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+2+tWqZYh+Ln5rgWwuu/7xUJCkGjL1BWYuqjKwowXAb/WF/jgxK2zO4n4R8VxR8JYUJrJlhizFYfWlyOH6GXTQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR11MB5022 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 2.1% improvement of aim7.jobs-per-min on: commit: 61b82dfb6b7e1f951fd1e95198a2aee2ccf6a167 ("sched/fair: Do not try to migrate delayed dequeue task") https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git sched/core testcase: aim7 config: x86_64-rhel-9.4 compiler: gcc-12 test machine: 128 threads 2 sockets Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz (Ice Lake) with 256G memory parameters: disk: 1BRD_48G fs: xfs test: sync_disk_rw load: 600 cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250107/202501072048.6f381b3a-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/disk/fs/kconfig/load/rootfs/tbox_group/test/testcase: gcc-12/performance/1BRD_48G/xfs/x86_64-rhel-9.4/600/debian-12-x86_64-20240206.cgz/lkp-icl-2sp2/sync_disk_rw/aim7 commit: 736c55a02c ("sched/fair: Rename cfs_rq.nr_running into nr_queued") 61b82dfb6b ("sched/fair: Do not try to migrate delayed dequeue task") 736c55a02c477ad3 61b82dfb6b7e1f951fd1e95198a ---------------- --------------------------- %stddev %change %stddev \ | \ 0.05 ± 31% +0.2 0.20 ±140% mpstat.cpu.all.iowait% 21.83 ± 18% -51.5% 10.58 ± 79% sched_debug.cfs_rq:/.load_avg.min 38.33 +1.9% 39.07 iostat.cpu.idle 60.71 -1.5% 59.80 iostat.cpu.system 47551 +2.1% 48556 aim7.jobs-per-min 7398 -2.0% 7250 aim7.time.percent_of_cpu_this_job_got 5583 -4.1% 5357 aim7.time.system_time 34860959 -1.5% 34349280 aim7.time.voluntary_context_switches 1.91 +2.6% 1.96 perf-stat.i.MPKI 1.319e+08 +2.1% 1.347e+08 perf-stat.i.cache-misses 837578 +1.7% 851427 perf-stat.i.context-switches 2.132e+11 -1.6% 2.099e+11 perf-stat.i.cpu-cycles 177061 -3.6% 170730 perf-stat.i.cpu-migrations 0.45 ± 2% +2.4% 0.46 perf-stat.i.ipc 2.13 +2.8% 2.19 perf-stat.overall.MPKI 1618 -3.6% 1560 perf-stat.overall.cycles-between-cache-misses 1.301e+08 +2.2% 1.331e+08 perf-stat.ps.cache-misses 826542 +1.7% 840923 perf-stat.ps.context-switches 2.106e+11 -1.4% 2.077e+11 perf-stat.ps.cpu-cycles 174640 -3.5% 168471 perf-stat.ps.cpu-migrations 4.691e+12 -2.2% 4.587e+12 perf-stat.total.instructions 0.27 ± 6% -15.9% 0.22 ± 7% perf-sched.sch_delay.avg.ms.__cond_resched.down_write.xfs_ilock_for_iomap.xfs_buffered_write_iomap_begin.iomap_iter 0.14 ± 76% -99.8% 0.00 ±223% perf-sched.sch_delay.avg.ms.__cond_resched.kmem_cache_alloc_noprof.alloc_empty_file.path_openat.do_filp_open 0.08 ± 2% -14.7% 0.07 ± 2% perf-sched.sch_delay.avg.ms.io_schedule.folio_wait_bit_common.folio_wait_writeback.__filemap_fdatawait_range 0.08 ± 4% -14.3% 0.07 ± 3% perf-sched.sch_delay.avg.ms.schedule_timeout.__wait_for_common.__flush_workqueue.xlog_cil_push_now.isra 0.01 ± 52% -52.7% 0.01 ± 26% perf-sched.sch_delay.avg.ms.wait_for_partner.fifo_open.do_dentry_open.vfs_open 0.16 ± 85% -99.8% 0.00 ±223% perf-sched.sch_delay.max.ms.__cond_resched.kmem_cache_alloc_noprof.alloc_empty_file.path_openat.do_filp_open 1.62 ± 45% -53.6% 0.75 ± 14% perf-sched.sch_delay.max.ms.