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B9JpPsBEQu8h5oKf3HQvNkyAYeVjmdq6E8runyBrTm08h8EyQTd2Id4zHDR5ksy1Ro5RJgMyP74HJgEJWOnldA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR11MB6738 X-OriginatorOrg: intel.com 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 | 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