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Date: Thu, 7 Nov 2019 17:03:06 +0800
From: lkp report check <rong.a.chen@...el.com>
To: David Howells <dhowells@...hat.com>
Cc: torvalds@...ux-foundation.org, dhowells@...hat.com,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Peter Zijlstra <peterz@...radead.org>,
nicolas.dichtel@...nd.com, raven@...maw.net,
Christian Brauner <christian@...uner.io>,
keyrings@...r.kernel.org, linux-usb@...r.kernel.org,
linux-block@...r.kernel.org, linux-security-module@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org,
linux-kernel@...r.kernel.org, lkp@...ts.01.org
Subject: [pipe] d60337eff1: phoronix-test-suite.noise-level.0.activity_level
144.0% improvement
Greeting,
FYI, we noticed a 144.0% improvement of phoronix-test-suite.noise-level.0.activity_level due to commit:
commit: d60337eff18a3c587832ab8053a567f1da9710d2 ("[RFC PATCH 04/11] pipe: Use head and tail pointers for the ring, not cursor and length [ver #3]")
url: https://github.com/0day-ci/linux/commits/David-Howells/pipe-Notification-queue-preparation-ver-3/20191103-044740
in testcase: phoronix-test-suite
on test machine: 16 threads Intel(R) Xeon(R) CPU X5570 @ 2.93GHz with 48G memory
with following parameters:
test: noise-level-1.1.0
cpufreq_governor: performance
ucode: 0x1d
test-description: The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available that provides an extensible framework for which new tests can be easily added.
test-url: http://www.phoronix-test-suite.com/
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase/ucode:
gcc-7/performance/x86_64-rhel-7.6/debian-x86_64-phoronix/lkp-nhm-2ep1/noise-level-1.1.0/phoronix-test-suite/0x1d
commit:
77a98a59a1 ("Add wake_up_interruptible_sync_poll_locked() [ver #3]")
d60337eff1 ("pipe: Use head and tail pointers for the ring, not cursor and length [ver #3]")
77a98a59a1ec5e35 d60337eff18a3c587832ab8053a
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
:4 25% 1:4 kmsg.de###]
:4 100% 4:4 kmsg.head=#,tail=#,buffers=
:4 100% 4:4 kmsg.idx=#,offset=
:4 100% 4:4 dmesg.RIP:sanity
1:4 -25% :4 dmesg.WARNING:at#for_ip_swapgs_restore_regs_and_return_to_usermode/0x
:4 100% 4:4 dmesg.WARNING:at_lib/iov_iter.c:#sanity
1:4 -25% :4 dmesg.WARNING:stack_recursion
%stddev %change %stddev
\ | \
75726 ± 2% +144.0% 184798 ± 8% phoronix-test-suite.noise-level.0.activity_level
46.75 ±115% -84.0% 7.50 ±157% interrupts.CPU0.TLB:TLB_shootdowns
36.05 ± 4% +26.1% 45.47 ± 4% boot-time.boot
504.75 ± 4% +21.9% 615.34 ± 3% boot-time.idle
84041 -1.2% 83015 proc-vmstat.nr_inactive_file
84041 -1.2% 83015 proc-vmstat.nr_zone_inactive_file
1016 ± 6% +10.9% 1126 ± 4% vmstat.system.cs
31702 -47.1% 16758 vmstat.system.in
2596 ± 19% -59.5% 1051 ± 70% numa-numastat.node0.other_node
111841 ± 34% +42.4% 159231 ± 28% numa-numastat.node1.local_node
112390 ± 34% +43.6% 161373 ± 28% numa-numastat.node1.numa_hit
548.75 ± 96% +290.6% 2143 ± 35% numa-numastat.node1.other_node
1.228e+09 ± 28% +52.4% 1.872e+09 ± 35% cpuidle.C3.time
2650850 ± 15% +87.2% 4961279 ± 36% cpuidle.C6.time
3765 ± 18% +70.5% 6419 ± 40% cpuidle.C6.usage
552648 ± 27% +374.5% 2622569 ± 48% cpuidle.POLL.time
8453 ± 12% +150.4% 21166 ± 30% cpuidle.POLL.usage
23.38 ± 43% -57.0% 10.04 ± 53% sched_debug.cfs_rq:/.load_avg.min