__cond_resched.writeback_get_folio.writeback_iter.iomap_writepages.xfs_vm_writepages 0.02 ± 15% +130.5% 0.04 ± 58% perf-sched.sch_delay.max.ms.schedule_timeout.kcompactd.kthread.ret_from_fork 0.21 ±105% -88.3% 0.02 ± 64% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.vfs_open 0.07 ± 4% -12.0% 0.06 ± 2% perf-sched.total_sch_delay.average.ms 750.06 ± 6% -11.1% 666.52 ± 18% perf-sched.wait_and_delay.avg.ms.__x64_sys_pause.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown] 168.85 ±141% +205.4% 515.61 perf-sched.wait_and_delay.avg.ms.do_task_dead.do_exit.__x64_sys_exit.x64_sys_call.do_syscall_64 31.35 ± 7% -10.6% 28.01 perf-sched.wait_and_delay.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call 832.00 ± 17% +20.6% 1003 ± 4% perf-sched.wait_and_delay.count.__cond_resched.__wait_for_common.affine_move_task.__set_cpus_allowed_ptr.__sched_setaffinity 2113 ± 10% +15.7% 2445 ± 2% perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm 75.84 ± 18% -14.9% 64.53 ± 4% perf-sched.wait_and_delay.max.ms.__cond_resched.__wait_for_common.__flush_workqueue.xlog_cil_push_now.isra 168.85 ±141% +205.4% 515.61 perf-sched.wait_and_delay.max.ms.do_task_dead.do_exit.__x64_sys_exit.x64_sys_call.do_syscall_64 1.15 ± 9% -33.4% 0.77 ± 24% perf-sched.wait_time.avg.ms.__cond_resched.__wait_for_common.wait_for_completion_state.kernel_clone.__x64_sys_vfork 0.96 ± 17% -25.9% 0.71 ± 7% perf-sched.wait_time.avg.ms.__cond_resched.writeback_get_folio.writeback_iter.iomap_writepages.xfs_vm_writepages 168.85 ±141% +205.4% 515.61 perf-sched.wait_time.avg.ms.do_task_dead.do_exit.__x64_sys_exit.x64_sys_call.do_syscall_64 31.35 ± 7% -10.6% 28.01 perf-sched.wait_time.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call 9.88 ±118% -76.9% 2.28 ± 55% perf-sched.wait_time.max.ms.__cond_resched.writeback_get_folio.writeback_iter.iomap_writepages.xfs_vm_writepages 168.85 ±141% +205.4% 515.61 perf-sched.wait_time.max.ms.do_task_dead.do_exit.__x64_sys_exit.x64_sys_call.do_syscall_64 226.05 ±153% -70.8% 65.98 ± 4% perf-sched.wait_time.max.ms.schedule_preempt_disabled.__mutex_lock.constprop.0.__flush_workqueue 333.54 ±141% -100.0% 0.02 ± 64% perf-sched.wait_time.max.ms.wait_for_partner.fifo_open.do_dentry_open.vfs_open 70.43 -1.1 69.31 perf-profile.calltrace.cycles-pp.__mutex_lock.__flush_workqueue.xlog_cil_push_now.xlog_cil_force_seq.xfs_log_force_seq 68.32 -1.1 67.21 perf-profile.calltrace.cycles-pp.osq_lock.__mutex_lock.__flush_workqueue.xlog_cil_push_now.xlog_cil_force_seq 74.65 -1.0 73.63 perf-profile.calltrace.cycles-pp.__flush_workqueue.xlog_cil_push_now.xlog_cil_force_seq.xfs_log_force_seq.xfs_file_fsync 81.36 -1.0 80.34 perf-profile.calltrace.cycles-pp.xfs_log_force_seq.xfs_file_fsync.xfs_file_buffered_write.vfs_write.ksys_write 75.60 -1.0 74.61 perf-profile.calltrace.cycles-pp.xlog_cil_push_now.xlog_cil_force_seq.xfs_log_force_seq.xfs_file_fsync.xfs_file_buffered_write 77.63 -1.0 76.66 perf-profile.calltrace.cycles-pp.xlog_cil_force_seq.xfs_log_force_seq.xfs_file_fsync.xfs_file_buffered_write.vfs_write 90.80 -0.4 90.38 perf-profile.calltrace.cycles-pp.xfs_file_fsync.xfs_file_buffered_write.vfs_write.ksys_write.do_syscall_64 93.24 -0.3 92.92 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write 93.52 -0.3 93.20 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write 93.27 -0.3 92.95 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write 93.52 -0.3 93.21 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write 93.12 -0.3 92.81 perf-profile.calltrace.cycles-pp.xfs_file_buffered_write.