
>> 2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
>> 2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_kernel.secondary_startup_64
>> 2.33 ± 2% -0.7 1.62 ± 4%
perf-profile.calltrace.cycles-pp.start_kernel.secondary_startup_64
>> 2.23 ± 3% -0.7 1.53 ± 4%
perf-profile.calltrace.cycles-pp.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel.secondary_startup_64
>> 2.13 ± 2% -0.7 1.46 ± 4%
perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.do_idle.cpu_startup_entry.start_kernel
>> 5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
>> 5.60 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.dput.sys_rename.entry_SYSCALL_64_fastpath
>> 6.96 -0.7 6.31 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
>> 5.59 -0.7 4.94 ± 3%
perf-profile.calltrace.cycles-pp.evict.__dentry_kill.dput.sys_rename.entry_SYSCALL_64_fastpath
>> 5.58 -0.6 4.94 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_evict_inode.evict.__dentry_kill.dput.sys_rename
>> 6.94 ± 2% -0.6 6.30 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename.vfs_rename
>> 6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename
>> 6.66 ± 4% -0.6 6.10 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
>> 3.38 ± 3% -0.5 2.84 ± 3%
>
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
>> 3.40 ± 3% -0.5 2.86 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
>> 7.30 ± 4% -0.4 6.86 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode
>> 1.18 ± 4% -0.4 0.76 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work.worker_thread
>> 1.16 ± 4% -0.4 0.74 ± 2%
>
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper.process_one_work
>> 5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode
>> 5.96 ± 2% -0.4 5.54 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref.__btrfs_unlink_inode.btrfs_rename
>> 1.16 ± 4% -0.4 0.74 ± 2%
>
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_async_run_delayed_root.normal_work_helper
>> 2.95 ± 3% -0.4 2.54 ± 3%
>
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root
>> 2.95 ± 3% -0.4 2.54 ± 3%
>
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items.btrfs_async_run_delayed_root.normal_work_helper
>> 0.94 ± 2% -0.3 0.59 ± 4%
perf-profile.calltrace.cycles-pp.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd.kthread
>> 1.25 -0.3 0.91 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node_memcg.shrink_node.kswapd.kthread.ret_from_fork
>> 0.84 ± 2% -0.3 0.52 ± 3%
perf-profile.calltrace.cycles-pp.shrink_page_list.shrink_inactive_list.shrink_node_memcg.shrink_node.kswapd
>> 1.01 -0.3 0.71 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_create.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
>> 0.58 ± 4% -0.2 0.34 ± 70%
perf-profile.calltrace.cycles-pp.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
>> 1.73 ± 2% -0.2 1.50 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_inode_ref
>> 1.67 ± 4% -0.2 1.44 ± 3%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
>> 1.89 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill.dput
>> 1.88 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict.__dentry_kill
>> 1.90 -0.2 1.68 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill.dput
>> 1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict
>> 1.88 -0.2 1.67 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict.__dentry_kill
>> 1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill.dput
>> 1.78 -0.2 1.57 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode.evict.__dentry_kill
>> 1.87 -0.2 1.66 ± 2%
>
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode
>> 1.87 -0.2 1.66 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode.btrfs_evict_inode.evict
>> 0.75 ± 11% -0.2 0.57 ± 7%
>
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents
>> 0.75 ± 11% -0.2 0.57 ± 7%
>
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.__btrfs_drop_extents.insert_reserved_file_extent
>> 1.39 ± 3% -0.2 1.23 ± 4%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
>> 1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename
>> 1.84 -0.2 1.68 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_unlink_inode.btrfs_rename.vfs_rename.sys_rename.entry_SYSCALL_64_fastpath
>> 1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode.evict
>> 0.87 ± 5% -0.2 0.72 ± 5%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_delete_delayed_items
>> 1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename
>> 1.81 -0.2 1.66 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode.btrfs_rename.vfs_rename
>> 1.62 -0.2 1.46 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items.btrfs_evict_inode
>> 1.69 ± 2% -0.1 1.55 ± 2%
perf-profile.calltrace.cycles-pp.end_bio_extent_readpage.normal_work_helper.process_one_work.worker_thread.kthread
>> 1.58 -0.1 1.44 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode
>> 1.58 -0.1 1.44 ± 2%
>
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.__btrfs_update_delayed_inode.btrfs_commit_inode_delayed_inode
>> 2.89 ± 3% -0.1 2.77 ± 2%
>
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_write_lock_slowpath.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot
>> 1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del
>> 1.51 -0.1 1.39 ± 5%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_del_orphan_item.btrfs_orphan_del.btrfs_evict_inode
>> 0.94 -0.1 0.82
perf-profile.calltrace.cycles-pp.schedule_idle.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
>> 0.93 -0.1 0.81
perf-profile.calltrace.cycles-pp.__schedule.schedule_idle.do_idle.cpu_startup_entry.start_secondary
>> 1.52 -0.1 1.44 ± 3%
perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.__btrfs_unlink_inode.btrfs_unlink_inode
>> 0.71 ± 3% -0.1 0.66 ± 2%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_truncate_inode_items
>> 0.60 ± 2% -0.0 0.56 ± 2%
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.wake_up_page_bit
>> 1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.kswapd.kthread.ret_from_fork
>> 1.61 ± 2% +0.1 1.67 ± 2%
perf-profile.calltrace.cycles-pp.shrink_node.kswapd.kthread.ret_from_fork
>> 0.55 +0.1 0.68 ± 4%
perf-profile.calltrace.cycles-pp.find_get_entry.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read
>> 0.57 +0.1 0.70 ± 4%
perf-profile.calltrace.cycles-pp.pagecache_get_page.generic_file_read_iter.__vfs_read.vfs_read.sys_read
>> 0.59 ± 3% +0.3 0.87
perf-profile.calltrace.cycles-pp.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate.try_to_wake_up
>> 1.29 ± 3% +0.3 1.58
perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common
>> 0.54 +0.3 0.83 ± 2%
>
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent
>> 0.84 +0.3 1.18 ± 3%
>
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node
>> 0.71 ± 4% +0.3 1.05
perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock
>> 0.86 +0.4 1.21 ± 3%
>
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
>> 0.90 +0.4 1.28 ± 3%
perf-profile.calltrace.cycles-pp.prepare_to_wait_event.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
>> 0.35 ± 71% +0.4 0.79 ± 3%
>
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode
>> 0.98 ± 4% +0.4 1.41 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
>> 0.98 ± 5% +0.4 1.43 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
>> 0.94 ± 3% +0.4 1.39
perf-profile.calltrace.cycles-pp.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking
>> 0.96 ± 3% +0.5 1.42
perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
>> 1.05 ± 2% +0.5 1.52 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
>> 1.06 ± 3% +0.5 1.53 ± 4%
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
>> 0.97 ± 3% +0.5 1.45
perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
>> 0.62 ± 4% +0.5 1.13
>
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot
>> 0.65 ± 4% +0.5 1.19
>
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
>> 0.17 ±141% +0.6 0.73
perf-profile.calltrace.cycles-pp.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate
>> 0.00 +0.6 0.57 ± 2%
perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
>> 0.00 +0.6 0.59 ± 2%
perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
>> 0.00 +0.6 0.60 ± 2%
perf-profile.calltrace.cycles-pp.syscall_return_slowpath.entry_SYSCALL_64_fastpath
>> 0.56 ± 4% +0.6 1.17
>
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent
>> 1.17 +0.6 1.78 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
>> 1.16 +0.6 1.77 ± 2%
>
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node
>> 1.18 +0.6 1.80 ± 2%
perf-profile.calltrace.cycles-pp.finish_wait.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
>> 0.57 ± 7% +0.6 1.21 ± 2%
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode
>> 0.75 ± 4% +0.6 1.38
>
perf-profile.calltrace.cycles-pp.btrfs_clear_lock_blocking_rw.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
>> 1.95 +0.7 2.61
perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read
>> 1.96 +0.7 2.62
