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Message-ID: <20160801015504.GA11803@yexl-desktop>
Date: Mon, 1 Aug 2016 09:55:04 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: William Roberts <william.c.roberts@...el.com>
Cc: 0day robot <fengguang.wu@...el.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] eadd46295d: hackbench.throughput -9.7% regression
FYI, we noticed a -9.7% regression of hackbench.throughput due to commit:
commit eadd46295d4e47aef2fc91e806282f61d4bfe2a2 ("Introduce mmap randomization")
https://github.com/0day-ci/linux william-c-roberts-intel-com/Introduce-mmap-randomization/20160727-023413
in testcase: hackbench
on test machine: 32 threads Sandy Bridge-EP with 32G memory
with following parameters:
nr_threads: 1600%
mode: process
ipc: pipe
cpufreq_governor: performance
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.
Details are as below:
-------------------------------------------------------------------------------------------------->
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
=========================================================================================
compiler/cpufreq_governor/ipc/kconfig/mode/nr_threads/rootfs/tbox_group/testcase:
gcc-6/performance/pipe/x86_64-rhel/process/1600%/debian-x86_64-2015-02-07.cgz/lkp-snb01/hackbench
commit:
v4.7
eadd46295d ("Introduce mmap randomization")
v4.7 eadd46295d4e47aef2fc91e806
---------------- --------------------------
fail:runs %reproduction fail:runs
| | |
%stddev %change %stddev
\ | \
235060 ± 1% -9.7% 212347 ± 0% hackbench.throughput
3.989e+08 ± 1% +12.0% 4.467e+08 ± 2% hackbench.time.involuntary_context_switches
26892935 ± 1% -11.6% 23769774 ± 1% hackbench.time.minor_page_faults
2911 ± 0% -1.6% 2864 ± 0% hackbench.time.percent_of_cpu_this_job_got
1415 ± 0% -7.1% 1315 ± 1% hackbench.time.user_time
1.59e+09 ± 0% -3.5% 1.534e+09 ± 1% hackbench.time.voluntary_context_switches
522230 ± 0% +99.2% 1040525 ± 0% meminfo.PageTables
527517 ± 3% -16.5% 440493 ± 3% softirqs.SCHED
67535 ± 7% +99.2% 134556 ± 10% numa-vmstat.node0.nr_page_table_pages
61527 ± 8% +100.6% 123407 ± 9% numa-vmstat.node1.nr_page_table_pages
6.28 ± 1% +16.9% 7.34 ± 2% turbostat.CPU%c1
171.44 ± 0% -1.7% 168.54 ± 0% turbostat.CorWatt
198.59 ± 0% -1.4% 195.72 ± 0% turbostat.PkgWatt
1.40 ±200% +507.1% 8.50 ± 64% vmstat.procs.b
1791 ± 2% -10.5% 1603 ± 1% vmstat.procs.r
155718 ± 3% -17.2% 128979 ± 6% vmstat.system.in
1624167 ± 6% +41.9% 2305196 ± 12% numa-meminfo.node0.MemUsed
272208 ± 6% +99.2% 542347 ± 10% numa-meminfo.node0.PageTables
1443799 ± 8% +37.7% 1988433 ± 12% numa-meminfo.node1.MemUsed
246214 ± 8% +100.8% 494381 ± 10% numa-meminfo.node1.PageTables
129902 ± 0% +100.5% 260449 ± 0% proc-vmstat.nr_page_table_pages
52961320 ± 1% +16.4% 61651759 ± 1% proc-vmstat.numa_hit
52961316 ± 1% +16.4% 61651755 ± 1% proc-vmstat.numa_local
5674 ± 3% -15.0% 4822 ± 6% proc-vmstat.numa_pte_updates
52794094 ± 0% +13.6% 59962331 ± 1% proc-vmstat.pgalloc_normal
28064259 ± 1% -11.4% 24875700 ± 1% proc-vmstat.pgfault
58082481 ± 1% +14.0% 66223801 ± 1% proc-vmstat.pgfree
1.044e+08 ± 1% -22.3% 81133470 ± 6% cpuidle.C1-SNB.time
