Hi Dave,    Do you have time to look at this? Thanks. On 9/2/2021 3:27 PM, kernel test robot wrote: > > > Greeting, > > FYI, we noticed a -10.0% regression of stress-ng.fallocate.ops_per_sec > due to commit: > > > commit: bad77c375e8de6c776c848e443f7dc2d0d909be5 ("xfs: CIL checkpoint > flushes caches unconditionally") > 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: xfs >     class: filesystem >     test: fallocate >     cpufreq_governor: performance >     ucode: 0x5003006 > > > In addition to that, the commit also has significant impact on the > following tests: > > > > If you fix the issue, kindly add following tag > Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; > > > 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/xfs/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/fallocate/stress-ng/60s/0x5003006 > > > commit: >    0431d926b3 ("xfs: async blkdev cache flush") >    bad77c375e ("xfs: CIL checkpoint flushes caches unconditionally") > > 0431d926b399d74f bad77c375e8de6c776c848e443f > ---------------- --------------------------- >           %stddev     %change         %stddev >               \          |                \ >      618.67           -10.0%     556.67 ±  2%  stress-ng.fallocate.ops >       10.31           -10.0%       9.28 ±  2% > stress-ng.fallocate.ops_per_sec >      111618            -5.7%     105270 > stress-ng.time.voluntary_context_switches >      502.67 ±  2%     +52.0%     763.83 ± 47% > interrupts.CPU44.CAL:Function_call_interrupts >        2.10 ±  2%     -25.1%       1.57        iostat.cpu.iowait >        2.16 ±  2%      -0.5        1.62        mpstat.cpu.all.iowait% >        0.09 ± 11%     +45.0%       0.14 ± 34% > perf-sched.sch_delay.avg.ms.worker_thread.kthread.ret_from_fork >      151.00 ± 19%     +20.2%     181.50 ±  7% > perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork >        6749            +6.4%       7178 > perf-stat.i.context-switches >        6640            +6.4%       7063 > perf-stat.ps.context-switches >      353877            -1.4%     348924        proc-vmstat.pgfree >       39122           -15.1%      33221        proc-vmstat.pgpgout >        1225 ± 14%      -9.0%       1115        turbostat.Bzy_MHz >       86.82 ± 17%     -10.4%      77.83        turbostat.PkgWatt >      602.83           -15.1%     511.83        vmstat.io.bo >        6953            +6.1%       7376        vmstat.system.cs >        1.33 ±  6%      +0.4        1.70 ± 13% > perf-profile.calltrace.cycles-pp.perf_mux_hrtimer_handler.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt > >        0.08 ± 22%      +0.1        0.17 ± 23% > perf-profile.children.cycles-pp.wait_for_completion >        0.07 ± 17%      +0.1        0.19 ± 64% > perf-profile.children.cycles-pp.submit_bio >        0.07 ± 17%      +0.1        0.19 ± 64% > perf-profile.children.cycles-pp.submit_bio_noacct >        1.40 ±  8%      +0.3        1.74 ± 12% > perf-profile.children.cycles-pp.perf_mux_hrtimer_handler > > >                           stress-ng.fallocate.ops_per_sec >    12 > +----------------------------------------------------------------------+ > > |                                                                      | >    10 |.+.++.+.+.+ > +.+.+.++.+.+.++.+.+.+.++.+.+.++.+.+.++.+.+.+.++.+.+.++.+.| >       | O        :  :                             O O   OO O O O > OO          | >       |   OO O   :O :            O             O O > O                      | >     8 |-+      O :  : O O OO O O  O O O O OO > O                               | >       |          : > :                                                         | >     6 |-+        : > :                                                         | >       | > ::                                                         | >     4 |-+ > ::                                                         | >       | > ::                                                         | >       | > ::                                                         | >     2 |-+ > :                                                          | >       | > :                                                          | >     0 > +----------------------------------------------------------------------+ > [*] 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 >