Greeting, FYI, we noticed a 32.2% improvement of stress-ng.fanotify.ops_per_sec due to commit: commit: a8b98c808eab3ec8f1b5a64be967b0f4af4cae43 ("fanotify: fix permission model of unprivileged group") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: stress-ng on test machine: 96 threads 2 sockets Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 512G memory with following parameters: nr_threads: 10% disk: 1HDD testtime: 60s fs: ext4 class: filesystem test: fanotify cpufreq_governor: performance ucode: 0x5003006 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 split-job --compatible job.yaml # generate the yaml file for lkp run bin/lkp run generated-yaml-file ========================================================================================= class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime/ucode: filesystem/gcc-9/performance/1HDD/ext4/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/fanotify/stress-ng/60s/0x5003006 commit: b577750e41 ("MAINTAINERS: Add Matthew Bobrowski as a reviewer") a8b98c808e ("fanotify: fix permission model of unprivileged group") b577750e4157050e a8b98c808eab3ec8f1b5a64be96 ---------------- --------------------------- %stddev %change %stddev \ | \ 86763162 +32.2% 1.147e+08 stress-ng.fanotify.ops 1445480 +32.2% 1910539 stress-ng.fanotify.ops_per_sec 28274341 +14.5% 32376584 ± 4% stress-ng.time.file_system_outputs 14639 ± 2% +28.3% 18779 ± 2% stress-ng.time.involuntary_context_switches 1603 +2.5% 1644 stress-ng.time.percent_of_cpu_this_job_got 989.77 +2.2% 1011 stress-ng.time.system_time 7.76 +24.2% 9.64 ± 3% stress-ng.time.user_time 158230 ± 3% -59.1% 64735 ± 62% stress-ng.time.voluntary_context_switches 17.33 +4.0% 18.02 iostat.cpu.system 0.01 ± 12% -48.7% 0.01 ± 73% perf-sched.sch_delay.max.ms.do_syslog.part.0.kmsg_read.vfs_read 187.32 +2.5% 191.94 turbostat.PkgWatt 173408 ± 6% +9.3% 189469 ± 4% interrupts.NMI:Non-maskable_interrupts 173408 ± 6% +9.3% 189469 ± 4% interrupts.PMI:Performance_monitoring_interrupts 37466 ± 28% -77.2% 8527 ± 41% numa-meminfo.node0.Dirty 34905 ± 29% -78.6% 7455 ± 42% numa-meminfo.node0.Inactive(file) 0.02 ± 12% -0.0 0.02 ± 14% mpstat.cpu.all.iowait% 0.70 ± 5% +0.2 0.88 ± 3% mpstat.cpu.all.soft% 0.18 +0.0 0.21 ± 3% mpstat.cpu.all.usr% 82.00 -1.2% 81.00 vmstat.cpu.id 6603 -19.9% 5287 ± 19% vmstat.memory.buff 7288 ± 2% -36.6% 4620 ± 26% vmstat.system.cs 3265335 ± 7% +19.3% 3896092 ± 5% numa-numastat.node0.local_node 3346695 ± 7% +17.3% 3926041 ± 6% numa-numastat.node0.numa_hit 81364 ± 14% -63.2% 29955 ± 53% numa-numastat.node0.other_node 3548555 ± 6% +23.1% 4367587 ± 3% numa-numastat.node1.local_node 3553822 ± 6% +24.5% 4424271 ± 4% numa-numastat.node1.numa_hit 5274 ±218% +974.8% 56690 ± 28% numa-numastat.node1.other_node 9280 ± 28% -77.4% 2097 ± 