19769566 ± 2% -20.9% 15634083 ± 6% cpuidle.C1-SNB.usage
40316906 ± 3% +18.4% 47742318 ± 2% cpuidle.C1E-SNB.time
461352 ± 2% +24.7% 575405 ± 2% cpuidle.C1E-SNB.usage
8978132 ± 3% +92.1% 17248854 ± 6% cpuidle.C3-SNB.time
42921 ± 2% +157.3% 110419 ± 5% cpuidle.C3-SNB.usage
1.13e+09 ± 1% +19.1% 1.346e+09 ± 1% cpuidle.C7-SNB.time
1191984 ± 1% +18.6% 1414163 ± 2% cpuidle.C7-SNB.usage
4.157e+08 ± 5% +22.0% 5.073e+08 ± 6% cpuidle.POLL.time
333689 ± 2% -19.7% 268091 ± 6% cpuidle.POLL.usage
252963 ± 0% +24.4% 314715 ± 0% slabinfo.anon_vma.active_objs
5053 ± 0% +24.1% 6273 ± 0% slabinfo.anon_vma.active_slabs
257762 ± 0% +24.1% 319960 ± 0% slabinfo.anon_vma.num_objs
5053 ± 0% +24.1% 6273 ± 0% slabinfo.anon_vma.num_slabs
516841 ± 0% +23.8% 640090 ± 0% slabinfo.anon_vma_chain.active_objs
9773 ± 0% +24.3% 12152 ± 0% slabinfo.anon_vma_chain.active_slabs
625521 ± 0% +24.3% 777796 ± 0% slabinfo.anon_vma_chain.num_objs
9773 ± 0% +24.3% 12152 ± 0% slabinfo.anon_vma_chain.num_slabs
3023 ± 7% -13.4% 2617 ± 5% slabinfo.kmalloc-2048.active_objs
3093 ± 7% -12.6% 2704 ± 5% slabinfo.kmalloc-2048.num_objs
384082 ± 0% +15.6% 444060 ± 0% slabinfo.vm_area_struct.active_objs
8845 ± 0% +15.5% 10213 ± 0% slabinfo.vm_area_struct.active_slabs
389216 ± 0% +15.5% 449404 ± 0% slabinfo.vm_area_struct.num_objs
8845 ± 0% +15.5% 10213 ± 0% slabinfo.vm_area_struct.num_slabs
7.579e+12 ± 0% -9.0% 6.896e+12 ± 1% perf-stat.branch-instructions
0.23 ± 81% +71.9% 0.40 ± 0% perf-stat.branch-miss-rate
2.993e+10 ± 1% -7.2% 2.779e+10 ± 1% perf-stat.branch-misses
2.075e+10 ± 0% -6.9% 1.932e+10 ± 2% perf-stat.cache-misses
2.076e+11 ± 0% -3.9% 1.996e+11 ± 2% perf-stat.cache-references
47671486 ± 2% -17.4% 39397933 ± 5% perf-stat.cpu-migrations
0.71 ± 83% +297.9% 2.81 ± 8% perf-stat.dTLB-load-miss-rate
1.537e+11 ± 13% +109.4% 3.22e+11 ± 6% perf-stat.dTLB-load-misses
1.268e+13 ± 0% -9.4% 1.148e+13 ± 1% perf-stat.dTLB-loads
0.26 ± 82% +243.6% 0.88 ± 6% perf-stat.dTLB-store-miss-rate
3.519e+10 ± 7% +86.0% 6.546e+10 ± 5% perf-stat.dTLB-store-misses
8.278e+12 ± 0% -9.7% 7.475e+12 ± 1% perf-stat.dTLB-stores
28076071 ± 1% -11.4% 24882928 ± 1% perf-stat.minor-faults
33.81 ± 81% +75.2% 59.24 ± 2% perf-stat.node-load-miss-rate
7.841e+09 ± 2% -8.0% 7.216e+09 ± 0% perf-stat.node-load-misses
1.398e+10 ± 3% -12.8% 1.219e+10 ± 2% perf-stat.node-loads
1.862e+09 ± 1% -5.9% 1.753e+09 ± 2% perf-stat.node-store-misses
28076036 ± 1% -11.4% 24883005 ± 1% perf-stat.page-faults
4.79 ± 11% +42.4% 6.82 ± 11% sched_debug.cfs_rq:/.load_avg.min
3425468 ± 29% +122.4% 7618598 ± 33% sched_debug.cfs_rq:/.min_vruntime.stddev
2.39 ± 34% +42.0% 3.39 ± 19% sched_debug.cfs_rq:/.runnable_load_avg.min
7846188 ± 15% +53.3% 12024520 ± 25% sched_debug.cfs_rq:/.spread0.max
3427472 ± 29% +122.4% 7622936 ± 33% sched_debug.cfs_rq:/.spread0.stddev
26.63 ± 6% +11.7% 29.74 ± 4% sched_debug.cpu.cpu_load[1].avg
3.38 ± 24% +37.8% 4.66 ± 13% sched_debug.cpu.cpu_load[1].min
26.36 ± 7% +10.9% 29.22 ± 3% sched_debug.cpu.cpu_load[2].avg
3.62 ± 18% +32.0% 4.77 ± 14% sched_debug.cpu.cpu_load[2].min
26.20 ± 7% +9.9% 28.79 ± 4% sched_debug.cpu.cpu_load[3].avg
3.71 ± 17% +35.2% 5.02 ± 10% sched_debug.cpu.cpu_load[3].min