7840 ± 7% +74.8% 13701 ± 4% sched_debug.cfs_rq:/.min_vruntime.avg
16419 ± 8% +105.1% 33672 ± 10% sched_debug.cfs_rq:/.min_vruntime.max
3796 ± 4% +101.9% 7666 ± 11% sched_debug.cfs_rq:/.min_vruntime.stddev
3799 ± 4% +101.8% 7667 ± 11% sched_debug.cfs_rq:/.spread0.stddev
0.73 ± 28% -44.7% 0.41 ± 40% sched_debug.cpu.nr_running.avg
0.72 ± 20% -35.9% 0.46 ± 18% sched_debug.cpu.nr_running.stddev
6932 ± 23% +80.9% 12543 ± 12% sched_debug.cpu.nr_switches.avg
3053 ± 27% +78.6% 5452 ± 7% sched_debug.cpu.nr_switches.min
16201 ± 32% -70.7% 4750 ± 38% numa-vmstat.node0.nr_active_file
215951 ± 35% -56.4% 94255 ± 60% numa-vmstat.node0.nr_file_pages
151995 ± 50% -61.0% 59210 ± 57% numa-vmstat.node0.nr_inactive_anon
152629 ± 50% -60.9% 59672 ± 57% numa-vmstat.node0.nr_shmem
16201 ± 32% -70.7% 4750 ± 38% numa-vmstat.node0.nr_zone_active_file
151995 ± 50% -61.0% 59210 ± 57% numa-vmstat.node0.nr_zone_inactive_anon
12930 ±137% -90.0% 1293 ± 54% numa-vmstat.node0.numa_other
9501 ± 58% +123.8% 21263 ± 9% numa-vmstat.node1.nr_active_file
158673 ± 47% +75.9% 279042 ± 20% numa-vmstat.node1.nr_file_pages
2767 ± 11% -15.7% 2334 ± 6% numa-vmstat.node1.nr_kernel_stack
9501 ± 58% +123.8% 21263 ± 9% numa-vmstat.node1.nr_zone_active_file
64781 ± 32% -70.7% 19003 ± 38% numa-meminfo.node0.Active(file)
863806 ± 35% -56.4% 377022 ± 60% numa-meminfo.node0.FilePages
796441 ± 36% -55.3% 356115 ± 61% numa-meminfo.node0.Inactive
607982 ± 50% -61.0% 236841 ± 57% numa-meminfo.node0.Inactive(anon)
1156778 ± 26% -46.6% 617340 ± 46% numa-meminfo.node0.MemUsed
610519 ± 50% -60.9% 238689 ± 57% numa-meminfo.node0.Shmem
163141 ± 13% +58.1% 257940 ± 30% numa-meminfo.node1.Active
38001 ± 58% +123.8% 85055 ± 9% numa-meminfo.node1.Active(file)
634701 ± 47% +75.9% 1116171 ± 20% numa-meminfo.node1.FilePages
593680 ± 49% +72.8% 1026170 ± 21% numa-meminfo.node1.Inactive
2774 ± 11% -15.7% 2338 ± 5% numa-meminfo.node1.KernelStack
884323 ± 34% +60.4% 1418847 ± 20% numa-meminfo.node1.MemUsed
11.10 ± 4% +21.4% 13.47 ± 2% perf-stat.i.MPKI
3.67e+08 ± 13% -48.5% 1.889e+08 ± 3% perf-stat.i.branch-instructions
6020544 ± 72% -60.4% 2383477 ± 2% perf-stat.i.branch-misses
4.82 ± 6% -0.9 3.92 ± 3% perf-stat.i.cache-miss-rate%
754312 ± 8% -45.6% 410529 ± 7% perf-stat.i.cache-misses
15105378 -35.5% 9742537 ± 2% perf-stat.i.cache-references
951.84 ± 7% +12.5% 1070 ± 3% perf-stat.i.context-switches
5.32e+09 ± 5% -47.6% 2.79e+09 ± 4% perf-stat.i.cpu-cycles
0.11 ± 9% +0.1 0.17 ± 7% perf-stat.i.dTLB-load-miss-rate%
4.238e+08 ± 13% -46.4% 2.273e+08 ± 2% perf-stat.i.dTLB-loads
0.22 ± 5% +0.1 0.35 ± 3% perf-stat.i.dTLB-store-miss-rate%
1.705e+08 ± 7% -38.9% 1.042e+08 ± 3% perf-stat.i.dTLB-stores
365420 ± 3% -38.8% 223608 ± 5% perf-stat.i.iTLB-load-misses
1.533e+09 ± 15% -48.4% 7.915e+08 ± 2% perf-stat.i.iTLB-loads
1.511e+09 ± 15% -50.0% 7.565e+08 perf-stat.i.instructions
4573 ± 15% -16.7% 3808 ± 3% perf-stat.i.instructions-per-iTLB-miss
10.20 ± 13% +26.0% 12.85 ± 2% perf-stat.overall.MPKI
4.99 ± 7% -0.8 4.22 ± 4% perf-stat.overall.cache-miss-rate%
0.13 ± 11% +0.1 0.21 ± 12% perf-stat.overall.dTLB-load-miss-rate%
0.27 ± 11% +0.1 0.39 ± 11% perf-stat.overall.dTLB-store-miss-rate%
4142 ± 15% -18.1% 3392 ± 6% perf-stat.overall.instructions-per-iTLB-miss
3.623e+08 ± 13% -48.2% 1.877e+08 ± 3% perf-stat.ps.branch-instructions
