| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <202503311019.7d50fa1b-lkp@intel.com>
Date: Mon, 31 Mar 2025 10:57:45 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Mateusz Guzik <mjguzik@...il.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
Christian Brauner <brauner@...nel.org>, <oliver.sang@...el.com>
Subject: [linus:master] [wait] 84654c7f47: reaim.jobs_per_min 3.0%
regression
Hello,
kernel test robot noticed a 3.0% regression of reaim.jobs_per_min on:
commit: 84654c7f47307692d47ea914d01287c8c54b3532 ("wait: avoid spurious calls to prepare_to_wait_event() in ___wait_event()")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
[still regression on linus/master 1a9239bb4253f9076b5b4b2a1a4e8d7defd77a95]
[still regreasion on linux-next/master db8da9da41bced445077925f8a886c776a47440c]
testcase: reaim
config: x86_64-rhel-9.4
compiler: gcc-12
test machine: 192 threads 2 sockets Intel(R) Xeon(R) Platinum 8468V CPU @ 2.4GHz (Sapphire Rapids) with 384G memory
parameters:
runtime: 300s
nr_task: 100%
disk: 1SSD
fs: ext4
test: disk
cpufreq_governor: performance
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202503311019.7d50fa1b-lkp@intel.com
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250331/202503311019.7d50fa1b-lkp@intel.com
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase:
gcc-12/performance/1SSD/ext4/x86_64-rhel-9.4/100%/debian-12-x86_64-20240206.cgz/300s/igk-spr-2sp4/disk/reaim
commit:
46af8e2406 ("pipe: cache 2 pages instead of 1")
84654c7f47 ("wait: avoid spurious calls to prepare_to_wait_event() in ___wait_event()")
46af8e2406c27cc2 84654c7f47307692d47ea914d01
---------------- ---------------------------
%stddev %change %stddev
\ | \
20.32 ± 2% -3.2 17.17 mpstat.cpu.all.sys%
54.24 ± 2% -11.8% 47.82 ± 3% mpstat.max_utilization_pct
178465 ± 12% +26.3% 225351 ± 10% sched_debug.cfs_rq:/.avg_vruntime.stddev
178465 ± 12% +26.3% 225351 ± 10% sched_debug.cfs_rq:/.min_vruntime.stddev
10320 ± 15% +36.8% 14113 ± 6% sched_debug.cpu.nr_switches.stddev
75.63 +4.3% 78.87 iostat.cpu.idle
2.05 -2.9% 1.99 iostat.cpu.iowait
21.28 ± 2% -14.8% 18.12 iostat.cpu.system
1.04 -2.7% 1.01 iostat.cpu.user
7205 -1.5% 7100 vmstat.io.bi
42.24 ± 4% -10.1% 37.99 ± 5% vmstat.procs.r
268438 -4.9% 255319 vmstat.system.cs
176126 -3.0% 170917 vmstat.system.in
463695 +5.7% 490115 ± 2% proc-vmstat.nr_active_anon
1309918 +2.1% 1337119 proc-vmstat.nr_file_pages
269292 +9.9% 296064 ± 4% proc-vmstat.nr_shmem
65965 +1.0% 66627 proc-vmstat.nr_slab_reclaimable
463695 +5.7% 490115 ± 2% proc-vmstat.nr_zone_active_anon
2.171e+08 -1.7% 2.134e+08 proc-vmstat.pgfault
151.15 ± 2% -14.3% 129.47 reaim.child_systime
6.80 +2.2% 6.95 reaim.child_utime
606391 -3.0% 588044 reaim.jobs_per_min
3158 -3.0% 3062 reaim.jobs_per_min_child
628950 -2.7% 611916 reaim.max_jobs_per_min
1.90 +3.1% 1.96 reaim.parent_time
50558551 -1.7% 49692848 reaim.time.file_system_outputs
2051317 -8.8% 1871021 reaim.time.involuntary_context_switches
164148 -8.4% 150417 reaim.time.major_page_faults
2.155e+08 -1.7% 2.119e+08 reaim.time.minor_page_faults
4004 -14.9% 3407 reaim.time.percent_of_cpu_this_job_got