26.04 ± 7% +9.0% 28.39 ± 4% sched_debug.cpu.cpu_load[4].avg
3.87 ± 15% +29.1% 5.00 ± 9% sched_debug.cpu.cpu_load[4].min
618.52 ± 35% +64.0% 1014 ± 28% sched_debug.cpu.load.min
1690 ± 9% +11.2% 1879 ± 4% sched_debug.cpu.nr_load_updates.stddev
42.20 ± 9% -20.8% 33.44 ± 15% sched_debug.cpu.nr_running.avg
1893966 ± 29% +88.1% 3562142 ± 30% sched_debug.cpu.nr_switches.stddev
137.38 ± 34% +76.2% 242.00 ± 26% sched_debug.cpu.nr_uninterruptible.max
-226.63 ±-62% +159.2% -587.52 ±-23% sched_debug.cpu.nr_uninterruptible.min
82.30 ± 39% +112.4% 174.81 ± 18% sched_debug.cpu.nr_uninterruptible.stddev
1.96 ±200% +405.1% 9.90 ± 0% sched_debug.rt_rq:/.rt_runtime.stddev
0.12 ±200% +845.6% 1.17 ± 7% perf-profile.cycles.__fget_light.sys_read.entry_SYSCALL_64_fastpath
0.23 ±123% +457.7% 1.30 ± 7% perf-profile.cycles.__fget_light.sys_write.entry_SYSCALL_64_fastpath
1.09 ± 16% +22.3% 1.34 ± 7% perf-profile.cycles.__inode_security_revalidate.selinux_file_permission.security_file_permission.rw_verify_area.vfs_write
29.47 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.__read_nocancel
0.76 ± 21% +94.0% 1.48 ± 11% perf-profile.cycles.__schedule.schedule.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
2.29 ± 11% +24.8% 2.86 ± 4% perf-profile.cycles.__schedule.schedule.pipe_wait.pipe_write.__vfs_write
0.46 ± 89% +232.4% 1.52 ± 5% perf-profile.cycles.__switch_to
7.99 ± 76% +228.6% 26.27 ± 0% perf-profile.cycles.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath
16.43 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.__vfs_read.vfs_read.sys_read.entry_SYSCALL_64_fastpath.__read_nocancel
10.74 ± 74% +219.8% 34.34 ± 2% perf-profile.cycles.__vfs_write.vfs_write.sys_write.entry_SYSCALL_64_fastpath
20.33 ± 36% -100.0% 0.00 ± -1% perf-profile.cycles.__vfs_write.vfs_write.sys_write.entry_SYSCALL_64_fastpath.__write_nocancel
7.59 ± 14% +28.7% 9.77 ± 14% perf-profile.cycles.__wake_up_common.__wake_up_sync_key.pipe_write.__vfs_write.vfs_write
10.41 ± 10% +22.3% 12.73 ± 11% perf-profile.cycles.__wake_up_sync_key.pipe_write.__vfs_write.vfs_write.sys_write
32.88 ± 35% -100.0% 0.00 ± -1% perf-profile.cycles.__write_nocancel
3.43 ± 10% +30.3% 4.46 ± 7% perf-profile.cycles.activate_task.ttwu_do_activate.try_to_wake_up.default_wake_function.autoremove_wake_function
7.18 ± 15% +29.9% 9.33 ± 14% perf-profile.cycles.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_write.__vfs_write
4.77 ± 18% -100.0% 0.00 ± -1% perf-profile.cycles.call_cpuidle.cpu_startup_entry.start_secondary
5.06 ± 16% -93.9% 0.31 ±100% perf-profile.cycles.cpu_startup_entry.start_secondary
4.76 ± 18% -100.0% 0.00 ± -1% perf-profile.cycles.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary
4.72 ± 18% -100.0% 0.00 ± -1% perf-profile.cycles.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary
0.72 ± 20% +63.1% 1.17 ± 3% perf-profile.cycles.deactivate_task.__schedule.schedule.pipe_wait.pipe_write
1.63 ± 10% +19.2% 1.94 ± 3% perf-profile.cycles.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_read
7.09 ± 15% +29.9% 9.21 ± 14% perf-profile.cycles.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_write