5944803 ± 72% -60.1% 2372479 ± 2% perf-stat.ps.branch-misses
744148 ± 8% -45.2% 408044 ± 6% perf-stat.ps.cache-misses
14895664 -35.2% 9653768 perf-stat.ps.cache-references
939.36 ± 6% +12.9% 1060 ± 2% perf-stat.ps.context-switches
5.252e+09 ± 5% -47.2% 2.771e+09 ± 4% perf-stat.ps.cpu-cycles
4.185e+08 ± 13% -46.0% 2.259e+08 ± 2% perf-stat.ps.dTLB-loads
1.684e+08 ± 7% -38.3% 1.038e+08 ± 3% perf-stat.ps.dTLB-stores
360508 ± 3% -38.4% 222217 ± 5% perf-stat.ps.iTLB-load-misses
1.514e+09 ± 15% -48.0% 7.866e+08 ± 2% perf-stat.ps.iTLB-loads
1.492e+09 ± 15% -49.6% 7.515e+08 perf-stat.ps.instructions
17337 ± 23% +98.0% 34327 ± 16% softirqs.CPU0.SCHED
50316 ± 20% +74.0% 87563 ± 29% softirqs.CPU0.TIMER
15541 ± 23% +75.0% 27190 ± 25% softirqs.CPU1.SCHED
46536 ± 26% +81.8% 84612 ± 18% softirqs.CPU1.TIMER
14140 ± 27% +90.7% 26969 ± 29% softirqs.CPU10.SCHED
44353 ± 23% +88.2% 83495 ± 23% softirqs.CPU10.TIMER
14456 ± 22% +109.7% 30308 ± 23% softirqs.CPU11.SCHED
45458 ± 22% +89.8% 86266 ± 28% softirqs.CPU11.TIMER
14745 ± 29% +113.5% 31485 ± 18% softirqs.CPU12.SCHED
45475 ± 28% +79.8% 81785 ± 22% softirqs.CPU12.TIMER
14339 ± 21% +116.7% 31070 ± 22% softirqs.CPU13.SCHED
45935 ± 20% +90.1% 87325 ± 25% softirqs.CPU13.TIMER
14439 ± 21% +95.7% 28260 ± 17% softirqs.CPU14.SCHED
45691 ± 20% +90.0% 86793 ± 19% softirqs.CPU14.TIMER
14234 ± 24% +107.0% 29466 ± 23% softirqs.CPU15.SCHED
47195 ± 23% +83.0% 86374 ± 21% softirqs.CPU15.TIMER
14252 ± 26% +101.4% 28710 ± 20% softirqs.CPU2.SCHED
50804 ± 23% +62.1% 82341 ± 20% softirqs.CPU2.TIMER
46701 ± 30% +81.4% 84697 ± 22% softirqs.CPU3.TIMER
14081 ± 26% +104.9% 28858 ± 28% softirqs.CPU4.SCHED
44533 ± 29% +91.5% 85281 ± 21% softirqs.CPU4.TIMER
14698 ± 23% +93.4% 28431 ± 24% softirqs.CPU5.SCHED
48080 ± 26% +68.6% 81081 ± 23% softirqs.CPU5.TIMER
14040 ± 25% +93.9% 27217 ± 18% softirqs.CPU6.SCHED
41048 ± 28% +100.0% 82104 ± 20% softirqs.CPU6.TIMER
13985 ± 20% +100.3% 28012 ± 28% softirqs.CPU7.SCHED
44020 ± 23% +85.0% 81425 ± 27% softirqs.CPU7.TIMER
14187 ± 24% +100.1% 28390 ± 17% softirqs.CPU8.SCHED
44349 ± 26% +84.9% 81992 ± 24% softirqs.CPU8.TIMER
14201 ± 24% +104.2% 29004 ± 19% softirqs.CPU9.SCHED
45976 ± 24% +82.6% 83939 ± 22% softirqs.CPU9.TIMER
233752 ± 23% +99.2% 465530 ± 21% softirqs.SCHED
736478 ± 24% +82.9% 1347084 ± 22% softirqs.TIMER
28.76 ±119% -25.5 3.26 ±173% perf-profile.calltrace.cycles-pp.cpu_idle_poll.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
15.99 ± 92% -13.0 3.00 ±173% perf-profile.calltrace.cycles-pp.__libc_start_main
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.ioctl.__libc_start_main
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl.__libc_start_main
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.event_function_call.perf_event_for_each_child._perf_ioctl.perf_ioctl.do_vfs_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.smp_call_function_single.event_function_call.perf_event_for_each_child._perf_ioctl.perf_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.ioctl.__libc_start_main
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl.__libc_start_main
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.ksys_ioctl.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.do_vfs_ioctl.ksys_ioctl.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.perf_ioctl.do_vfs_ioctl.ksys_ioctl.__x64_sys_ioctl.do_syscall_64
