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Date: Mon, 28 Mar 2016 14:08:24 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [sched/fair] 3a47d5124a: pigz.throughput -2.8% regression
FYI, we noticed that pigz.throughput -2.8% regression with your commit,
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 3a47d5124a957358274e9ca7b115b2f3a914f56d ("sched/fair: Fix fairness issue on migration")
=========================================================================================
blocksize/compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/testcase:
128K/gcc-4.9/performance/x86_64-rhel/100%/debian-x86_64-2015-02-07.cgz/lkp-snb01/pigz
commit:
2f5177f0fd7e531b26d54633be62d1d4cb94621c
3a47d5124a957358274e9ca7b115b2f3a914f56d
2f5177f0fd7e531b 3a47d5124a957358274e9ca7b1
---------------- --------------------------
fail:runs %reproduction fail:runs
%stddev %change %stddev
\ | \
3.565e+08 ± 0% -2.8% 3.466e+08 ± 0% pigz.throughput
3148624 ± 1% -61.5% 1213138 ± 1% pigz.time.involuntary_context_switches
3172 ± 0% -4.9% 3017 ± 0% pigz.time.percent_of_cpu_this_job_got
108.01 ± 0% -12.7% 94.28 ± 0% pigz.time.system_time
9416 ± 0% -4.8% 8963 ± 0% pigz.time.user_time
4435433 ± 0% -25.4% 3308219 ± 0% pigz.time.voluntary_context_switches
22606 ± 6% -8.5% 20692 ± 0% meminfo.Shmem
6211 ± 51% +65.1% 10253 ± 13% numa-meminfo.node1.AnonHugePages
82109 ± 4% +111.8% 173874 ± 5% softirqs.SCHED
17775779 ± 2% -8.2% 16323423 ± 5% numa-numastat.node0.local_node
17777847 ± 2% -8.2% 16324614 ± 5% numa-numastat.node0.numa_hit
10837718 ± 18% -23.4% 8299086 ± 3% numa-vmstat.node0.numa_hit
10771465 ± 18% -23.6% 8232199 ± 3% numa-vmstat.node0.numa_local
6147 ± 4% +9.7% 6742 ± 4% slabinfo.anon_vma.active_objs
6147 ± 4% +9.7% 6742 ± 4% slabinfo.anon_vma.num_objs
5652 ± 6% -8.5% 5171 ± 0% proc-vmstat.nr_shmem
33999 ± 6% +40.2% 47675 ± 14% proc-vmstat.numa_pages_migrated
33999 ± 6% +40.2% 47675 ± 14% proc-vmstat.pgmigrate_success
3148624 ± 1% -61.5% 1213138 ± 1% time.involuntary_context_switches
108.01 ± 0% -12.7% 94.28 ± 0% time.system_time
4435433 ± 0% -25.4% 3308219 ± 0% time.voluntary_context_switches
0.64 ± 5% +707.0% 5.17 ± 1% turbostat.CPU%c1
0.01 ± 0% +675.0% 0.08 ± 5% turbostat.CPU%c3
16.03 ±101% -99.6% 0.06 ±100% turbostat.Pkg%pc2
14964297 ± 21% +256.4% 53332691 ± 3% cpuidle.C1-SNB.time
58475 ± 5% +229.5% 192657 ± 1% cpuidle.C1-SNB.usage
18841654 ± 15% +709.6% 1.525e+08 ± 2% cpuidle.C1E-SNB.time
66706 ± 10% +629.5% 486650 ± 1% cpuidle.C1E-SNB.usage
4314242 ± 12% +575.3% 29134227 ± 1% cpuidle.C3-SNB.time
14262 ± 10% +543.3% 91745 ± 2% cpuidle.C3-SNB.usage
133764 ± 27% +434.9% 715504 ± 1% cpuidle.C7-SNB.usage
3.929e+08 ± 1% -100.0% 0.00 ± -1% latency_stats.avg.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