1.61 ± 17% +51.5% 2.45 ± 8% perf-profile.cycles.dequeue_entity.dequeue_task_fair.deactivate_task.__schedule.schedule
2.27 ± 16% +38.3% 3.15 ± 8% perf-profile.cycles.dequeue_task_fair.deactivate_task.__schedule.schedule.pipe_wait
2.16 ± 14% +49.9% 3.24 ± 7% perf-profile.cycles.enqueue_entity.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up
2.76 ± 9% +41.8% 3.92 ± 7% perf-profile.cycles.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up.default_wake_function
0.57 ± 87% +255.6% 2.02 ± 7% perf-profile.cycles.entry_SYSCALL_64
0.56 ± 85% +272.8% 2.10 ± 7% perf-profile.cycles.entry_SYSCALL_64_after_swapgs
28.04 ± 74% +227.8% 91.93 ± 0% perf-profile.cycles.entry_SYSCALL_64_fastpath
26.07 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.entry_SYSCALL_64_fastpath.__read_nocancel
29.86 ± 35% -100.0% 0.00 ± -1% perf-profile.cycles.entry_SYSCALL_64_fastpath.__write_nocancel
0.51 ± 88% +221.4% 1.63 ± 11% perf-profile.cycles.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
0.60 ± 57% +103.9% 1.22 ± 23% perf-profile.cycles.idle_cpu.select_idle_sibling.select_task_rq_fair.try_to_wake_up.default_wake_function
1.75 ± 6% -26.9% 1.28 ± 3% perf-profile.cycles.mutex_unlock.__vfs_write.vfs_write.sys_write.entry_SYSCALL_64_fastpath
0.63 ± 54% +97.8% 1.25 ± 9% perf-profile.cycles.pick_next_task_fair.__schedule.schedule.pipe_wait.pipe_read
2.98 ± 13% +27.0% 3.78 ± 7% perf-profile.cycles.pipe_wait.pipe_write.__vfs_write.vfs_write.sys_write
27.29 ± 3% +13.8% 31.05 ± 3% perf-profile.cycles.pipe_write.__vfs_write.vfs_write.sys_write.entry_SYSCALL_64_fastpath
4.60 ± 18% -100.0% 0.00 ± -1% perf-profile.cycles.poll_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry
2.34 ± 76% +252.6% 8.25 ± 7% perf-profile.cycles.rw_verify_area.vfs_read.sys_read.entry_SYSCALL_64_fastpath
5.54 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.rw_verify_area.vfs_read.sys_read.entry_SYSCALL_64_fastpath.__read_nocancel
1.93 ± 75% +261.3% 6.98 ± 7% perf-profile.cycles.rw_verify_area.vfs_write.sys_write.entry_SYSCALL_64_fastpath
4.56 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.rw_verify_area.vfs_write.sys_write.entry_SYSCALL_64_fastpath.__write_nocancel
0.49 ± 88% +223.6% 1.57 ± 11% perf-profile.cycles.schedule.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath
2.40 ± 11% +24.2% 2.98 ± 4% perf-profile.cycles.schedule.pipe_wait.pipe_write.__vfs_write.vfs_write
1.56 ± 14% +80.1% 2.82 ± 13% perf-profile.cycles.select_idle_sibling.select_task_rq_fair.try_to_wake_up.default_wake_function.autoremove_wake_function
2.70 ± 16% +50.0% 4.04 ± 14% perf-profile.cycles.select_task_rq_fair.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common
5.14 ± 7% +10.2% 5.67 ± 7% perf-profile.cycles.selinux_file_permission.security_file_permission.rw_verify_area.vfs_read.sys_read
5.12 ± 8% +13.1% 5.80 ± 8% perf-profile.cycles.selinux_file_permission.security_file_permission.rw_verify_area.vfs_write.sys_write
5.07 ± 16% -93.8% 0.31 ±100% perf-profile.cycles.start_secondary
11.81 ± 76% +234.1% 39.47 ± 2% perf-profile.cycles.sys_read.entry_SYSCALL_64_fastpath
25.48 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.sys_read.entry_SYSCALL_64_fastpath.__read_nocancel
14.31 ± 74% +230.0% 47.23 ± 0% perf-profile.cycles.sys_write.entry_SYSCALL_64_fastpath
28.76 ± 35% -100.0% 0.00 ± -1% perf-profile.cycles.sys_write.entry_SYSCALL_64_fastpath.__write_nocancel
0.53 ± 88% +224.8% 1.72 ± 11% perf-profile.cycles.syscall_return_slowpath.entry_SYSCALL_64_fastpath
8.56 ± 14% +27.6% 10.92 ± 12% perf-profile.cycles.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key
4.07 ± 9% +28.1% 5.21 ± 8% perf-profile.cycles.ttwu_do_activate.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common
11.13 ± 76% +233.3% 37.10 ± 1% perf-profile.cycles.vfs_read.sys_read.entry_SYSCALL_64_fastpath
23.80 ± 34% -100.0% 0.00 ± -1% perf-profile.cycles.vfs_read.sys_read.entry_SYSCALL_64_fastpath.__read_nocancel
13.60 ± 74% +227.9% 44.58 ± 0% perf-profile.cycles.vfs_write.sys_write.entry_SYSCALL_64_fastpath
27.07 ± 35% -100.0% 0.00 ± -1% perf-profile.cycles.vfs_write.sys_write.entry_SYSCALL_64_fastpath.__write_nocancel
2.10 ± 5% +18.3% 2.48 ± 6% perf-profile.func.cycles.__fget_light
1.07 ± 5% +23.6% 1.33 ± 7% perf-profile.func.cycles.__inode_security_revalidate
1.09 ± 35% -100.0% 0.00 ± -1% perf-profile.func.cycles.__read_nocancel
1.48 ± 8% +17.9% 1.75 ± 4% perf-profile.func.cycles.__switch_to
0.86 ± 37% -100.0% 0.00 ± -1% perf-profile.func.cycles.__write_nocancel
2.83 ± 3% -18.5% 2.30 ± 3% perf-profile.func.cycles.mutex_unlock
2.07 ± 2% +15.8% 2.39 ± 4% perf-profile.func.cycles.pipe_read
2.46 ± 5% +17.0% 2.88 ± 5% perf-profile.func.cycles.pipe_write
4.75 ± 19% -100.0% 0.00 ± -1% perf-profile.func.cycles.poll_idle
3.47 ± 8% +26.9% 4.40 ± 6% perf-profile.func.cycles.selinux_file_permission
1.26 ± 8% +12.7% 1.42 ± 4% perf-profile.func.cycles.switch_mm_irqs_off
0.94 ± 12% +24.2% 1.17 ± 12% perf-profile.func.cycles.update_curr
1.62 ± 7% +15.3% 1.87 ± 8% perf-profile.func.cycles.vfs_write
hackbench.throughput
250000 ++-----------------------------------------------------------------+
*..*..*.*..*..*..*..*.*..*..*..*..*.*..*..*..*.*..*..*..* |
O O O O O O O O O O O O O O O O O O O O O O O O
200000 ++ |
| |
| |
150000 ++ |
| |
100000 ++ |
| |
| |
50000 ++ |
| |
| |
0 ++--------------------------O--------------------------------------+
hackbench.time.percent_of_cpu_this_job_got
3000 *+-*--*--*--*-*--*--*--*--*--*--*--*-*--*--*--*--*--*--*--*----------+
O O O O O O O O O O O O O O O O O O O O O O O O
2500 ++ |
| |
| |
2000 ++ |
| |
1500 ++ |
| |
1000 ++ |
| |
| |
500 ++ |
| |
0 ++---------------------------O---------------------------------------+
hackbench.time.minor_page_faults
3e+07 ++----------------------------------------------------------------+
| .*. .*.. .*. .*.. .*.. .*. .* |
2.5e+07 *+.*. *. *. *..*..*..*.*..*. * *..*. *. |
O O O O O O O O O O O O O O O O O O O O O O O O
| |
2e+07 ++ |
| |
1.5e+07 ++ |
| |
1e+07 ++ |
| |
| |
5e+06 ++ |
| |
0 ++--------------------------O-------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Thanks,
Xiaolong
View attachment "config-4.7.0-00001-geadd462" of type "text/plain" (150956 bytes)
View attachment "job.yaml" of type "text/plain" (3649 bytes)
View attachment "reproduce" of type "text/plain" (2375 bytes)
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