43% numa-vmstat.node0.nr_dirty 8654 ± 29% -78.8% 1836 ± 43% numa-vmstat.node0.nr_inactive_file 8654 ± 29% -78.8% 1837 ± 43% numa-vmstat.node0.nr_zone_inactive_file 9286 ± 29% -76.7% 2163 ± 43% numa-vmstat.node0.nr_zone_write_pending 84889 ± 13% -61.7% 32478 ± 42% numa-vmstat.node0.numa_other 13513 ± 88% +387.9% 65928 ± 20% numa-vmstat.node1.numa_other 9173 ± 6% -11.5% 8118 ± 5% softirqs.CPU18.SCHED 9438 ± 6% -15.9% 7938 ± 12% softirqs.CPU38.SCHED 5148 ± 24% +123.7% 11518 ± 35% softirqs.CPU42.RCU 3794 ± 10% +86.4% 7075 ± 47% softirqs.CPU87.RCU 6193 ± 33% +58.8% 9833 ± 26% softirqs.CPU93.RCU 805948 ± 2% +15.6% 931978 softirqs.RCU 6787 -19.3% 5480 ± 19% meminfo.Active(file) 6597 -20.0% 5276 ± 19% meminfo.Buffers 61060 ± 5% -71.6% 17318 ± 62% meminfo.Dirty 358019 -14.2% 307304 ± 5% meminfo.Inactive 57195 ± 5% -72.4% 15781 ± 64% meminfo.Inactive(file) 135110 ± 2% -17.9% 110864 ± 3% meminfo.KReclaimable 135110 ± 2% -17.9% 110864 ± 3% meminfo.SReclaimable 1697 -19.3% 1370 ± 18% proc-vmstat.nr_active_file 3536717 +14.5% 4048711 ± 4% proc-vmstat.nr_dirtied 15154 ± 5% -71.4% 4341 ± 63% proc-vmstat.nr_dirty 286580 -3.7% 275906 proc-vmstat.nr_file_pages 14194 ± 5% -72.2% 3952 ± 64% proc-vmstat.nr_inactive_file 33734 ± 2% -18.0% 27679 ± 3% proc-vmstat.nr_slab_reclaimable 1697 -19.3% 1370 ± 18% proc-vmstat.nr_zone_active_file 14194 ± 5% -72.2% 3952 ± 64% proc-vmstat.nr_zone_inactive_file 15107 ± 5% -70.5% 4456 ± 62% proc-vmstat.nr_zone_write_pending 6916501 +20.9% 8365370 ± 2% proc-vmstat.numa_hit 6829859 +21.2% 8278720 ± 2% proc-vmstat.numa_local 6112 ± 5% +8.8% 6650 ± 3% proc-vmstat.pgactivate 10102561 +28.1% 12945356 ± 2% proc-vmstat.pgalloc_normal 9959455 +28.5% 12802727 ± 3% proc-vmstat.pgfree 47144 ± 7% -39.7% 28440 ± 6% slabinfo.buffer_head.active_objs 1218 ± 7% -39.1% 741.67 ± 6% slabinfo.buffer_head.active_slabs 47555 ± 7% -39.2% 28931 ± 6% slabinfo.buffer_head.num_objs 1218 ± 7% -39.1% 741.67 ± 6% slabinfo.buffer_head.num_slabs 129606 -14.5% 110804 ± 2% slabinfo.dentry.active_objs 3127 -14.5% 2674 ± 2% slabinfo.dentry.active_slabs 131378 -14.5% 112353 ± 2% slabinfo.dentry.num_objs 3127 -14.5% 2674 ± 2% slabinfo.dentry.num_slabs 106711 ± 8% -36.6% 67653 ± 6% slabinfo.ext4_extent_status.active_objs 1048 ± 8% -36.6% 664.50 ± 6% slabinfo.ext4_extent_status.active_slabs 106945 ± 8% -36.6% 67834 ± 6% slabinfo.ext4_extent_status.num_objs 1048 ± 8% -36.6% 664.50 ± 6% slabinfo.ext4_extent_status.num_slabs 24635 ± 3% -45.2% 13505 ± 13% slabinfo.ext4_inode_cache.active_objs 947.00 ± 4% -48.5% 487.33 ± 14% slabinfo.ext4_inode_cache.active_slabs 26527 ± 4% -48.5% 13658 ± 14% slabinfo.ext4_inode_cache.num_objs 947.00 ± 4% -48.5% 487.33 ± 14% slabinfo.ext4_inode_cache.num_slabs 114430 ± 5% +13.1% 129428 ± 3% slabinfo.filp.active_objs 3583 ± 5% +13.1% 4053 ± 3% slabinfo.filp.active_slabs 