11615 -15.8% 9783 reaim.time.system_time
34429088 -5.5% 32518423 reaim.time.voluntary_context_switches
8.196e+09 -8.7% 7.481e+09 perf-stat.i.branch-instructions
1.69 ± 2% +0.1 1.78 perf-stat.i.branch-miss-rate%
1.442e+08 -2.5% 1.405e+08 perf-stat.i.branch-misses
1.015e+08 -2.3% 99100519 perf-stat.i.cache-misses
5.171e+08 -3.6% 4.984e+08 perf-stat.i.cache-references
272535 -5.0% 258840 perf-stat.i.context-switches
3.31 -4.5% 3.16 perf-stat.i.cpi
1.314e+11 ± 2% -13.7% 1.134e+11 perf-stat.i.cpu-cycles
31541 -11.9% 27772 perf-stat.i.cpu-migrations
1274 -8.7% 1163 perf-stat.i.cycles-between-cache-misses
3.997e+10 -8.6% 3.655e+10 perf-stat.i.instructions
0.34 +4.0% 0.36 perf-stat.i.ipc
542.30 -8.3% 497.24 perf-stat.i.major-faults
8.47 -2.4% 8.27 perf-stat.i.metric.K/sec
696934 -1.6% 685700 perf-stat.i.minor-faults
697476 -1.6% 686197 perf-stat.i.page-faults
0.02 ± 4% -13.1% 0.01 ± 4% perf-sched.sch_delay.avg.ms.__cond_resched.stop_one_cpu.sched_exec.bprm_execve.part
0.02 ± 6% -25.2% 0.02 ± 13% perf-sched.sch_delay.avg.ms.anon_pipe_read.fifo_pipe_read.vfs_read.ksys_read
0.02 ± 17% -47.2% 0.01 ± 24% perf-sched.sch_delay.avg.ms.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll
0.01 ± 38% +134.3% 0.02 ± 29% perf-sched.sch_delay.avg.ms.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.do_unlinkat
0.01 ± 19% +71.6% 0.01 ± 21% perf-sched.sch_delay.avg.ms.wait_transaction_locked.add_transaction_credits.start_this_handle.jbd2__journal_start
0.24 ± 38% +558.1% 1.55 ± 98% perf-sched.sch_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
1.42 ± 34% +513.4% 8.72 ± 59% perf-sched.sch_delay.max.ms.do_wait.kernel_wait4.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.44 ±213% +966.4% 26.02 ± 31% perf-sched.sch_delay.max.ms.io_schedule.bit_wait_io.__wait_on_bit.out_of_line_wait_on_bit
1.23 ±186% +833.2% 11.51 ± 74% perf-sched.sch_delay.max.ms.io_schedule.bit_wait_io.__wait_on_bit_lock.out_of_line_wait_on_bit_lock
2.54 ±196% +700.3% 20.32 ± 25% perf-sched.sch_delay.max.ms.io_schedule.folio_wait_bit_common.folio_wait_writeback.__filemap_fdatawait_range
0.77 ± 78% +1333.4% 10.99 ± 43% perf-sched.sch_delay.max.ms.schedule_preempt_disabled.__mutex_lock.constprop.0.sync_bdevs
2.42 ±235% +1056.6% 27.94 ± 23% perf-sched.sch_delay.max.ms.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.open_last_lookups
3.76 ±217% +668.9% 28.92 ± 23% perf-sched.sch_delay.max.ms.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
2.76 ±210% +925.0% 28.30 ± 30% perf-sched.sch_delay.max.ms.wait_transaction_locked.add_transaction_credits.start_this_handle.jbd2__journal_start
5.73 ± 4% +16.7% 6.68 ± 3% perf-sched.total_wait_and_delay.average.ms
541419 ± 3% +26.2% 683124 ± 7% perf-sched.total_wait_and_delay.count.ms
5.72 ± 4% +16.6% 6.67 ± 3% perf-sched.total_wait_time.average.ms
0.02 ± 3% -12.8% 0.02 ± 3% perf-sched.wait_and_delay.avg.ms.__cond_resched.stop_one_cpu.sched_exec.bprm_execve.part
0.09 ± 6% -17.4% 0.07 ± 4% perf-sched.wait_and_delay.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call
1.54 ± 7% +33.8% 2.06 ± 4% perf-sched.wait_and_delay.avg.ms.io_schedule.folio_wait_bit_common.folio_wait_writeback.__filemap_fdatawait_range