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe 93.75 -0.3 93.44 perf-profile.calltrace.cycles-pp.write 0.52 +0.0 0.56 perf-profile.calltrace.cycles-pp.__sysvec_call_function_single.sysvec_call_function_single.asm_sysvec_call_function_single.acpi_safe_halt.acpi_idle_do_entry 0.64 +0.0 0.68 perf-profile.calltrace.cycles-pp.sysvec_call_function_single.asm_sysvec_call_function_single.acpi_safe_halt.acpi_idle_do_entry.acpi_idle_enter 0.96 +0.0 1.00 perf-profile.calltrace.cycles-pp.iomap_write_iter.iomap_file_buffered_write.xfs_file_buffered_write.vfs_write.ksys_write 1.24 +0.0 1.29 perf-profile.calltrace.cycles-pp.iomap_file_buffered_write.xfs_file_buffered_write.vfs_write.ksys_write.do_syscall_64 0.88 +0.1 0.93 perf-profile.calltrace.cycles-pp.acpi_safe_halt.acpi_idle_do_entry.acpi_idle_enter.cpuidle_enter_state.cpuidle_enter 0.85 +0.1 0.92 ± 4% perf-profile.calltrace.cycles-pp.xfs_iomap_write_unwritten.xfs_end_ioend.xfs_end_io.process_one_work.worker_thread 1.10 ± 5% +0.1 1.17 ± 3% perf-profile.calltrace.cycles-pp.__folio_end_writeback.folio_end_writeback.iomap_finish_ioend.iomap_finish_ioends.xfs_end_ioend 1.31 ± 3% +0.1 1.40 ± 2% perf-profile.calltrace.cycles-pp.iomap_finish_ioends.xfs_end_ioend.xfs_end_io.process_one_work.worker_thread 1.29 ± 3% +0.1 1.38 ± 2% perf-profile.calltrace.cycles-pp.folio_end_writeback.iomap_finish_ioend.iomap_finish_ioends.xfs_end_ioend.xfs_end_io 1.31 ± 3% +0.1 1.40 ± 2% perf-profile.calltrace.cycles-pp.iomap_finish_ioend.iomap_finish_ioends.xfs_end_ioend.xfs_end_io.process_one_work 1.54 +0.1 1.63 perf-profile.calltrace.cycles-pp.acpi_idle_do_entry.acpi_idle_enter.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call 1.55 +0.1 1.64 perf-profile.calltrace.cycles-pp.acpi_idle_enter.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle 1.60 +0.1 1.70 perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry 1.62 +0.1 1.71 perf-profile.calltrace.cycles-pp.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary 2.06 +0.1 2.16 perf-profile.calltrace.cycles-pp.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary.common_startup_64 1.94 +0.1 2.05 perf-profile.calltrace.cycles-pp.asm_sysvec_call_function_single.acpi_safe_halt.acpi_idle_do_entry.acpi_idle_enter.cpuidle_enter_state 0.42 ± 44% +0.1 0.54 perf-profile.calltrace.cycles-pp.__flush_smp_call_function_queue.__sysvec_call_function_single.sysvec_call_function_single.asm_sysvec_call_function_single.acpi_safe_halt 2.46 +0.1 2.58 perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.common_startup_64 2.46 +0.1 2.59 perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.common_startup_64 2.46 +0.1 2.59 perf-profile.calltrace.cycles-pp.start_secondary.common_startup_64 2.49 +0.1 2.62 perf-profile.calltrace.cycles-pp.common_startup_64 2.18 ± 2% +0.2 2.33 ± 2% perf-profile.calltrace.cycles-pp.xfs_end_io.process_one_work.worker_thread.kthread.ret_from_fork 2.17 ± 2% +0.2 2.32 ± 2% perf-profile.calltrace.cycles-pp.xfs_end_ioend.xfs_end_io.process_one_work.worker_thread.kthread 