9059435 ±103% -100.0% 160.00 ± 44% latency_stats.avg.rpc_wait_bit_killable.__rpc_execute.rpc_execute.rpc_run_task.nfs4_call_sync_sequence.[nfsv4]._nfs4_proc_access.[nfsv4].nfs4_proc_access.[nfsv4].nfs_do_access.nfs_permission.__inode_permission.inode_permission.link_path_walk
4.578e+08 ± 5% -100.0% 0.00 ± -1% latency_stats.max.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
51327106 ±102% -100.0% 257.25 ± 51% latency_stats.max.rpc_wait_bit_killable.__rpc_execute.rpc_execute.rpc_run_task.nfs4_call_sync_sequence.[nfsv4]._nfs4_proc_access.[nfsv4].nfs4_proc_access.[nfsv4].nfs_do_access.nfs_permission.__inode_permission.inode_permission.link_path_walk
7.858e+08 ± 1% -100.0% 0.00 ± -1% latency_stats.sum.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
20816 ± 25% +361.7% 96106 ± 13% latency_stats.sum.pipe_read.__vfs_read.vfs_read.SyS_read.entry_SYSCALL_64_fastpath
1.014e+08 ±107% -100.0% 1445 ± 44% latency_stats.sum.rpc_wait_bit_killable.__rpc_execute.rpc_execute.rpc_run_task.nfs4_call_sync_sequence.[nfsv4]._nfs4_proc_access.[nfsv4].nfs4_proc_access.[nfsv4].nfs_do_access.nfs_permission.__inode_permission.inode_permission.link_path_walk
172662 ± 14% -18.4% 140966 ± 0% sched_debug.cfs_rq:/.exec_clock.avg
172933 ± 14% -18.0% 141779 ± 0% sched_debug.cfs_rq:/.exec_clock.max
171995 ± 14% -18.6% 139924 ± 0% sched_debug.cfs_rq:/.exec_clock.min
179.82 ± 33% +180.3% 504.10 ± 34% sched_debug.cfs_rq:/.exec_clock.stddev
18.12 ± 27% -67.6% 5.88 ± 35% sched_debug.cfs_rq:/.load.min
5948149 ± 14% -23.8% 4531737 ± 0% sched_debug.cfs_rq:/.min_vruntime.avg
5968318 ± 14% -23.6% 4561399 ± 0% sched_debug.cfs_rq:/.min_vruntime.max
5921026 ± 14% -24.1% 4496045 ± 0% sched_debug.cfs_rq:/.min_vruntime.min
0.67 ± 26% -69.0% 0.21 ± 34% sched_debug.cfs_rq:/.nr_running.min
0.10 ± 40% +185.3% 0.28 ± 9% sched_debug.cfs_rq:/.nr_running.stddev
0.38 ± 15% -39.2% 0.23 ± 17% sched_debug.cfs_rq:/.nr_spread_over.avg
11.22 ± 12% -46.1% 6.04 ± 28% sched_debug.cfs_rq:/.nr_spread_over.max
1.97 ± 12% -45.5% 1.07 ± 26% sched_debug.cfs_rq:/.nr_spread_over.stddev
18.97 ± 27% -69.7% 5.75 ± 36% sched_debug.cfs_rq:/.runnable_load_avg.min
4.44 ± 90% +157.1% 11.41 ± 37% sched_debug.cfs_rq:/.runnable_load_avg.stddev
13030 ±176% -199.0% -12895 ±-101% sched_debug.cfs_rq:/.spread0.avg
-13998 ±-100% +247.4% -48630 ±-36% sched_debug.cfs_rq:/.spread0.min
9880 ± 23% +59.9% 15795 ± 23% sched_debug.cfs_rq:/.spread0.stddev
34.89 ± 8% +120.4% 76.89 ± 13% sched_debug.cfs_rq:/.util_avg.stddev
196657 ± 16% +36.9% 269230 ± 6% sched_debug.cpu.avg_idle.stddev
17.42 ± 64% -79.4% 3.58 ± 11% sched_debug.cpu.clock.stddev
17.42 ± 64% -79.4% 3.58 ± 11% sched_debug.cpu.clock_task.stddev
18.10 ± 30% -51.7% 8.75 ± 27% sched_debug.cpu.cpu_load[0].min
18.74 ± 27% -44.9% 10.33 ± 18% sched_debug.cpu.cpu_load[1].min
19.22 ± 24% -36.7% 12.17 ± 6% sched_debug.cpu.cpu_load[2].min