114684 ± 5% +13.1% 129710 ± 3% slabinfo.filp.num_objs 3583 ± 5% +13.1% 4053 ± 3% slabinfo.filp.num_slabs 2133 ± 4% -27.7% 1541 ± 22% slabinfo.jbd2_journal_head.active_objs 2133 ± 4% -27.7% 1541 ± 22% slabinfo.jbd2_journal_head.num_objs 1700 ± 5% -10.4% 1523 ± 5% slabinfo.khugepaged_mm_slot.active_objs 1700 ± 5% -10.4% 1523 ± 5% slabinfo.khugepaged_mm_slot.num_objs 991.83 ± 3% +11.9% 1109 ± 4% slabinfo.kmalloc-256.active_slabs 31752 ± 3% +11.9% 35520 ± 4% slabinfo.kmalloc-256.num_objs 991.83 ± 3% +11.9% 1109 ± 4% slabinfo.kmalloc-256.num_slabs 9850 ± 3% -30.4% 6852 ± 13% slabinfo.kmalloc-rcl-512.active_objs 9933 ± 3% -30.3% 6925 ± 13% slabinfo.kmalloc-rcl-512.num_objs 89858 ± 3% -15.7% 75727 ± 4% slabinfo.vmap_area.active_objs 1422 ± 3% -16.3% 1190 ± 4% slabinfo.vmap_area.active_slabs 91033 ± 3% -16.3% 76222 ± 4% slabinfo.vmap_area.num_objs 1422 ± 3% -16.3% 1190 ± 4% slabinfo.vmap_area.num_slabs 12.02 ± 8% -10.3% 10.78 ± 4% perf-stat.i.MPKI 3.726e+09 +16.7% 4.347e+09 ± 2% perf-stat.i.branch-instructions 27267896 +7.6% 29328635 perf-stat.i.branch-misses 32.59 ± 3% +2.7 35.27 ± 2% perf-stat.i.cache-miss-rate% 72069672 ± 2% +16.9% 84243539 ± 3% perf-stat.i.cache-misses 2.17e+08 ± 2% +7.9% 2.342e+08 ± 2% perf-stat.i.cache-references 7282 -38.1% 4505 ± 27% perf-stat.i.context-switches 2.65 -11.3% 2.35 ± 2% perf-stat.i.cpi 4.891e+10 +4.4% 5.105e+10 perf-stat.i.cpu-cycles 194.63 +9.8% 213.71 perf-stat.i.cpu-migrations 737.10 ± 2% -9.4% 667.84 perf-stat.i.cycles-between-cache-misses 749259 ± 18% -35.6% 482663 ± 18% perf-stat.i.dTLB-load-misses 5.399e+09 +17.9% 6.367e+09 ± 2% perf-stat.i.dTLB-loads 2.864e+09 +20.2% 3.443e+09 ± 2% perf-stat.i.dTLB-stores 1.832e+10 +17.2% 2.146e+10 ± 2% perf-stat.i.instructions 1325 +11.6% 1479 perf-stat.i.instructions-per-iTLB-miss 0.38 +11.6% 0.43 ± 2% perf-stat.i.ipc 0.51 +4.4% 0.53 perf-stat.i.metric.GHz 520.49 +14.9% 598.21 ± 2% perf-stat.i.metric.K/sec 127.15 +17.9% 149.92 ± 2% perf-stat.i.metric.M/sec 26413268 +18.1% 31202417 ± 3% perf-stat.i.node-load-misses 81.23 +2.4 83.61 perf-stat.i.node-store-miss-rate% 13620737 +22.0% 16617089 ± 4% perf-stat.i.node-store-misses 11.85 ± 2% -7.9% 10.92 ± 3% perf-stat.overall.MPKI 0.73 -0.1 0.68 ± 2% perf-stat.overall.branch-miss-rate% 33.22 ± 3% +2.8 35.97 ± 2% perf-stat.overall.cache-miss-rate% 2.67 -10.9% 2.38 ± 2% perf-stat.overall.cpi 678.95 -10.7% 606.59 ± 2% perf-stat.overall.cycles-between-cache-misses 0.01 ± 19% -0.0 0.01 ± 19% perf-stat.overall.dTLB-load-miss-rate% 0.01 ± 6% -0.0 0.01 ± 9% perf-stat.overall.dTLB-store-miss-rate% 1237 +12.9% 1398 perf-stat.overall.instructions-per-iTLB-miss 0.37 +12.2% 0.42 ± 2% perf-stat.overall.ipc 88.23 +1.4 89.62 perf-stat.overall.node-load-miss-rate% 82.89 +2.8 85.72 perf-stat.overall.node-store-miss-rate% 3.668e+09 +16.6% 