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp._perf_ioctl.perf_ioctl.do_vfs_ioctl.ksys_ioctl.__x64_sys_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.calltrace.cycles-pp.perf_event_for_each_child._perf_ioctl.perf_ioctl.do_vfs_ioctl.ksys_ioctl
9.93 ±130% -8.8 1.17 ±173% perf-profile.calltrace.cycles-pp.tick_check_broadcast_expired.cpu_idle_poll.do_idle.cpu_startup_entry.start_secondary
3.69 ±108% -1.0 2.66 ±173% perf-profile.calltrace.cycles-pp.perf_release.__fput.task_work_run.do_exit.do_group_exit
3.69 ±108% -1.0 2.66 ±173% perf-profile.calltrace.cycles-pp.perf_event_release_kernel.perf_release.__fput.task_work_run.do_exit
3.69 ±108% -1.0 2.67 ±173% perf-profile.calltrace.cycles-pp.task_work_run.do_exit.do_group_exit.get_signal.do_signal
3.69 ±108% -1.0 2.67 ±173% perf-profile.calltrace.cycles-pp.__fput.task_work_run.do_exit.do_group_exit.get_signal
3.70 ±108% -1.0 2.69 ±173% perf-profile.calltrace.cycles-pp.do_group_exit.get_signal.do_signal.exit_to_usermode_loop.do_syscall_64
3.70 ±108% -1.0 2.69 ±173% perf-profile.calltrace.cycles-pp.do_exit.do_group_exit.get_signal.do_signal.exit_to_usermode_loop
3.70 ±108% -1.0 2.69 ±173% perf-profile.calltrace.cycles-pp.do_signal.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.70 ±108% -1.0 2.69 ±173% perf-profile.calltrace.cycles-pp.get_signal.do_signal.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.70 ±108% -1.0 2.69 ±173% perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.on_each_cpu.flush_tlb_kernel_range.pmd_free_pte_page.ioremap_page_range.__ioremap_caller
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.smp_call_function_many.on_each_cpu.flush_tlb_kernel_range.pmd_free_pte_page.ioremap_page_range
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.drm_client_buffer_vmap.drm_fb_helper_dirty_work.process_one_work.worker_thread.kthread
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.drm_gem_vmap.drm_client_buffer_vmap.drm_fb_helper_dirty_work.process_one_work.worker_thread
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.drm_gem_vram_object_vmap.drm_gem_vmap.drm_client_buffer_vmap.drm_fb_helper_dirty_work.process_one_work
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.drm_gem_vram_kmap.drm_gem_vram_object_vmap.drm_gem_vmap.drm_client_buffer_vmap.drm_fb_helper_dirty_work
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.ttm_bo_kmap.drm_gem_vram_kmap.drm_gem_vram_object_vmap.drm_gem_vmap.drm_client_buffer_vmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.__ioremap_caller.ttm_bo_kmap.drm_gem_vram_kmap.drm_gem_vram_object_vmap.drm_gem_vmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.ioremap_page_range.__ioremap_caller.ttm_bo_kmap.drm_gem_vram_kmap.drm_gem_vram_object_vmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.pmd_free_pte_page.ioremap_page_range.__ioremap_caller.ttm_bo_kmap.drm_gem_vram_kmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.calltrace.cycles-pp.flush_tlb_kernel_range.pmd_free_pte_page.ioremap_page_range.__ioremap_caller.ttm_bo_kmap
28.76 ±119% -25.5 3.26 ±173% perf-profile.children.cycles-pp.cpu_idle_poll
15.19 ± 82% -13.2 1.95 ±164% perf-profile.children.cycles-pp.smp_call_function_single