perf-profile.calltrace.cycles-pp.copyout.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read
>> 0.00 +0.7 0.70
perf-profile.calltrace.cycles-pp.__save_stack_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair
>> 2.10 +0.7 2.80
perf-profile.calltrace.cycles-pp.copy_page_to_iter.generic_file_read_iter.__vfs_read.vfs_read.sys_read
>> 0.85 ± 5% +0.7 1.58
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent
>> 0.84 ± 6% +0.7 1.57
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget
>> 0.00 +0.8 0.75 ± 4%
perf-profile.calltrace.cycles-pp.super_cache_scan.shrink_slab.shrink_node.kswapd.kthread
>> 0.00 +0.8 0.75 ± 5%
perf-profile.calltrace.cycles-pp.shrink_slab.shrink_node.kswapd.kthread.ret_from_fork
>> 1.07 ± 5% +0.9 1.98 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage
>> 1.09 ± 7% +0.9 2.01 ± 2%
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry
>> 4.90 ± 2% +1.3 6.19
perf-profile.calltrace.cycles-pp.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read
>> 4.90 ± 2% +1.3 6.20
perf-profile.calltrace.cycles-pp.ondemand_readahead.generic_file_read_iter.__vfs_read.vfs_read.sys_read
>> 4.44 ± 2% +1.3 5.74
perf-profile.calltrace.cycles-pp.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter.__vfs_read
>> 2.87 ± 3% +1.4 4.29
perf-profile.calltrace.cycles-pp.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead.generic_file_read_iter
>> 2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages
>> 2.22 ± 4% +1.4 3.65
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.__do_readpage.__extent_readpages
>> 2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat
>> 2.27 ± 6% +1.4 3.72
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_inode.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup
>> 2.72 ± 3% +1.4 4.17
perf-profile.calltrace.cycles-pp.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead.ondemand_readahead
>> 2.33 ± 4% +1.5 3.79
perf-profile.calltrace.cycles-pp.btrfs_get_extent.__do_readpage.__extent_readpages.extent_readpages.__do_page_cache_readahead
>> 2.38 +1.6 3.95
>
perf-profile.calltrace.cycles-pp.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item
>> 2.63 ± 6% +1.7 4.33
perf-profile.calltrace.cycles-pp.btrfs_iget.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
>> 1.68 ± 4% +2.1 3.79
>
perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item
>> 8.66 +2.2 10.90
perf-profile.calltrace.cycles-pp.generic_file_read_iter.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
>> 8.71 +2.3 10.97
perf-profile.calltrace.cycles-pp.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
>> 8.85 +2.3 11.15
perf-profile.calltrace.cycles-pp.vfs_read.sys_read.entry_SYSCALL_64_fastpath
>> 9.02 +2.3 11.33
perf-profile.calltrace.cycles-pp.sys_read.entry_SYSCALL_64_fastpath
>> 2.71 ± 3% +2.6 5.35
perf-profile.calltrace.cycles-pp.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
>> 4.63 +2.7 7.29
perf-profile.calltrace.cycles-pp.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry
>> 4.65 +2.7 7.32
perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
>> 1.94 ± 2% +2.8 4.77
>
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath.queued_read_lock_slowpath.btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot
>> 2.81 ± 4% +3.3 6.15
>
perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.__wake_up_common_lock.btrfs_clear_path_blocking.btrfs_search_slot
>> 3.58 ± 2% +3.4 6.98
perf-profile.calltrace.cycles-pp.btrfs_clear_path_blocking.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup
>> 8.69 +6.3 15.03
perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat
>> 8.75 +6.4 15.12
perf-profile.calltrace.cycles-pp.btrfs_lookup_dir_item.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open
>> 47.34 +8.1 55.46
perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_fastpath
>> 11.47 +8.1 19.60
perf-profile.calltrace.cycles-pp.btrfs_lookup.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
>> 11.46 +8.1 19.59
perf-profile.calltrace.cycles-pp.btrfs_lookup_dentry.btrfs_lookup.path_openat.do_filp_open.do_sys_open
>> 13.90 +8.3 22.20
perf-profile.calltrace.cycles-pp.path_openat.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
>> 13.91 +8.3 22.22
perf-profile.calltrace.cycles-pp.do_filp_open.do_sys_open.entry_SYSCALL_64_fastpath
>> 14.13 +8.4 22.52
perf-profile.calltrace.cycles-pp.do_sys_open.entry_SYSCALL_64_fastpath
>>
>> The cycles for dentry lookup increased much too. Is this the reason why
>> write score decreased?