4.278e+09 ± 2% perf-stat.ps.branch-instructions 26840788 +7.5% 28863296 perf-stat.ps.branch-misses 70936457 ± 2% +16.9% 82908277 ± 3% perf-stat.ps.cache-misses 2.137e+08 ± 2% +7.9% 2.305e+08 ± 2% perf-stat.ps.cache-references 7174 ± 2% -38.0% 4446 ± 28% perf-stat.ps.context-switches 4.814e+10 +4.4% 5.024e+10 perf-stat.ps.cpu-cycles 191.65 +9.9% 210.65 perf-stat.ps.cpu-migrations 737105 ± 18% -35.7% 474008 ± 18% perf-stat.ps.dTLB-load-misses 5.315e+09 +17.9% 6.267e+09 ± 2% perf-stat.ps.dTLB-loads 2.819e+09 +20.2% 3.389e+09 ± 2% perf-stat.ps.dTLB-stores 14569596 ± 2% +3.7% 15104767 perf-stat.ps.iTLB-load-misses 1.803e+10 +17.1% 2.112e+10 ± 2% perf-stat.ps.instructions 25998185 +18.1% 30704499 ± 3% perf-stat.ps.node-load-misses 13406477 +22.0% 16351829 ± 4% perf-stat.ps.node-store-misses 1.156e+12 +15.4% 1.334e+12 ± 2% perf-stat.total.instructions 9.17 ± 10% -4.6 4.62 ± 33% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.fsnotify_add_event.fanotify_handle_event.fsnotify 10.31 ± 9% -4.1 6.20 ± 19% perf-profile.calltrace.cycles-pp._raw_spin_lock.fsnotify_add_event.fanotify_handle_event.fsnotify.__fsnotify_parent 7.46 ± 8% -2.2 5.29 ± 14% perf-profile.calltrace.cycles-pp.fsnotify_add_event.fanotify_handle_event.fsnotify.__fsnotify_parent.do_sys_openat2 1.04 ± 6% -0.7 0.32 ±101% perf-profile.calltrace.cycles-pp.fanotify_merge.fsnotify_add_event.fanotify_handle_event.fsnotify.__fsnotify_parent 0.68 ± 7% +0.2 0.92 ± 9% perf-profile.calltrace.cycles-pp.__x64_sys_close.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.47 ± 44% +0.3 0.73 ± 8% perf-profile.calltrace.cycles-pp.filp_close.__x64_sys_close.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.70 ± 8% +0.3 0.97 ± 9% perf-profile.calltrace.cycles-pp.dput.path_put.fanotify_free_event.fanotify_read.vfs_read 0.71 ± 8% +0.3 0.99 ± 9% perf-profile.calltrace.cycles-pp.path_put.fanotify_free_event.fanotify_read.vfs_read.ksys_read 0.52 ± 45% +0.3 0.85 ± 10% perf-profile.calltrace.cycles-pp.lockref_put_return.dput.path_put.fanotify_free_event.fanotify_read 0.73 ± 8% +0.4 1.09 ± 8% perf-profile.calltrace.cycles-pp.ext4_file_open.do_dentry_open.dentry_open.copy_event_to_user.fanotify_read 0.51 ± 44% +0.4 0.89 ± 8% perf-profile.calltrace.cycles-pp.fscrypt_file_open.ext4_file_open.do_dentry_open.dentry_open.copy_event_to_user 1.13 ± 11% +0.4 1.52 ± 9% perf-profile.calltrace.cycles-pp._raw_spin_lock.fanotify_read.vfs_read.ksys_read.do_syscall_64 0.18 ±141% +0.4 0.60 ± 6% perf-profile.calltrace.cycles-pp.kmem_cache_free.fanotify_handle_event.fsnotify.__fsnotify_parent.__fput 0.17 ±141% +0.4 0.61 ± 10% perf-profile.calltrace.cycles-pp.fsnotify_destroy_event.fanotify_read.vfs_read.ksys_read.do_syscall_64 0.26 ±100% +0.5 0.72 ± 6% perf-profile.calltrace.cycles-pp.put_pid.fanotify_free_event.fanotify_read.vfs_read.ksys_read 1.25 ± 7% +0.5 1.76 ± 8% perf-profile.calltrace.cycles-pp.fanotify_free_event.fanotify_read.vfs_read.ksys_read.do_syscall_64 1.21 ± 12% +0.5 1.72 ± 10% perf-profile.calltrace.cycles-pp.kmem_cache_alloc.