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp.ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp.__x64_sys_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp.ksys_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp.do_vfs_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp.perf_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp._perf_ioctl
10.12 ± 67% -9.2 0.94 ±173% perf-profile.children.cycles-pp.perf_event_for_each_child
10.18 ±125% -9.0 1.22 ±163% perf-profile.children.cycles-pp.tick_check_broadcast_expired
10.55 ± 69% -8.7 1.87 ±173% perf-profile.children.cycles-pp.event_function_call
3.08 ± 73% -3.1 0.00 perf-profile.children.cycles-pp.perf_event_ctx_lock_nested
3.08 ± 73% -3.1 0.00 perf-profile.children.cycles-pp.__mutex_lock
3.08 ± 73% -3.1 0.00 perf-profile.children.cycles-pp.mutex_spin_on_owner
3.69 ±108% -1.0 2.66 ±173% perf-profile.children.cycles-pp.perf_release
3.69 ±108% -1.0 2.66 ±173% perf-profile.children.cycles-pp.perf_event_release_kernel
3.70 ±108% -1.0 2.69 ±173% perf-profile.children.cycles-pp.do_signal
3.70 ±108% -1.0 2.69 ±173% perf-profile.children.cycles-pp.get_signal
3.69 ±108% -1.0 2.68 ±173% perf-profile.children.cycles-pp.task_work_run
3.69 ±108% -1.0 2.68 ±173% perf-profile.children.cycles-pp.__fput
3.70 ±108% -1.0 2.70 ±173% perf-profile.children.cycles-pp.exit_to_usermode_loop
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.drm_client_buffer_vmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.drm_gem_vmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.drm_gem_vram_object_vmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.drm_gem_vram_kmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.ttm_bo_kmap
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.__ioremap_caller
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.ioremap_page_range
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.pmd_free_pte_page
8.19 ± 96% +2.2 10.43 ±173% perf-profile.children.cycles-pp.flush_tlb_kernel_range
9.71 ± 94% +2.4 12.15 ±173% perf-profile.children.cycles-pp.on_each_cpu
9.71 ± 94% +2.4 12.15 ±173% perf-profile.children.cycles-pp.smp_call_function_many
0.07 ± 65% +6.3 6.34 ±169% perf-profile.children.cycles-pp.handle_mm_fault
0.06 ± 68% +6.3 6.34 ±170% perf-profile.children.cycles-pp.__handle_mm_fault
18.50 ±116% -16.4 2.09 ±173% perf-profile.self.cycles-pp.cpu_idle_poll
15.18 ± 82% -13.8 1.35 ±161% perf-profile.self.cycles-pp.smp_call_function_single
10.18 ±125% -9.0 1.22 ±163% perf-profile.self.cycles-pp.tick_check_broadcast_expired
2.84 ± 85% -2.8 0.00 perf-profile.self.cycles-pp.mutex_spin_on_owner
9.32 ± 99% +2.8 12.11 ±173% perf-profile.self.cycles-pp.smp_call_function_many
phoronix-test-suite.noise-level.0.activity_level
220000 +-O----------------------------------------------------------------+
| O O |
200000 +-+ O O
180000 +-+ O O O O |
| O O |
160000 +-+ O O O O O O O O O |
O O O O O O |
140000 +-+ O O O |
| |
120000 +-+ |
100000 +-+ |
| |
80000 +-+ .+.. .+. .+. .+. .+.+.+..+.+.+.. .+.. .+.. |
|.+..+ + +. +..+.+.+. +. + +.+ +.+ |
60000 +-+----------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
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,
Rong Chen
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