1.55 ± 8% +53.9% 2.39 ± 7% perf-sched.wait_and_delay.avg.ms.jbd2_log_wait_commit.ext4_sync_fs.iterate_supers.ksys_sync
290.01 ± 17% -64.0% 104.50 ± 6% perf-sched.wait_and_delay.avg.ms.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll
182.38 ± 3% +14.6% 208.99 ± 6% perf-sched.wait_and_delay.avg.ms.schedule_hrtimeout_range.ep_poll.do_epoll_wait.__x64_sys_epoll_wait
0.66 ± 23% +34.4% 0.89 ± 4% perf-sched.wait_and_delay.avg.ms.schedule_preempt_disabled.__mutex_lock.constprop.0.wait_sb_inodes
4.16 ± 8% +21.2% 5.04 ± 5% perf-sched.wait_and_delay.avg.ms.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.do_unlinkat
19.47 ± 8% -25.2% 14.56 ± 5% perf-sched.wait_and_delay.avg.ms.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.open_last_lookups
2.50 ± 8% +55.9% 3.89 ± 3% perf-sched.wait_and_delay.avg.ms.schedule_timeout.__wait_for_common.__flush_workqueue.ext4_sync_fs
30.55 ± 20% +37.9% 42.14 perf-sched.wait_and_delay.avg.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
146.67 ± 34% +157.6% 377.82 ± 18% perf-sched.wait_and_delay.count.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
18593 +25.0% 23245 ± 7% perf-sched.wait_and_delay.count.__cond_resched.stop_one_cpu.sched_exec.bprm_execve.part
379.25 ± 13% -46.4% 203.09 perf-sched.wait_and_delay.count.__x64_sys_pause.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
38979 +34.8% 52534 ± 6% perf-sched.wait_and_delay.count.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call
38945 +34.4% 52357 ± 6% perf-sched.wait_and_delay.count.do_wait.kernel_wait4.do_syscall_64.entry_SYSCALL_64_after_hwframe
20923 ± 2% +12.5% 23539 ± 6% perf-sched.wait_and_delay.count.io_schedule.bit_wait_io.__wait_on_bit.out_of_line_wait_on_bit
3951 ± 3% +17.1% 4627 ± 8% perf-sched.wait_and_delay.count.io_schedule.folio_wait_bit_common.filemap_fault.__do_fault
35593 ± 2% +40.6% 50040 ± 5% perf-sched.wait_and_delay.count.io_schedule.folio_wait_bit_common.folio_wait_writeback.__filemap_fdatawait_range
170.83 ± 45% +51.1% 258.09 ± 10% perf-sched.wait_and_delay.count.irqentry_exit_to_user_mode.asm_exc_page_fault.[unknown].[unknown]
33097 +34.0% 44350 ± 6% perf-sched.wait_and_delay.count.jbd2_log_wait_commit.ext4_sync_fs.iterate_supers.ksys_sync
113.50 ± 6% +68.1% 190.82 ± 6% perf-sched.wait_and_delay.count.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll
8426 ± 3% +85.5% 15629 ± 7% perf-sched.wait_and_delay.count.schedule_preempt_disabled.__mutex_lock.constprop.0.sync_bdevs
16359 ± 2% +43.7% 23512 ± 6% perf-sched.wait_and_delay.count.schedule_preempt_disabled.__mutex_lock.constprop.0.wait_sb_inodes
12226 ± 2% +22.8% 15015 ± 8% perf-sched.wait_and_delay.count.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.do_unlinkat
9463 ± 2% +65.4% 15654 ± 8% perf-sched.wait_and_delay.count.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.open_last_lookups
8482 ± 4% +28.0% 10855 ± 7% perf-sched.wait_and_delay.count.schedule_timeout.__wait_for_common.__flush_workqueue.ext4_sync_fs
38705 +34.4% 52015 ± 6% perf-sched.wait_and_delay.count.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