__alloc_file.alloc_empty_file.dentry_open.copy_event_to_user 1.66 ± 10% +0.6 2.26 ± 9% perf-profile.calltrace.cycles-pp.kmem_cache_free.fanotify_read.vfs_read.ksys_read.do_syscall_64 0.00 +0.9 0.92 ± 11% perf-profile.calltrace.cycles-pp._raw_spin_lock.alloc_fd.copy_event_to_user.fanotify_read.vfs_read 0.00 +1.1 1.07 ± 10% perf-profile.calltrace.cycles-pp.alloc_fd.copy_event_to_user.fanotify_read.vfs_read.ksys_read 4.45 ± 6% -4.2 0.28 ± 12% perf-profile.children.cycles-pp.ns_capable_common 4.37 ± 6% -4.1 0.28 ± 12% perf-profile.children.cycles-pp.security_capable 10.27 ± 9% -4.1 6.18 ± 21% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath 4.32 ± 7% -4.1 0.27 ± 13% perf-profile.children.cycles-pp.apparmor_capable 15.78 ± 8% -3.8 11.97 ± 14% perf-profile.children.cycles-pp.fsnotify_add_event 12.40 ± 9% -2.9 9.46 ± 14% perf-profile.children.cycles-pp._raw_spin_lock 1.49 ± 7% -0.5 0.96 ± 14% perf-profile.children.cycles-pp.fanotify_merge 0.61 ± 12% -0.4 0.24 ± 40% perf-profile.children.cycles-pp.__x64_sys_ioctl 0.60 ± 12% -0.4 0.24 ± 40% perf-profile.children.cycles-pp.do_vfs_ioctl 0.60 ± 13% -0.4 0.24 ± 39% perf-profile.children.cycles-pp.fanotify_ioctl 0.10 ± 6% +0.0 0.12 ± 8% perf-profile.children.cycles-pp.ext4_map_blocks 0.07 ± 14% +0.0 0.09 ± 9% perf-profile.children.cycles-pp.__fsnotify_alloc_group 0.12 ± 12% +0.0 0.15 ± 5% perf-profile.children.cycles-pp.ext4_ext_map_blocks 0.06 ± 7% +0.0 0.09 ± 7% perf-profile.children.cycles-pp.copy_user_generic_unrolled 0.04 ± 71% +0.0 0.07 ± 7% perf-profile.children.cycles-pp.__check_block_validity 0.03 ± 70% +0.0 0.07 ± 11% perf-profile.children.cycles-pp.alloc_page_buffers 0.06 ± 11% +0.0 0.10 ± 5% perf-profile.children.cycles-pp.rcu_segcblist_enqueue 0.14 ± 9% +0.0 0.18 ± 7% perf-profile.children.cycles-pp._copy_to_user 0.21 ± 12% +0.0 0.25 ± 7% perf-profile.children.cycles-pp.ext4_da_map_blocks 0.13 ± 6% +0.0 0.17 ± 8% perf-profile.children.cycles-pp.ext4_getblk 0.12 ± 10% +0.0 0.17 ± 9% perf-profile.children.cycles-pp.close_fd 0.21 ± 12% +0.0 0.25 ± 7% perf-profile.children.cycles-pp.ext4_da_get_block_prep 0.14 ± 10% +0.1 0.19 ± 9% perf-profile.children.cycles-pp.task_work_add 0.14 ± 12% +0.1 0.20 ± 9% perf-profile.children.cycles-pp.errseq_sample 0.19 ± 11% +0.1 0.25 ± 6% perf-profile.children.cycles-pp.syscall_return_via_sysret 0.19 ± 14% +0.1 0.26 ± 9% perf-profile.children.cycles-pp.page_counter_try_charge 0.12 ± 15% +0.1 0.19 ± 9% perf-profile.children.cycles-pp.fsnotify_peek_first_event 0.31 ± 7% +0.1 0.38 ± 7% perf-profile.children.cycles-pp.