>>
>> If you need more information, please let me know.
>>
>> Best Regards,
>> Huang, Ying
>>
>>> 1140424 12% +40.2% 1598980 14%
sched_debug.cfs_rq:/.MIN_vruntime.max
>>> 790.55 +13.0% 893.20 3%
sched_debug.cfs_rq:/.exec_clock.stddev
>>> 1140425 12% +40.2% 1598982 14%
sched_debug.cfs_rq:/.max_vruntime.max
>>> 0.83 10% +21.5% 1.00 8%
sched_debug.cfs_rq:/.nr_running.avg
>>> 3.30 99% +266.3% 12.09 13%
sched_debug.cfs_rq:/.removed.load_avg.avg
>>> 153.02 97% +266.6% 560.96 13%
sched_debug.cfs_rq:/.removed.runnable_sum.avg
>>> 569.93 102% +173.2% 1556 14%
sched_debug.cfs_rq:/.removed.runnable_sum.stddev
>>> 1.42 60% +501.5% 8.52 34%
sched_debug.cfs_rq:/.removed.util_avg.avg
>>> 19.88 59% +288.9% 77.29 16%
sched_debug.cfs_rq:/.removed.util_avg.max
>>> 5.05 58% +342.3% 22.32 22%
sched_debug.cfs_rq:/.removed.util_avg.stddev
>>> 791.44 3% +47.7% 1168 8%
sched_debug.cfs_rq:/.util_avg.avg
>>> 1305 6% +33.2% 1738 5%
sched_debug.cfs_rq:/.util_avg.max
>>> 450.25 11% +66.2% 748.17 14%
sched_debug.cfs_rq:/.util_avg.min
>>> 220.82 8% +21.1% 267.46 5%
sched_debug.cfs_rq:/.util_avg.stddev
>>> 363118 11% -23.8% 276520 11% sched_debug.cpu.avg_idle.avg
>>> 726003 8% -30.8% 502313 4% sched_debug.cpu.avg_idle.max
>>> 202629 3% -32.2% 137429 18% sched_debug.cpu.avg_idle.stddev
>>> 31.96 28% +54.6% 49.42 14% sched_debug.cpu.cpu_load[3].min
>>> 36.21 25% +64.0% 59.38 6% sched_debug.cpu.cpu_load[4].min
>>> 1007 5% +20.7% 1216 7% sched_debug.cpu.curr->pid.avg
>>> 4.50 5% +14.8% 5.17 5% sched_debug.cpu.nr_running.max
>>> 2476195 -11.8% 2185022
sched_debug.cpu.nr_switches.max
>>> 212888 -26.6% 156172 3%
sched_debug.cpu.nr_switches.stddev
>>> 3570 2% -58.7% 1474 2%
sched_debug.cpu.nr_uninterruptible.max
>>> -803.67 -28.7% -573.38
sched_debug.cpu.nr_uninterruptible.min
>>> 1004 2% -50.4% 498.55 3%
sched_debug.cpu.nr_uninterruptible.stddev
>>> 2478809 -11.7% 2189310
sched_debug.cpu.sched_count.max
>>> 214130 -26.5% 157298 3%
sched_debug.cpu.sched_count.stddev
>>> 489430 2% -16.6% 408309 2% sched_debug.cpu.sched_goidle.avg
>>> 724333 2% -28.2% 520263 2% sched_debug.cpu.sched_goidle.max
>>> 457611 -18.1% 374746 3%
sched_debug.cpu.sched_goidle.min
>>> 62957 2% -47.4% 33138 3%
sched_debug.cpu.sched_goidle.stddev
>>> 676053 2% -15.4% 571816 2% sched_debug.cpu.ttwu_local.max
>>> 42669 3% +22.3% 52198 sched_debug.cpu.ttwu_local.min
>>> 151873 2% -18.3% 124118 2%
sched_debug.cpu.ttwu_local.stddev
>>>
>>>
>>>
>>> blogbench.write_score
>>>
>>> 3300 +-+------------------------------------------------------------------+
>>> 3250 +-+ +. .+ +. .+ : : : +. .+ .+.+.+. .|
>>> |: +. .+ +.+.+.+ + + + : +. : : +. + +.+ + + |
>>> 3200 +-+ + +.+ + : + + : + + |
>>> 3150 +-+.+ ++ +.+ |
>>> 3100 +-+ |
>>> 3050 +-+ |
>>> | |
>>> 3000 +-+ |
>>> 2950 +-+ O O |
>>> 2900 +-O O O O |
>>> 2850 +-+ O O O O O O O OO O O O |
>>> | O O O O |
>>> 2800 O-+ O O |
>>> 2750 +-+------------------------------------------------------------------+