2.92 +0.2 3.08 ± 2% perf-profile.calltrace.cycles-pp.process_one_work.worker_thread.kthread.ret_from_fork.ret_from_fork_asm 3.22 +0.2 3.38 perf-profile.calltrace.cycles-pp.worker_thread.kthread.ret_from_fork.ret_from_fork_asm 3.23 +0.2 3.40 perf-profile.calltrace.cycles-pp.kthread.ret_from_fork.ret_from_fork_asm 3.23 +0.2 3.40 perf-profile.calltrace.cycles-pp.ret_from_fork.ret_from_fork_asm 3.23 +0.2 3.40 perf-profile.calltrace.cycles-pp.ret_from_fork_asm 3.58 ± 5% +0.2 3.83 ± 3% perf-profile.calltrace.cycles-pp.__folio_end_writeback.folio_end_writeback.iomap_finish_ioend.__submit_bio.__submit_bio_noacct 3.71 ± 5% +0.3 3.97 ± 3% perf-profile.calltrace.cycles-pp.folio_end_writeback.iomap_finish_ioend.__submit_bio.__submit_bio_noacct.iomap_submit_ioend 3.74 ± 5% +0.3 4.00 ± 3% perf-profile.calltrace.cycles-pp.iomap_finish_ioend.__submit_bio.__submit_bio_noacct.iomap_submit_ioend.iomap_writepages 4.46 ± 4% +0.3 4.75 ± 2% perf-profile.calltrace.cycles-pp.iomap_submit_ioend.iomap_writepages.xfs_vm_writepages.do_writepages.filemap_fdatawrite_wbc 4.41 ± 4% +0.3 4.70 ± 2% perf-profile.calltrace.cycles-pp.__submit_bio_noacct.iomap_submit_ioend.iomap_writepages.xfs_vm_writepages.do_writepages 4.40 ± 4% +0.3 4.69 ± 2% perf-profile.calltrace.cycles-pp.__submit_bio.__submit_bio_noacct.iomap_submit_ioend.iomap_writepages.xfs_vm_writepages 8.96 ± 5% +0.6 9.55 ± 3% perf-profile.calltrace.cycles-pp.do_writepages.filemap_fdatawrite_wbc.__filemap_fdatawrite_range.file_write_and_wait_range.xfs_file_fsync 9.01 ± 5% +0.6 9.60 ± 3% perf-profile.calltrace.cycles-pp.filemap_fdatawrite_wbc.__filemap_fdatawrite_range.file_write_and_wait_range.xfs_file_fsync.xfs_file_buffered_write 8.92 ± 5% +0.6 9.51 ± 3% perf-profile.calltrace.cycles-pp.iomap_writepages.xfs_vm_writepages.do_writepages.filemap_fdatawrite_wbc.__filemap_fdatawrite_range 9.02 ± 5% +0.6 9.61 ± 3% perf-profile.calltrace.cycles-pp.__filemap_fdatawrite_range.file_write_and_wait_range.xfs_file_fsync.xfs_file_buffered_write.vfs_write 8.94 ± 5% +0.6 9.53 ± 3% perf-profile.calltrace.cycles-pp.xfs_vm_writepages.do_writepages.filemap_fdatawrite_wbc.__filemap_fdatawrite_range.file_write_and_wait_range 9.28 ± 5% +0.6 9.88 ± 3% perf-profile.calltrace.cycles-pp.file_write_and_wait_range.xfs_file_fsync.xfs_file_buffered_write.vfs_write.ksys_write 70.43 -1.1 69.31 perf-profile.children.cycles-pp.__mutex_lock 68.34 -1.1 67.23 perf-profile.children.cycles-pp.osq_lock 74.66 -1.0 73.63 perf-profile.children.cycles-pp.__flush_workqueue 81.36 -1.0 80.34 perf-profile.children.cycles-pp.xfs_log_force_seq 75.60 -1.0 74.61 perf-profile.children.cycles-pp.xlog_cil_push_now 77.64 -1.0 76.66 perf-profile.children.cycles-pp.xlog_cil_force_seq 90.80 -0.4 90.38 perf-profile.children.cycles-pp.xfs_file_fsync 93.30 -0.3 92.98 perf-profile.children.cycles-pp.ksys_write 93.27 -0.3 92.95 perf-profile.children.cycles-pp.vfs_write 93.13 -0.3 92.81 perf-profile.children.cycles-pp.xfs_file_buffered_write 93.82 -0.3 93.51 perf-profile.children.cycles-pp.write 93.81 -0.3 93.51 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe 93.78 -0.3 93.49 perf-profile.children.cycles-pp.do_syscall_64 0.20 +0.0 0.21 perf-profile.children.cycles-pp.writeback_iter 0.31 +0.0 0.33 ± 2% perf-profile.children.cycles-pp.iomap_write_begin 0.69 +0.0 0.71 perf-profile.children.cycles-pp.ttwu_do_activate 0.35 +0.0 0.37 perf-profile.children.cycles-pp.iomap_write_end 0.55 +0.0 0.58 perf-profile.children.cycles-pp.sched_ttwu_pending 0.64 +0.0 0.66 perf-profile.children.cycles-pp.