__list_add_valid 0.22 ± 14% +0.1 0.29 ± 9% perf-profile.children.cycles-pp.obj_cgroup_charge_pages 0.17 ± 10% +0.1 0.25 ± 8% perf-profile.children.cycles-pp.fanotify_insert_event 0.26 ± 7% +0.1 0.35 ± 9% perf-profile.children.cycles-pp.locks_remove_posix 0.21 ± 10% +0.1 0.29 ± 10% perf-profile.children.cycles-pp.fput_many 0.19 ± 11% +0.1 0.28 ± 7% perf-profile.children.cycles-pp.call_rcu 0.24 ± 13% +0.1 0.33 ± 9% perf-profile.children.cycles-pp.page_counter_cancel 0.22 ± 6% +0.1 0.33 ± 8% perf-profile.children.cycles-pp.pid_vnr 0.46 ± 10% +0.1 0.59 ± 8% perf-profile.children.cycles-pp.obj_cgroup_charge 0.33 ± 18% +0.1 0.46 ± 10% perf-profile.children.cycles-pp.page_counter_uncharge 0.38 ± 10% +0.1 0.52 ± 10% perf-profile.children.cycles-pp.obj_cgroup_uncharge_pages 0.68 ± 8% +0.2 0.85 ± 9% perf-profile.children.cycles-pp.fsnotify_destroy_event 0.55 ± 6% +0.2 0.74 ± 8% perf-profile.children.cycles-pp.filp_close 0.36 ± 7% +0.2 0.56 ± 8% perf-profile.children.cycles-pp.lockref_get_not_zero 0.38 ± 8% +0.2 0.60 ± 7% perf-profile.children.cycles-pp.dget_parent 0.68 ± 7% +0.2 0.92 ± 9% perf-profile.children.cycles-pp.__x64_sys_close 0.68 ± 10% +0.2 0.93 ± 11% perf-profile.children.cycles-pp.drain_obj_stock 1.29 ± 9% +0.3 1.57 ± 7% perf-profile.children.cycles-pp.irq_exit_rcu 0.67 ± 8% +0.3 0.98 ± 7% perf-profile.children.cycles-pp.fscrypt_file_open 0.86 ± 8% +0.4 1.22 ± 7% perf-profile.children.cycles-pp.ext4_file_open 1.21 ± 9% +0.4 1.64 ± 10% perf-profile.children.cycles-pp.refill_obj_stock 1.94 ± 10% +0.5 2.46 ± 9% perf-profile.children.cycles-pp._raw_spin_lock_irqsave 1.29 ± 16% +0.6 1.86 ± 10% perf-profile.children.cycles-pp.get_obj_cgroup_from_current 0.33 ± 12% +0.8 1.12 ± 10% perf-profile.children.cycles-pp.alloc_fd 5.78 ± 9% +1.8 7.57 ± 9% perf-profile.children.cycles-pp.kmem_cache_free 10.17 ± 9% -4.1 6.09 ± 21% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath 4.21 ± 7% -3.9 0.26 ± 11% perf-profile.self.cycles-pp.apparmor_capable 1.47 ± 7% -0.5 0.94 ± 14% perf-profile.self.cycles-pp.fanotify_merge 0.56 ± 12% -0.3 0.22 ± 40% perf-profile.self.cycles-pp.fanotify_ioctl 0.07 ± 6% +0.0 0.09 ± 7% perf-profile.self.cycles-pp.fd_install 0.06 ± 7% +0.0 0.09 ± 13% perf-profile.self.cycles-pp.copy_user_generic_unrolled 0.04 ± 45% +0.0 0.07 ± 10% perf-profile.self.cycles-pp.dentry_open 0.06 ± 11% +0.0 0.10 ± 5% perf-profile.self.cycles-pp.rcu_segcblist_enqueue 0.12 ± 11% +0.0 0.16 ± 8% perf-profile.self.cycles-pp.call_rcu 0.11 ± 15% +0.0 0.15 ± 12% perf-profile.self.cycles-pp.fsnotify_remove_queued_event 0.08 ± 8% +0.0 0.12 ± 12% perf-profile.self.cycles-pp.alloc_fd 0.13 ± 8% +0.0 0.18 ± 8% perf-profile.self.cycles-pp.task_work_add 0.14 ± 14% +0.1 0.19 ± 9% perf-profile.self.cycles-pp.ext4_file_open 0.18 ± 15% +0.1 0.23 ± 10% perf-profile.self.cycles-pp.page_counter_try_charge 0.14 ± 9% +0.1 0.19 ± 8% perf-profile.self.cycles-pp.errseq_sample 0.19 ± 13% +0.1 0.24 ± 7% perf-profile.self.cycles-pp.syscall_return_via_sysret 0.23 ± 7% +0.1 0.29 ± 7% perf-profile.self.cycles-pp.dput 0.11 ± 14% +0.1 0.18 ± 7% perf-profile.self.cycles-pp.fsnotify_peek_first_event 0.31 ± 8% +0.1 0.38 ± 7% perf-profile.self.cycles-pp.