43408 +33.0% 57748 ± 6% perf-sched.wait_and_delay.count.schedule_timeout.io_schedule_timeout.__iomap_dio_rw.iomap_dio_rw
33465 +18.7% 39708 ± 7% perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
11081 ± 5% +82.6% 20239 ± 7% perf-sched.wait_and_delay.count.wait_transaction_locked.add_transaction_credits.start_this_handle.jbd2__journal_start
422.12 ±133% +241.6% 1441 ± 63% perf-sched.wait_and_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
1513 ± 17% +55.5% 2352 perf-sched.wait_and_delay.max.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
2101 ± 23% +104.6% 4299 ± 3% perf-sched.wait_and_delay.max.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
2.80 ± 27% +61.0% 4.50 ± 24% perf-sched.wait_time.avg.ms.__cond_resched.flush_delayed_work.dquot_writeback_dquots.ext4_sync_fs.iterate_supers
2.79 ± 7% +75.9% 4.90 ± 6% perf-sched.wait_time.avg.ms.__cond_resched.super_lock.iterate_supers.ksys_sync.__x64_sys_sync
0.09 ± 6% -17.4% 0.07 ± 4% perf-sched.wait_time.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call
1.53 ± 7% +33.8% 2.05 ± 4% perf-sched.wait_time.avg.ms.io_schedule.folio_wait_bit_common.folio_wait_writeback.__filemap_fdatawait_range
0.72 ± 6% -43.3% 0.41 ± 22% perf-sched.wait_time.avg.ms.jbd2_journal_wait_updates.jbd2_journal_commit_transaction.kjournald2.kthread
1.54 ± 8% +53.9% 2.37 ± 7% perf-sched.wait_time.avg.ms.jbd2_log_wait_commit.ext4_sync_fs.iterate_supers.ksys_sync
289.99 ± 17% -64.0% 104.49 ± 6% perf-sched.wait_time.avg.ms.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll
182.35 ± 3% +14.6% 208.96 ± 6% perf-sched.wait_time.avg.ms.schedule_hrtimeout_range.ep_poll.do_epoll_wait.__x64_sys_epoll_wait
0.65 ± 23% +34.7% 0.87 ± 4% perf-sched.wait_time.avg.ms.schedule_preempt_disabled.__mutex_lock.constprop.0.wait_sb_inodes
4.15 ± 8% +21.0% 5.02 ± 5% perf-sched.wait_time.avg.ms.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.do_unlinkat
19.46 ± 8% -25.3% 14.53 ± 5% perf-sched.wait_time.avg.ms.schedule_preempt_disabled.rwsem_down_write_slowpath.down_write.open_last_lookups
2.49 ± 8% +55.9% 3.88 ± 3% perf-sched.wait_time.avg.ms.schedule_timeout.__wait_for_common.__flush_workqueue.ext4_sync_fs
6.06 ± 2% -8.9% 5.52 ± 4% perf-sched.wait_time.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
30.51 ± 20% +37.9% 42.09 perf-sched.wait_time.avg.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
17.78 ± 15% +523.0% 110.77 ±253% perf-sched.wait_time.max.ms.__cond_resched.exit_mmap.__mmput.exit_mm.do_exit
422.09 ±133% +241.6% 1441 ± 63% perf-sched.wait_time.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
17.56 ± 8% +37.2% 24.09 ± 10% perf-sched.wait_time.max.ms.__cond_resched.super_lock.iterate_supers.ksys_sync.__x64_sys_sync
1513 ± 17% +55.5% 2352 perf-sched.wait_time.max.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
2101 ± 23% +104.6% 4299 ± 3% perf-sched.wait_time.max.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
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.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Powered by blists - more mailing lists