>>>
>>>
>>> [*] bisect-good sample
>>> [O] bisect-bad sample
>>>
>>>
>>>
>>> Disclaimer:
>>> Results have been estimated based on internal Intel analysis and are
provided
>>> for informational purposes only. Any difference in system hardware or
software
>>> design or configuration may affect actual performance.
>>>
>>>
>>> Thanks,
>>> Xiaolong
>> _______________________________________________
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>> LKP(a)lists.01.org
>> https://lists.01.org/mailman/listinfo/lkp
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5:38 a.m.
On 19 Jun 2018, at 23:51, Huang, Ying wrote:
>> "Huang, Ying" <ying.huang(a)intel.com> writes:
>>
>>> Hi, Josef,
>>>
>>> Do you have time to take a look at the regression?
>>>
>>> kernel test robot <xiaolong.ye(a)intel.com> writes:
>>>
>>>> Greeting,
>>>>
>>>> FYI, we noticed a -12.3% regression of blogbench.write_score and a
>>>> +9.6% improvement
>>>> of blogbench.read_score due to commit:
>>>>
>>>>
>>>> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use
>>>> sc->priority for slab shrink targets")
>>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
>>>> master
>>>>
>>>> in testcase: blogbench
>>>> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz
>>>> with 8G memory
>>>> with following parameters:
>>>>
>>>> disk: 1SSD
>>>> fs: btrfs
>>>> cpufreq_governor: performance
>>>>
>>>> test-description: Blogbench is a portable filesystem benchmark
>>>> that tries to reproduce the load of a real-world busy file server.
>>>> test-url:
I'm surprised, this patch is a big win in production here at FB. I'll
have to reproduce these results to better understand what is going on.
My first guess is that since we have fewer inodes in slab, we're reading
more inodes from disk in order to do the writes.
But that should also make our read scores lower.
-chris
5:38 p.m.
Chris Mason <clm(a)fb.com> writes:
On 19 Jun 2018, at 23:51, Huang, Ying wrote:
>>> "Huang, Ying" <ying.huang(a)intel.com> writes:
>>>
>>>> Hi, Josef,
>>>>
>>>> Do you have time to take a look at the regression?
>>>>
>>>> kernel test robot <xiaolong.ye(a)intel.com> writes:
>>>>
>>>>> Greeting,
>>>>>
>>>>> FYI, we noticed a -12.3% regression of blogbench.write_score and
>>>>> a +9.6% improvement
>>>>> of blogbench.read_score due to commit:
>>>>>
>>>>>
>>>>> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use
>>>>> sc->priority for slab shrink targets")
>>>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
>>>>> master
>>>>>
>>>>> in testcase: blogbench
>>>>> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @
>>>>> 2.10GHz with 8G memory
>>>>> with following parameters:
>>>>>
>>>>> disk: 1SSD
>>>>> fs: btrfs
>>>>> cpufreq_governor: performance
>>>>>
>>>>> test-description: Blogbench is a portable filesystem benchmark
>>>>> that tries to reproduce the load of a real-world busy file
>>>>> server.