__flush_smp_call_function_queue 0.65 +0.0 0.68 perf-profile.children.cycles-pp.__sysvec_call_function_single 0.79 +0.0 0.82 perf-profile.children.cycles-pp.sysvec_call_function_single 0.96 +0.0 1.00 perf-profile.children.cycles-pp.iomap_write_iter 1.24 +0.0 1.29 perf-profile.children.cycles-pp.iomap_file_buffered_write 1.18 ± 2% +0.1 1.23 ± 2% perf-profile.children.cycles-pp.__xfs_trans_commit 1.48 +0.1 1.54 perf-profile.children.cycles-pp.asm_sysvec_call_function_single 0.85 +0.1 0.92 ± 4% perf-profile.children.cycles-pp.xfs_iomap_write_unwritten 1.31 ± 3% +0.1 1.40 ± 2% perf-profile.children.cycles-pp.iomap_finish_ioends 1.57 +0.1 1.66 perf-profile.children.cycles-pp.acpi_idle_enter 1.57 +0.1 1.66 perf-profile.children.cycles-pp.acpi_safe_halt 1.63 +0.1 1.72 perf-profile.children.cycles-pp.cpuidle_enter_state 1.64 +0.1 1.73 perf-profile.children.cycles-pp.cpuidle_enter 1.57 +0.1 1.66 perf-profile.children.cycles-pp.acpi_idle_do_entry 2.08 +0.1 2.19 perf-profile.children.cycles-pp.cpuidle_idle_call 2.49 +0.1 2.62 perf-profile.children.cycles-pp.do_idle 2.46 +0.1 2.59 perf-profile.children.cycles-pp.start_secondary 2.49 +0.1 2.62 perf-profile.children.cycles-pp.common_startup_64 2.49 +0.1 2.62 perf-profile.children.cycles-pp.cpu_startup_entry 2.17 ± 2% +0.2 2.32 ± 2% perf-profile.children.cycles-pp.xfs_end_ioend 2.18 ± 2% +0.2 2.34 ± 2% perf-profile.children.cycles-pp.xfs_end_io 2.92 +0.2 3.08 ± 2% perf-profile.children.cycles-pp.process_one_work 3.24 +0.2 3.40 perf-profile.children.cycles-pp.ret_from_fork 3.24 +0.2 3.40 perf-profile.children.cycles-pp.ret_from_fork_asm 3.23 +0.2 3.40 perf-profile.children.cycles-pp.kthread 3.22 +0.2 3.39 perf-profile.children.cycles-pp.worker_thread 4.46 ± 4% +0.3 4.75 ± 2% perf-profile.children.cycles-pp.iomap_submit_ioend 4.46 ± 4% +0.3 4.75 ± 2% perf-profile.children.cycles-pp.__submit_bio_noacct 4.46 ± 4% +0.3 4.74 ± 2% perf-profile.children.cycles-pp.__submit_bio 4.68 ± 5% +0.3 5.01 ± 3% perf-profile.children.cycles-pp.__folio_end_writeback 5.00 ± 5% +0.3 5.34 ± 3% perf-profile.children.cycles-pp.folio_end_writeback 5.05 ± 5% +0.3 5.40 ± 3% perf-profile.children.cycles-pp.iomap_finish_ioend 8.96 ± 5% +0.6 9.55 ± 3% perf-profile.children.cycles-pp.do_writepages 9.01 ± 5% +0.6 9.60 ± 3% perf-profile.children.cycles-pp.filemap_fdatawrite_wbc 9.02 ± 5% +0.6 9.61 ± 3% perf-profile.children.cycles-pp.__filemap_fdatawrite_range 8.94 ± 5% +0.6 9.53 ± 3% perf-profile.children.cycles-pp.xfs_vm_writepages 8.92 ± 5% +0.6 9.52 ± 3% perf-profile.children.cycles-pp.iomap_writepages 9.28 ± 5% +0.6 9.88 ± 3% perf-profile.children.cycles-pp.file_write_and_wait_range 67.44 -1.1 66.35 perf-profile.self.cycles-pp.osq_lock 0.21 +0.0 0.22 perf-profile.self.cycles-pp.iomap_set_range_uptodate 0.64 +0.0 0.66 perf-profile.self.cycles-pp._raw_spin_lock_irqsave 0.75 +0.0 0.79 perf-profile.self.cycles-pp.acpi_safe_halt 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