1912 ± 23% -63.2% 704.04 ± 48% sched_debug.cpu.curr->pid.min
18.12 ± 27% -67.6% 5.88 ± 35% sched_debug.cpu.load.min
176320 ± 14% -15.5% 148922 ± 0% sched_debug.cpu.nr_load_updates.avg
178699 ± 14% -15.3% 151407 ± 0% sched_debug.cpu.nr_load_updates.max
174865 ± 14% -15.8% 147278 ± 0% sched_debug.cpu.nr_load_updates.min
0.67 ± 26% -69.0% 0.21 ± 34% sched_debug.cpu.nr_running.min
0.27 ± 8% +41.3% 0.39 ± 5% sched_debug.cpu.nr_running.stddev
152747 ± 14% -34.7% 99735 ± 0% sched_debug.cpu.nr_switches.avg
183979 ± 12% -31.3% 126457 ± 5% sched_debug.cpu.nr_switches.max
135220 ± 15% -41.5% 79108 ± 3% sched_debug.cpu.nr_switches.min
154367 ± 14% -34.5% 101165 ± 0% sched_debug.cpu.sched_count.avg
225427 ± 12% -20.1% 180086 ± 4% sched_debug.cpu.sched_count.max
134418 ± 14% -41.5% 78674 ± 3% sched_debug.cpu.sched_count.min
6588 ± 22% +264.1% 23990 ± 2% sched_debug.cpu.sched_goidle.avg
20233 ± 23% +73.8% 35174 ± 7% sched_debug.cpu.sched_goidle.max
3150 ± 22% +492.7% 18675 ± 2% sched_debug.cpu.sched_goidle.min
86325 ± 15% -36.0% 55212 ± 0% sched_debug.cpu.ttwu_count.avg
103976 ± 13% -33.4% 69252 ± 4% sched_debug.cpu.ttwu_count.max
74872 ± 14% -39.3% 45412 ± 3% sched_debug.cpu.ttwu_count.min
61351 ± 14% -60.3% 24369 ± 1% sched_debug.cpu.ttwu_local.avg
68724 ± 13% -56.3% 30060 ± 3% sched_debug.cpu.ttwu_local.max
54792 ± 14% -65.3% 19018 ± 6% sched_debug.cpu.ttwu_local.min
9.86 ± 9% -37.9% 6.13 ± 5% perf-profile.cycles.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.activate_task.ttwu_do_activate
5.67 ± 3% -18.2% 4.64 ± 6% perf-profile.cycles.__alloc_pages_nodemask.alloc_pages_current.pipe_write.__vfs_write.vfs_write
0.60 ± 98% +306.6% 2.46 ± 19% perf-profile.cycles.__do_softirq.irq_exit.smp_apic_timer_interrupt.apic_timer_interrupt
2.69 ± 52% +282.2% 10.26 ± 5% perf-profile.cycles.__hrtimer_run_queues.hrtimer_interrupt.local_apic_timer_interrupt.smp_apic_timer_interrupt.apic_timer_interrupt
4.49 ± 9% -36.3% 2.86 ± 9% perf-profile.cycles.__kernel_text_address.print_context_stack.dump_trace.save_stack_trace_tsk.__account_scheduler_latency
0.74 ± 23% -40.4% 0.44 ± 20% perf-profile.cycles.__list_del_entry.list_del.__rmqueue.get_page_from_freelist.__alloc_pages_nodemask
0.88 ± 31% +395.7% 4.34 ± 6% perf-profile.cycles.__mutex_lock_slowpath.mutex_lock.pipe_read.__vfs_read.vfs_read
0.41 ± 38% +283.7% 1.59 ± 17% perf-profile.cycles.__mutex_lock_slowpath.mutex_lock.pipe_wait.pipe_write.__vfs_write
3.42 ± 11% -32.5% 2.31 ± 16% perf-profile.cycles.__put_page.anon_pipe_buf_release.pipe_read.__vfs_read.vfs_read
1.01 ± 8% -28.6% 0.72 ± 10% perf-profile.cycles.__rmqueue.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_current.pipe_write
1.05 ± 20% -64.2% 0.38 ± 26% perf-profile.cycles.__schedule.schedule.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