>>>>> test-url:
I'm surprised, this patch is a big win in production here at FB. I'll
have to reproduce these results to better understand what is going on.
My first guess is that since we have fewer inodes in slab, we're
reading more inodes from disk in order to do the writes.
But that should also make our read scores lower.
Thanks for looking at this. If you need more information, please let me
know.
Best Regards,
Huang, Ying
6:55 p.m.
Hi, Chris,
Chris Mason <clm(a)fb.com> writes:
On 19 Jun 2018, at 23:51, Huang, Ying wrote:
>>> "Huang, Ying" <ying.huang(a)intel.com> writes:
>>>
>>>> Hi, Josef,
>>>>
>>>> Do you have time to take a look at the regression?
>>>>
>>>> kernel test robot <xiaolong.ye(a)intel.com> writes:
>>>>
>>>>> Greeting,
>>>>>
>>>>> FYI, we noticed a -12.3% regression of blogbench.write_score and
>>>>> a +9.6% improvement
>>>>> of blogbench.read_score due to commit:
>>>>>
>>>>>
>>>>> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use
>>>>> sc->priority for slab shrink targets")
>>>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
>>>>> master
>>>>>
>>>>> in testcase: blogbench
>>>>> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @
>>>>> 2.10GHz with 8G memory
>>>>> with following parameters:
>>>>>
>>>>> disk: 1SSD
>>>>> fs: btrfs
>>>>> cpufreq_governor: performance
>>>>>
>>>>> test-description: Blogbench is a portable filesystem benchmark
>>>>> that tries to reproduce the load of a real-world busy file
>>>>> server.
>>>>> test-url:
I'm surprised, this patch is a big win in production here at FB. I'll
have to reproduce these results to better understand what is going on.
My first guess is that since we have fewer inodes in slab, we're
reading more inodes from disk in order to do the writes.
But that should also make our read scores lower.
Any update on this?
Best Regards,
Huang, Ying
10:55 p.m.
"Huang, Ying" <ying.huang(a)intel.com> writes:
Hi, Chris,
Chris Mason <clm(a)fb.com> writes:
> On 19 Jun 2018, at 23:51, Huang, Ying wrote:
>>>> "Huang, Ying" <ying.huang(a)intel.com> writes:
>>>>
>>>>> Hi, Josef,
>>>>>
>>>>> Do you have time to take a look at the regression?
>>>>>
>>>>> kernel test robot <xiaolong.ye(a)intel.com> writes:
>>>>>
>>>>>> Greeting,
>>>>>>
>>>>>> FYI, we noticed a -12.3% regression of blogbench.write_score and
>>>>>> a +9.6% improvement
>>>>>> of blogbench.read_score due to commit:
>>>>>>
>>>>>>
>>>>>> commit: 9092c71bb724dba2ecba849eae69e5c9d39bd3d2 ("mm: use
>>>>>> sc->priority for slab shrink targets")
>>>>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
>>>>>> master
>>>>>>
>>>>>> in testcase: blogbench
>>>>>> on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @
>>>>>> 2.10GHz with 8G memory
>>>>>> with following parameters:
>>>>>>
>>>>>> disk: 1SSD
>>>>>> fs: btrfs
>>>>>> cpufreq_governor: performance
>>>>>>
>>>>>> test-description: Blogbench is a portable filesystem benchmark
>>>>>> that tries to reproduce the load of a real-world busy file
>>>>>> server.
>>>>>> test-url:
>
> I'm surprised, this patch is a big win in production here at FB. I'll
> have to reproduce these results to better understand what is going on.
> My first guess is that since we have fewer inodes in slab, we're
> reading more inodes from disk in order to do the writes.
>
> But that should also make our read scores lower.
Any update on this?
Ping.
Best Regards,
Huang, Ying
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