Messages in this thread | | | Date | Tue, 30 Nov 2021 14:46:06 +0800 | Subject | Re: [LKP] Re: [xfs] bad77c375e: stress-ng.fallocate.ops_per_sec -10.0% regression | From | Xing Zhengjun <> |
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Hi Dave,
Do you have time to look at this? It still existed in v5.16-rc3. Thanks
On 9/3/2021 3:40 PM, Xing Zhengjun wrote: > 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@intel.com> >> >> >> 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 >> >
-- Zhengjun Xing
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