2.86 ± 10% -15.9% 2.40 ± 2% perf-profile.cycles.__schedule.schedule.futex_wait_queue_me.futex_wait.do_futex
0.92 ± 7% -22.4% 0.72 ± 12% perf-profile.cycles.__schedule.schedule.pipe_wait.pipe_write.__vfs_write
26.84 ± 3% -13.9% 23.11 ± 3% perf-profile.cycles.__vfs_write.vfs_write.sys_write.entry_SYSCALL_64_fastpath
3.23 ± 11% -33.6% 2.15 ± 7% perf-profile.cycles.__wake_up_common.__wake_up_sync_key.pipe_read.__vfs_read.vfs_read
3.27 ± 10% -33.1% 2.19 ± 5% perf-profile.cycles.__wake_up_sync_key.pipe_read.__vfs_read.vfs_read.sys_read
0.18 ± 59% +745.1% 1.50 ± 9% perf-profile.cycles.activate_task.ttwu_do_activate.sched_ttwu_pending.cpu_startup_entry.start_secondary
1.65 ± 10% -65.3% 0.57 ± 13% perf-profile.cycles.activate_task.ttwu_do_activate.sched_ttwu_pending.scheduler_ipi.smp_reschedule_interrupt
2.33 ± 12% -33.2% 1.56 ± 10% perf-profile.cycles.activate_task.ttwu_do_activate.try_to_wake_up.default_wake_function.autoremove_wake_function
5.23 ± 15% -60.1% 2.09 ± 11% perf-profile.cycles.activate_task.ttwu_do_activate.try_to_wake_up.wake_up_q.futex_requeue
3.28 ± 10% -35.9% 2.10 ± 13% perf-profile.cycles.activate_task.ttwu_do_activate.try_to_wake_up.wake_up_q.futex_wake
6.42 ± 3% -15.8% 5.41 ± 4% perf-profile.cycles.alloc_pages_current.pipe_write.__vfs_write.vfs_write.sys_write
2.05 ± 13% -37.9% 1.27 ± 4% perf-profile.cycles.anon_pipe_buf_release.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
3.51 ± 11% -33.3% 2.35 ± 16% perf-profile.cycles.anon_pipe_buf_release.pipe_read.__vfs_read.vfs_read.sys_read
5.04 ± 49% +239.8% 17.13 ± 9% perf-profile.cycles.apic_timer_interrupt
3.18 ± 12% -34.0% 2.10 ± 7% perf-profile.cycles.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_read.__vfs_read
1.06 ± 77% +158.9% 2.76 ± 5% perf-profile.cycles.call_cpuidle.cpu_startup_entry.start_secondary
0.27 ±133% +230.6% 0.89 ± 24% perf-profile.cycles.clockevents_program_event.tick_program_event.hrtimer_interrupt.local_apic_timer_interrupt.smp_apic_timer_interrupt
17.49 ± 3% -21.5% 13.73 ± 1% perf-profile.cycles.copy_page_from_iter.pipe_write.__vfs_write.vfs_write.sys_write
1.45 ± 9% -21.4% 1.14 ± 13% perf-profile.cycles.copy_page_from_iter_iovec.copy_page_from_iter.pipe_write.__vfs_write.vfs_write
24.42 ± 3% -15.2% 20.70 ± 2% perf-profile.cycles.copy_page_to_iter.pipe_read.__vfs_read.vfs_read.sys_read
15.67 ± 3% -22.7% 12.12 ± 1% perf-profile.cycles.copy_user_generic_string.copy_page_from_iter.pipe_write.__vfs_write.vfs_write
23.42 ± 3% -15.8% 19.72 ± 2% perf-profile.cycles.copy_user_generic_string.copy_page_to_iter.pipe_read.__vfs_read.vfs_read
1.80 ± 54% +329.2% 7.71 ± 5% perf-profile.cycles.cpu_startup_entry.start_secondary
1.06 ± 77% +157.0% 2.74 ± 5% perf-profile.cycles.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary
1.46 ± 12% -31.4% 1.00 ± 14% perf-profile.cycles.deactivate_task.__schedule.schedule.futex_wait_queue_me.futex_wait
3.17 ± 12% -34.1% 2.09 ± 7% perf-profile.cycles.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_read
17.95 ± 7% -42.3% 10.36 ± 2% perf-profile.cycles.do_futex.sys_futex.entry_SYSCALL_64_fastpath
8.78 ± 9% -36.6% 5.57 ± 4% perf-profile.cycles.dump_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair
9.98 ± 10% -45.7% 5.42 ± 4% perf-profile.cycles.enqueue_entity.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up
0.16 ± 60% +843.1% 1.53 ± 10% perf-profile.cycles.enqueue_task_fair.activate_task.ttwu_do_activate.sched_ttwu_pending.cpu_startup_entry
1.60 ± 13% -65.3% 0.55 ± 15% perf-profile.cycles.enqueue_task_fair.activate_task.ttwu_do_activate.sched_ttwu_pending.scheduler_ipi
2.29 ± 11% -34.1% 1.51 ± 9% perf-profile.cycles.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up.default_wake_function
8.37 ± 14% -50.9% 4.11 ± 5% perf-profile.cycles.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up.wake_up_q
83.20 ± 3% -19.0% 67.36 ± 2% perf-profile.cycles.entry_SYSCALL_64_fastpath
1.17 ± 19% -60.8% 0.46 ± 34% perf-profile.cycles.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
3.13 ± 12% -33.5% 2.08 ± 17% perf-profile.cycles.free_hot_cold_page.__put_page.anon_pipe_buf_release.pipe_read.__vfs_read
1.68 ± 13% -51.9% 0.81 ± 13% perf-profile.cycles.free_pcppages_bulk.free_hot_cold_page.__put_page.anon_pipe_buf_release.pipe_read
8.80 ± 7% -58.6% 3.64 ± 6% perf-profile.cycles.futex_requeue.do_futex.sys_futex.entry_SYSCALL_64_fastpath
4.01 ± 12% -21.3% 3.16 ± 3% perf-profile.cycles.futex_wait.do_futex.sys_futex.entry_SYSCALL_64_fastpath
3.38 ± 8% -17.7% 2.78 ± 3% perf-profile.cycles.futex_wait_queue_me.futex_wait.do_futex.sys_futex.entry_SYSCALL_64_fastpath
4.59 ± 10% -26.7% 3.37 ± 11% perf-profile.cycles.futex_wake.do_futex.sys_futex.entry_SYSCALL_64_fastpath
4.08 ± 3% -21.1% 3.22 ± 5% perf-profile.cycles.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_current.pipe_write.__vfs_write
3.29 ± 59% +274.5% 12.30 ± 8% perf-profile.cycles.hrtimer_interrupt.local_apic_timer_interrupt.smp_apic_timer_interrupt.apic_timer_interrupt
0.33 ± 32% +514.2% 2.06 ± 3% perf-profile.cycles.intel_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry
0.67 ± 99% +290.4% 2.63 ± 17% perf-profile.cycles.irq_exit.smp_apic_timer_interrupt.apic_timer_interrupt
1.07 ± 3% -49.4% 0.54 ± 27% perf-profile.cycles.is_ftrace_trampoline.__kernel_text_address.print_context_stack.dump_trace.save_stack_trace_tsk
1.74 ± 12% -32.8% 1.17 ± 10% perf-profile.cycles.is_module_text_address.__kernel_text_address.print_context_stack.dump_trace.save_stack_trace_tsk
0.76 ± 22% -39.6% 0.46 ± 17% perf-profile.cycles.list_del.__rmqueue.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_current
3.41 ± 59% +268.5% 12.55 ± 8% perf-profile.cycles.local_apic_timer_interrupt.smp_apic_timer_interrupt.apic_timer_interrupt
0.93 ± 29% +369.4% 4.37 ± 6% perf-profile.cycles.mutex_lock.pipe_read.__vfs_read.vfs_read.sys_read
0.44 ± 39% +273.3% 1.64 ± 16% perf-profile.cycles.mutex_lock.pipe_wait.pipe_write.__vfs_write.vfs_write
0.88 ± 31% +394.0% 4.32 ± 5% perf-profile.cycles.mutex_optimistic_spin.__mutex_lock_slowpath.mutex_lock.pipe_read.__vfs_read
0.41 ± 38% +283.7% 1.59 ± 17% perf-profile.cycles.mutex_optimistic_spin.__mutex_lock_slowpath.mutex_lock.pipe_wait.pipe_write
0.85 ± 33% +396.2% 4.24 ± 5% perf-profile.cycles.mutex_spin_on_owner.isra.4.mutex_optimistic_spin.__mutex_lock_slowpath.mutex_lock.pipe_read
0.41 ± 38% +276.5% 1.56 ± 18% perf-profile.cycles.mutex_spin_on_owner.isra.4.mutex_optimistic_spin.__mutex_lock_slowpath.mutex_lock.pipe_wait
0.23 ± 98% +298.9% 0.92 ± 12% perf-profile.cycles.perf_event_task_tick.scheduler_tick.update_process_times.tick_sched_handle.tick_sched_timer
1.55 ± 11% +60.2% 2.49 ± 12% perf-profile.cycles.pipe_wait.pipe_write.__vfs_write.vfs_write.sys_write
26.79 ± 3% -14.0% 23.05 ± 3% perf-profile.cycles.pipe_write.__vfs_write.vfs_write.sys_write.entry_SYSCALL_64_fastpath
0.67 ± 97% -90.7% 0.06 ± 54% perf-profile.cycles.poll_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry
7.72 ± 10% -36.3% 4.92 ± 5% perf-profile.cycles.print_context_stack.dump_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity
0.22 ± 27% +448.9% 1.23 ± 18% perf-profile.cycles.rcu_check_callbacks.update_process_times.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues
1.72 ± 10% -82.1% 0.31 ± 16% perf-profile.cycles.reschedule_interrupt
0.36 ± 82% +222.2% 1.16 ± 22% perf-profile.cycles.run_timer_softirq.__do_softirq.irq_exit.smp_apic_timer_interrupt.apic_timer_interrupt
8.82 ± 10% -36.9% 5.57 ± 3% perf-profile.cycles.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.activate_task
0.23 ± 40% +625.8% 1.69 ± 4% perf-profile.cycles.sched_ttwu_pending.cpu_startup_entry.start_secondary
1.37 ± 11% -81.2% 0.26 ± 18% perf-profile.cycles.sched_ttwu_pending.scheduler_ipi.smp_reschedule_interrupt.reschedule_interrupt
1.09 ± 21% -63.3% 0.40 ± 29% perf-profile.cycles.schedule.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
3.00 ± 8% -14.5% 2.57 ± 4% perf-profile.cycles.schedule.futex_wait_queue_me.futex_wait.do_futex.sys_futex
0.96 ± 10% -24.1% 0.72 ± 13% perf-profile.cycles.schedule.pipe_wait.pipe_write.__vfs_write.vfs_write
0.11 ± 44% +675.6% 0.87 ± 19% perf-profile.cycles.schedule.schedule_preempt_disabled.cpu_startup_entry.start_secondary
0.11 ± 44% +675.6% 0.87 ± 19% perf-profile.cycles.schedule_preempt_disabled.cpu_startup_entry.start_secondary
1.47 ± 14% -82.0% 0.27 ± 21% perf-profile.cycles.scheduler_ipi.smp_reschedule_interrupt.reschedule_interrupt