__list_add_valid 0.26 ± 7% +0.1 0.33 ± 10% perf-profile.self.cycles-pp.locks_remove_posix 0.23 ± 10% +0.1 0.30 ± 9% perf-profile.self.cycles-pp.ext4_release_file 0.17 ± 10% +0.1 0.25 ± 9% perf-profile.self.cycles-pp.fanotify_insert_event 0.23 ± 13% +0.1 0.33 ± 10% perf-profile.self.cycles-pp.page_counter_cancel 0.21 ± 8% +0.1 0.32 ± 7% perf-profile.self.cycles-pp.pid_vnr 0.66 ± 7% +0.2 0.82 ± 9% perf-profile.self.cycles-pp.fsnotify_destroy_event 0.52 ± 9% +0.2 0.68 ± 9% perf-profile.self.cycles-pp.refill_obj_stock 0.33 ± 9% +0.2 0.52 ± 6% perf-profile.self.cycles-pp.lockref_get_not_zero 0.76 ± 7% +0.2 0.97 ± 7% perf-profile.self.cycles-pp.do_dentry_open 1.52 ± 11% +0.5 2.00 ± 9% perf-profile.self.cycles-pp.kmem_cache_alloc 1.71 ± 10% +0.5 2.19 ± 8% perf-profile.self.cycles-pp._raw_spin_lock_irqsave 1.22 ± 16% +0.5 1.74 ± 10% perf-profile.self.cycles-pp.get_obj_cgroup_from_current 2.34 ± 10% +1.1 3.48 ± 8% perf-profile.self.cycles-pp._raw_spin_lock stress-ng.time.involuntary_context_switches 20000 +-------------------------------------------------------------------+ | OO O | 19000 |-O O O O O O O O O O O | | O O O OO O O O O O O OO O | | O O O | 18000 |-+ O O O | | | 17000 |-+ | | | 16000 |-+ | | ++ + | |: + : : :: + | 15000 |:+ + + +. .+. : : : : .+.+. +.+ .+ + | | +.++.+ +.+ + ++.+. .+ +.+.+.+ +.+.+.++ + + .+ +.| 14000 +-------------------------------------------------------------------+ stress-ng.fanotify.ops 1.25e+08 +----------------------------------------------------------------+ | O | 1.2e+08 |-+ O O O O O O O O O O | 1.15e+08 |-O O OO O O O O O O O O O O O O O | | O O O OO | 1.1e+08 |-+O | 1.05e+08 |-+ | | | 1e+08 |-+ | 9.5e+07 |-+ | | + | 9e+07 |-+ + : + + .+. + | 8.5e+07 |.+ .+. + : .+. +.+. .+.+ + : + : + +.+ + +| | ++.+ ++.+.+ +.++ + +.++ +.+.+ + : + : + | 8e+07 +----------------------------------------------------------------+ stress-ng.fanotify.ops_per_sec 2.1e+06 +-----------------------------------------------------------------+ | O | 2e+06 |-+ OO O O | | O O OO O O O O O O O OO O O O O O OO O | 1.9e+06 |-+ O O O O O O O | 1.8e+06 |-+O | | | 1.7e+06 |-+ | | | 1.6e+06 |-+ + | 1.5e+06 |-+ :: | | .+. .+ : +. +. .+ + +. .+.+. +.| 1.4e+06 |.+ .+ ++.+.+ :.+.+ +.+.++. .+ +.+. + + + +. + ++ + | | + + + + + + | 1.3e+06 +-----------------------------------------------------------------+ [*] 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. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang