Re: [smb3] 5efdd9122e: filebench.sum_operations/s -50.0% regression
From: Steve French
Date: Thu Mar 23 2023 - 16:01:20 EST
This is VERY useful data. Thank you. It show the SMB3 CLOSE
operation on the wire takes twice as long to complete with
closetimeo=5 rather than 1. Can you do the same stats for
closetimeo=0
On Thu, Mar 23, 2023 at 2:48 AM Yin Fengwei <fengwei.yin@xxxxxxxxx> wrote:
>
> On 3/15/23 22:26, Steve French wrote:
> > Can you verify what this perf looks like with "closetime=0" and "closetime=1"
> >
> > Are there differences in /proc/fs/cifs/Stats when you run the same
> > steps with "closetimeo=1" vs. the more recent default (5 seconds)?
> The dump of /proc/fs/cifs/Stats are attached. You can tell which
> closetimeo is used from the file name. Thanks.
>
>
> Regards
> Yin, Fengwei
>
> >
> > On Wed, Mar 15, 2023 at 2:46 AM Yin, Fengwei <fengwei.yin@xxxxxxxxx> wrote:
> >>
> >>
> >>
> >> On 8/26/2022 10:41 AM, kernel test robot wrote:
> >>> Greeting,
> >>>
> >>> FYI, we noticed a -50.0% regression of filebench.sum_operations/s due to commit:
> >>>
> >>>
> >>> commit: 5efdd9122eff772eae2feae9f0fc0ec02d4846a3 ("smb3: allow deferred close timeout to be configurable")
> >>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >>>
> >>> in testcase: filebench
> >>> on test machine: 88 threads 2 sockets Intel(R) Xeon(R) Gold 6238M CPU @ 2.10GHz (Cascade Lake) with 128G memory
> >>> with following parameters:
> >>>
> >>> disk: 1HDD
> >>> fs: ext4
> >>> fs2: cifs
> >>> test: filemicro_delete.f
> >>> cpufreq_governor: performance
> >>> ucode: 0x5003302
> >> Please note, we still could see this regresion on v6.3-rc2. And the regression is related with
> >> the commit: 5efdd9122eff772eae2feae9f0fc0ec02d4846a3. This commit changed the default timeout
> >> value from 1s to 5s. If change the timeout back to 1s as following:
> >>
> >> diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
> >> index 6d13f8207e96..6b930fb0c4bd 100644
> >> --- a/fs/cifs/fs_context.c
> >> +++ b/fs/cifs/fs_context.c
> >> @@ -1537,7 +1537,7 @@ int smb3_init_fs_context(struct fs_context *fc)
> >>
> >> ctx->acregmax = CIFS_DEF_ACTIMEO;
> >> ctx->acdirmax = CIFS_DEF_ACTIMEO;
> >> - ctx->closetimeo = SMB3_DEF_DCLOSETIMEO;
> >> + ctx->closetimeo = CIFS_DEF_ACTIMEO;
> >>
> >> /* Most clients set timeout to 0, allows server to use its default */
> >> ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
> >>
> >> The regression is gone:
> >> dcb45fd7f501f864 v6.3-rc2 32715af441411a5a266606be08f
> >> ---------------- --------------------------- ---------------------------
> >> fail:runs %reproduction fail:runs %reproduction fail:runs
> >> | | | | |
> >> :25 0% :3 33% 1:3 last_state.booting
> >> :25 0% :3 33% 1:3 last_state.is_incomplete_run
> >> %stddev %change %stddev %change %stddev
> >> \ | \ | \
> >> 515.95 -50.0% 257.98 -0.0% 515.92 filebench.sum_operations/s
> >> 5.04 ± 7% +833.7% 47.09 ± 2% -2.9% 4.90 ± 2% filebench.sum_time_ms/op
> >> 10438 -100.0% 0.33 ±141% -100.0% 0.50 ±100% filebench.time.major_page_faults
> >> 167575 -4.1% 160660 -4.4% 160140 filebench.time.maximum_resident_set_size
> >> 7138 ± 11% +141.4% 17235 ± 3% +147.6% 17677 filebench.time.minor_page_faults
> >> 28.68 ± 9% +199.9% 86.00 ± 7% -2.4% 28.00 filebench.time.percent_of_cpu_this_job_got
> >> 2453485 ± 54% -63.0% 907380 -66.2% 830273 ± 6% cpuidle..usage
> >> 0.61 ± 38% +0.8 1.41 ± 3% +0.2 0.80 ± 4% mpstat.cpu.all.sys%
> >> 142984 ± 13% -45.6% 77725 -47.5% 75106 vmstat.system.in
> >> 34.23 ± 7% +27.9% 43.79 +27.8% 43.74 boot-time.boot
> >> 17.09 ± 11% +66.0% 28.38 +65.5% 28.28 boot-time.dhcp
> >> 2661 ± 7% +37.5% 3659 +37.2% 3651 boot-time.idle
> >> 104737 ±185% -87.8% 12762 ± 10% -89.8% 10631 ± 4% turbostat.C1
> >>
> >>
> >> 32715af441411a5a266606be08f is v6.3-rc2 with the change to restore the timeout to 1s. Thanks.
> >>
> >> Regards
> >> Yin, Fengwei
> >>
> >>
> >>>
> >>>
> >>> =========================================================================================
> >>> compiler/cpufreq_governor/disk/fs2/fs/kconfig/rootfs/tbox_group/test/testcase/ucode:
> >>> gcc-11/performance/1HDD/cifs/ext4/x86_64-rhel-8.3/debian-11.1-x86_64-20220510.cgz/lkp-csl-2sp9/filemicro_delete.f/filebench/0x5003302
> >>>
> >>> commit:
> >>> dcb45fd7f5 ("cifs: Do not use tcon->cfid directly, use the cfid we get from open_cached_dir")
> >>> 5efdd9122e ("smb3: allow deferred close timeout to be configurable")
> >>>
> >>> dcb45fd7f501f864 5efdd9122eff772eae2feae9f0f
> >>> ---------------- ---------------------------
> >>> %stddev %change %stddev
> >>> \ | \
> >>> 515.95 -50.0% 257.98 filebench.sum_operations/s
> >>> 4.81 ± 2% +1038.4% 54.78 ± 6% filebench.sum_time_ms/op
> >>> 29.00 ± 8% +212.1% 90.50 ± 3% filebench.time.percent_of_cpu_this_job_got
> >>> 24629 +2.7% 25297 filebench.time.voluntary_context_switches
> >>> 7.685e+08 +19.3% 9.169e+08 ± 4% cpuidle..time
> >>> 2.53 ± 6% -20.6% 2.00 ± 3% iostat.cpu.iowait
> >>> 1506141 ± 8% +22.4% 1843256 ± 3% turbostat.IRQ
> >>> 2.00 -50.0% 1.00 vmstat.procs.b
> >>> 21969 ± 2% -9.5% 19885 ± 2% vmstat.system.cs
> >>> 3.06 ± 7% -0.7 2.35 ± 4% mpstat.cpu.all.iowait%
> >>> 0.79 ± 5% +0.5 1.27 ± 2% mpstat.cpu.all.sys%
> >>> 0.89 ± 3% -0.1 0.79 ± 3% mpstat.cpu.all.usr%
> >>> 34.55 ± 14% -34.8% 22.51 ± 27% sched_debug.cfs_rq:/.removed.runnable_avg.avg
> >>> 119.64 ± 3% -20.0% 95.69 ± 17% sched_debug.cfs_rq:/.removed.runnable_avg.stddev
> >>> 34.55 ± 14% -34.8% 22.51 ± 27% sched_debug.cfs_rq:/.removed.util_avg.avg
> >>> 119.64 ± 3% -20.0% 95.69 ± 17% sched_debug.cfs_rq:/.removed.util_avg.stddev
> >>> 5249 +15.8% 6076 meminfo.Active
> >>> 3866 ± 2% +17.7% 4552 meminfo.Active(anon)
> >>> 1382 ± 4% +10.3% 1524 ± 4% meminfo.Active(file)
> >>> 69791 ± 14% +39.8% 97553 ± 6% meminfo.AnonHugePages
> >>> 72709 ± 2% +12.5% 81779 ± 3% meminfo.Inactive(file)
> >>> 23219 +13.5% 26352 ± 3% meminfo.KernelStack
> >>> 966.50 ± 2% +17.7% 1137 proc-vmstat.nr_active_anon
> >>> 74302 +6.3% 78977 ± 2% proc-vmstat.nr_anon_pages
> >>> 81133 +6.0% 85973 proc-vmstat.nr_inactive_anon
> >>> 18172 ± 2% +12.5% 20442 ± 3% proc-vmstat.nr_inactive_file
> >>> 23213 +13.5% 26348 ± 3% proc-vmstat.nr_kernel_stack
> >>> 17983 +2.3% 18400 proc-vmstat.nr_mapped
> >>> 7446 ± 2% +5.5% 7853 ± 3% proc-vmstat.nr_shmem
> >>> 26888 +1.6% 27306 proc-vmstat.nr_slab_reclaimable
> >>> 47220 +3.4% 48803 proc-vmstat.nr_slab_unreclaimable
> >>> 966.50 ± 2% +17.7% 1137 proc-vmstat.nr_zone_active_anon
> >>> 81133 +6.0% 85973 proc-vmstat.nr_zone_inactive_anon
> >>> 18172 ± 2% +12.5% 20442 ± 3% proc-vmstat.nr_zone_inactive_file
> >>> 361460 +2.5% 370454 proc-vmstat.numa_hit
> >>> 946.67 +18.6% 1122 proc-vmstat.pgactivate
> >>> 361562 +2.5% 370553 proc-vmstat.pgalloc_normal
> >>> 187906 +4.7% 196761 proc-vmstat.pgfault
> >>> 8189 +2.5% 8395 proc-vmstat.pgreuse
> >>> 1.097e+09 +15.5% 1.267e+09 ± 7% perf-stat.i.branch-instructions
> >>> 39079265 ± 6% -20.9% 30915354 ± 4% perf-stat.i.branch-misses
> >>> 5093263 ± 4% -23.7% 3884752 ± 9% perf-stat.i.cache-misses
> >>> 29213 -18.7% 23764 ± 5% perf-stat.i.context-switches
> >>> 7.666e+09 ± 4% +5.7% 8.106e+09 ± 2% perf-stat.i.cpu-cycles
> >>> 1877 ± 15% +75.1% 3287 ± 12% perf-stat.i.cycles-between-cache-misses
> >>> 1735450 ± 3% -12.9% 1512060 ± 3% perf-stat.i.iTLB-load-misses
> >>> 2898 ± 3% +34.4% 3895 ± 7% perf-stat.i.instructions-per-iTLB-miss
> >>> 1493 -20.3% 1190 ± 7% perf-stat.i.major-faults
> >>> 0.09 ± 3% +5.8% 0.09 ± 2% perf-stat.i.metric.GHz
> >>> 48.47 ± 11% +8.4 56.83 ± 7% perf-stat.i.node-store-miss-rate%
> >>> 283426 ± 4% -21.6% 222190 ± 10% perf-stat.i.node-stores
> >>> 3.57 ± 7% -1.1 2.44 ± 6% perf-stat.overall.branch-miss-rate%
> >>> 1508 ± 3% +39.8% 2108 ± 9% perf-stat.overall.cycles-between-cache-misses
> >>> 3022 ± 3% +23.6% 3736 ± 5% perf-stat.overall.instructions-per-iTLB-miss
> >>> 9.585e+08 +18.8% 1.138e+09 ± 6% perf-stat.ps.branch-instructions
> >>> 34151514 ± 6% -18.8% 27725316 ± 4% perf-stat.ps.branch-misses
> >>> 4450329 ± 5% -21.7% 3486409 ± 9% perf-stat.ps.cache-misses
> >>> 25524 -16.4% 21333 ± 4% perf-stat.ps.context-switches
> >>> 77139 +2.5% 79105 perf-stat.ps.cpu-clock
> >>> 6.704e+09 ± 4% +8.7% 7.287e+09 perf-stat.ps.cpu-cycles
> >>> 1.06e+09 +11.3% 1.18e+09 ± 5% perf-stat.ps.dTLB-loads
> >>> 1517349 ± 3% -10.5% 1357716 ± 2% perf-stat.ps.iTLB-load-misses
> >>> 4.582e+09 +10.8% 5.075e+09 ± 6% perf-stat.ps.instructions
> >>> 1296 -18.1% 1061 ± 6% perf-stat.ps.major-faults
> >>> 247613 ± 4% -19.5% 199283 ± 9% perf-stat.ps.node-stores
> >>> 77139 +2.5% 79105 perf-stat.ps.task-clock
> >>> 3.697e+10 +35.3% 5.003e+10 perf-stat.total.instructions
> >>> 8.51 ± 91% -6.9 1.59 ±223% perf-profile.calltrace.cycles-pp.getdents64
> >>> 8.34 ± 83% -6.7 1.67 ±141% perf-profile.calltrace.cycles-pp.exit_to_user_mode_loop.exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
> >>> 6.25 ±107% -6.2 0.00 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.open64
> >>> 6.25 ±107% -6.2 0.00 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.open64
> >>> 6.25 ±107% -6.2 0.00 perf-profile.calltrace.cycles-pp.open64
> >>> 7.63 ± 84% -6.0 1.59 ±223% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.getdents64
> >>> 7.63 ± 84% -6.0 1.59 ±223% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.getdents64
> >>> 7.63 ± 84% -6.0 1.59 ±223% perf-profile.calltrace.cycles-pp.__x64_sys_getdents64.do_syscall_64.entry_SYSCALL_64_after_hwframe.getdents64
> >>> 7.63 ± 84% -6.0 1.59 ±223% perf-profile.calltrace.cycles-pp.iterate_dir.__x64_sys_getdents64.do_syscall_64.entry_SYSCALL_64_after_hwframe.getdents64
> >>> 6.26 ±115% -5.4 0.88 ±223% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
> >>> 6.26 ±115% -5.4 0.88 ±223% perf-profile.calltrace.cycles-pp.exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
> >>> 6.26 ±115% -4.6 1.67 ±141% perf-profile.calltrace.cycles-pp.do_group_exit.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.exit_to_user_mode_prepare
> >>> 6.26 ±115% -4.6 1.67 ±141% perf-profile.calltrace.cycles-pp.do_exit.do_group_exit.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop
> >>> 6.26 ±115% -4.6 1.67 ±141% perf-profile.calltrace.cycles-pp.arch_do_signal_or_restart.exit_to_user_mode_loop.exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64
> >>> 6.26 ±115% -4.6 1.67 ±141% perf-profile.calltrace.cycles-pp.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.exit_to_user_mode_prepare.syscall_exit_to_user_mode
> >>> 4.57 ± 73% -3.8 0.76 ±223% perf-profile.calltrace.cycles-pp.asm_exc_page_fault.perf_mmap__read_head.perf_mmap__push.record__mmap_read_evlist.__cmd_record
> >>> 4.57 ± 73% -3.8 0.76 ±223% perf-profile.calltrace.cycles-pp.exc_page_fault.asm_exc_page_fault.perf_mmap__read_head.perf_mmap__push.record__mmap_read_evlist
> >>> 4.57 ± 73% -3.8 0.76 ±223% perf-profile.calltrace.cycles-pp.do_user_addr_fault.exc_page_fault.asm_exc_page_fault.perf_mmap__read_head.perf_mmap__push
> >>> 4.57 ± 73% -3.8 0.76 ±223% perf-profile.calltrace.cycles-pp.perf_mmap__read_head.perf_mmap__push.record__mmap_read_evlist.__cmd_record.cmd_record
> >>> 3.38 ±103% -3.4 0.00 perf-profile.calltrace.cycles-pp.unmap_vmas.exit_mmap.mmput.exit_mm.do_exit
> >>> 3.38 ±103% -3.4 0.00 perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.exit_mmap.mmput.exit_mm
> >>> 3.38 ±103% -3.4 0.00 perf-profile.calltrace.cycles-pp.zap_pmd_range.unmap_page_range.unmap_vmas.exit_mmap.mmput
> >>> 3.38 ±103% -3.4 0.00 perf-profile.calltrace.cycles-pp.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas.exit_mmap
> >>> 8.51 ± 91% -6.9 1.59 ±223% perf-profile.children.cycles-pp.getdents64
> >>> 8.34 ± 83% -6.7 1.67 ±141% perf-profile.children.cycles-pp.exit_to_user_mode_prepare
> >>> 8.34 ± 83% -6.7 1.67 ±141% perf-profile.children.cycles-pp.exit_to_user_mode_loop
> >>> 8.34 ± 83% -6.7 1.67 ±141% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
> >>> 6.25 ±107% -6.2 0.00 perf-profile.children.cycles-pp.open64
> >>> 7.63 ± 84% -6.0 1.59 ±223% perf-profile.children.cycles-pp.__x64_sys_getdents64
> >>> 7.63 ± 84% -6.0 1.59 ±223% perf-profile.children.cycles-pp.iterate_dir
> >>> 6.26 ±115% -4.6 1.67 ±141% perf-profile.children.cycles-pp.arch_do_signal_or_restart
> >>> 6.26 ±115% -4.6 1.67 ±141% perf-profile.children.cycles-pp.get_signal
> >>> 4.57 ± 73% -3.8 0.76 ±223% perf-profile.children.cycles-pp.perf_mmap__read_head
> >>> 3.38 ±103% -3.4 0.00 perf-profile.children.cycles-pp.unmap_vmas
> >>> 3.38 ±103% -3.4 0.00 perf-profile.children.cycles-pp.unmap_page_range
> >>> 3.38 ±103% -3.4 0.00 perf-profile.children.cycles-pp.zap_pmd_range
> >>> 3.38 ±103% -3.4 0.00 perf-profile.children.cycles-pp.zap_pte_range
> >>> 8.54 ± 43% +8.6 17.19 ± 38% perf-profile.children.cycles-pp.asm_exc_page_fault
> >>>
> >>>
> >>> If you fix the issue, kindly add following tag
> >>> Reported-by: kernel test robot <yujie.liu@xxxxxxxxx>
> >>>
> >>>
> >>> To reproduce:
> >>>
> >>> git clone https://github.com/intel/lkp-tests.git
> >>> cd lkp-tests
> >>> sudo 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
> >>> sudo bin/lkp run generated-yaml-file
> >>>
> >>> # if come across any failure that blocks the test,
> >>> # please remove ~/.lkp and /lkp dir to run from a clean state.
> >>>
> >>>
> >>> 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.
> >>>
> >>>
> >>> #regzbot introduced: 5efdd9122e
> >>>
> >>>
> >
> >
> >
--
Thanks,
Steve