1.65 ± 61% +266.8% 6.04 ± 9% perf-profile.cycles.scheduler_tick.update_process_times.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues
1.38 ± 17% -66.1% 0.47 ± 13% perf-profile.cycles.select_task_rq_fair.try_to_wake_up.wake_up_q.futex_requeue.do_futex
4.41 ± 62% +258.0% 15.80 ± 9% perf-profile.cycles.smp_apic_timer_interrupt.apic_timer_interrupt
1.50 ± 14% -80.8% 0.29 ± 17% perf-profile.cycles.smp_reschedule_interrupt.reschedule_interrupt
1.81 ± 54% +336.0% 7.89 ± 4% perf-profile.cycles.start_secondary
18.17 ± 7% -42.4% 10.46 ± 2% perf-profile.cycles.sys_futex.entry_SYSCALL_64_fastpath
35.99 ± 2% -9.8% 32.45 ± 3% perf-profile.cycles.sys_read.entry_SYSCALL_64_fastpath
27.21 ± 3% -14.1% 23.37 ± 3% perf-profile.cycles.sys_write.entry_SYSCALL_64_fastpath
1.21 ± 17% -57.6% 0.52 ± 32% perf-profile.cycles.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.85 ± 52% +261.2% 3.07 ± 7% perf-profile.cycles.task_tick_fair.scheduler_tick.update_process_times.tick_sched_handle.tick_sched_timer
0.32 ±134% +244.2% 1.11 ± 21% perf-profile.cycles.tick_program_event.hrtimer_interrupt.local_apic_timer_interrupt.smp_apic_timer_interrupt.apic_timer_interrupt
2.31 ± 50% +274.6% 8.66 ± 6% perf-profile.cycles.tick_sched_handle.isra.19.tick_sched_timer.__hrtimer_run_queues.hrtimer_interrupt.local_apic_timer_interrupt
2.44 ± 53% +279.1% 9.23 ± 6% perf-profile.cycles.tick_sched_timer.__hrtimer_run_queues.hrtimer_interrupt.local_apic_timer_interrupt.smp_apic_timer_interrupt
3.17 ± 12% -33.4% 2.11 ± 7% perf-profile.cycles.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key
7.72 ± 8% -61.4% 2.98 ± 6% perf-profile.cycles.try_to_wake_up.wake_up_q.futex_requeue.do_futex.sys_futex
4.04 ± 8% -27.5% 2.93 ± 11% perf-profile.cycles.try_to_wake_up.wake_up_q.futex_wake.do_futex.sys_futex
0.19 ± 51% +728.6% 1.59 ± 7% perf-profile.cycles.ttwu_do_activate.constprop.89.sched_ttwu_pending.cpu_startup_entry.start_secondary
1.72 ± 11% -61.5% 0.66 ± 15% perf-profile.cycles.ttwu_do_activate.constprop.89.sched_ttwu_pending.scheduler_ipi.smp_reschedule_interrupt.reschedule_interrupt
2.43 ± 13% -31.6% 1.66 ± 7% perf-profile.cycles.ttwu_do_activate.constprop.89.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common
5.57 ± 16% -60.2% 2.21 ± 11% perf-profile.cycles.ttwu_do_activate.constprop.89.try_to_wake_up.wake_up_q.futex_requeue.do_futex
3.43 ± 8% -36.8% 2.17 ± 12% perf-profile.cycles.ttwu_do_activate.constprop.89.try_to_wake_up.wake_up_q.futex_wake.do_futex
0.31 ± 83% +243.9% 1.06 ± 6% perf-profile.cycles.update_cfs_shares.task_tick_fair.scheduler_tick.update_process_times.tick_sched_handle
2.27 ± 52% +274.1% 8.49 ± 5% perf-profile.cycles.update_process_times.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues.hrtimer_interrupt
35.85 ± 2% -9.7% 32.36 ± 3% perf-profile.cycles.vfs_read.sys_read.entry_SYSCALL_64_fastpath
27.07 ± 2% -14.1% 23.25 ± 3% perf-profile.cycles.vfs_write.sys_write.entry_SYSCALL_64_fastpath
7.87 ± 7% -60.7% 3.09 ± 5% perf-profile.cycles.wake_up_q.futex_requeue.do_futex.sys_futex.entry_SYSCALL_64_fastpath
4.09 ± 8% -27.0% 2.98 ± 10% perf-profile.cycles.wake_up_q.futex_wake.do_futex.sys_futex.entry_SYSCALL_64_fastpath
lkp-snb01: Sandy Bridge-EP
Memory: 32G
pigz.throughput
3.58e+08 ++---------------------------------------------------------------+
*. .*.*..*. .*.*.. .*. .*. |
3.56e+08 ++*..*.*..* *..*.*.*. *.*..* *..*.*..*.*.*. *..*.*
| |
| |
3.54e+08 ++ |
| |
3.52e+08 ++ |
| |
3.5e+08 ++ |
| |
| |
3.48e+08 ++ O O O O O |
O O O O O O O O |
3.46e+08 ++-----O----------------O----O------O----------------------------+
pigz.time.user_time
9450 ++-------------------------------*-----------------------------------+
9400 *+.*.*..*.*..*.*..*.*..*..*. .* *.*..*.*..*..*.*..*.*..*.*..*.*..*
| *. |
9350 ++ |
9300 ++ |
| |
9250 ++ |
9200 ++ |
9150 ++ |
| |
9100 ++ |
9050 ++ |
| O O |
9000 O+ O O O O O O O |
8950 ++------O-O---------------O----O----O-O--O---------------------------+
pigz.time.system_time
110 ++--------------------------------------------------------------------+
*.. .*.. .*.. .*.. .*.. .*.. .*.. .*
108 ++ *.*..*.*. *.*..* *..*.*..* *.*. *.*..*.*. * *.*. |
106 ++ |
| |
104 ++ |
102 ++ |
| |
100 ++ |
98 ++ |
| |
96 ++ |
94 O+ O O O O O O O O O |
| O O O O O O O |
92 ++--------------------------------------------------------------------+
pigz.time.percent_of_cpu_this_job_got
3180 *+-----------*-*--*--------------*----*----*------------*--*-*----*--+
| *.*..*.*. *..*..*.*..* * * *..*.*..* * *
3160 ++ |
3140 ++ |
| |
3120 ++ |
3100 ++ |
| |
3080 ++ |
3060 ++ |
| |
3040 ++ O O |
3020 ++ O O O O O O |
O O O O O O O O O |
3000 ++-------------------------------------------------------------------+
pigz.time.voluntary_context_switches
4.6e+06 ++----------------------------------------------------------------+
*. .*.. .*. .*. .*. .*. .*.|
4.4e+06 ++*..*.*..*.*..* *.*.*..*.*. *. *. *.*..*.*. *..*.*. *
| |
4.2e+06 ++ |
| |
4e+06 ++ |
| |
3.8e+06 ++ |
| |
3.6e+06 ++ |
| |
3.4e+06 ++ |
O O O O O O O O O O O O O O O O O |
3.2e+06 ++----------------------------------------------------------------+
pigz.time.involuntary_context_switches
3.5e+06 ++----------------------------------------------------------------+
| .*. |
*.*..*.*..*.*..*.*..*.*.*..*.*. *..*.*..*.*.*..*.*..*.*..*.*..*.*
3e+06 ++ |
| |
| |
2.5e+06 ++ |
| |
2e+06 ++ |
| |
| |
1.5e+06 ++ |
| O O O |
O O O O O O O O O O O O O O |
1e+06 ++----------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
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.
Thanks,
Xiaolong Ye
View attachment "job.yaml" of type "text/plain" (3321 bytes)
View attachment "reproduce" of type "text/plain" (2999 bytes)
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