[lkp] [perf] bd2afa49d1: -20.7% will-it-scale.per_thread_ops

From: kernel test robot
Date: Tue Mar 08 2016 - 02:04:33 EST

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FYI, we noticed the will-it-scale.per_thread_ops -20.7% regression on

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit bd2afa49d194c6412c333e9fdd48bc5d06bb465d ("perf: Fix scaling vs. perf_event_enable()")

=========================================================================================
compiler/kconfig/rootfs/tbox_group/test/testcase:
gcc-4.9/x86_64-rhel/debian-x86_64-2015-02-07.cgz/lkp-sb03/lseek1/will-it-scale

commit:
7fce250915efca0f8f51dddee3ae89bf30d86ca5
bd2afa49d194c6412c333e9fdd48bc5d06bb465d

7fce250915efca0f bd2afa49d194c6412c333e9fdd
---------------- --------------------------
%stddev %change %stddev
\ | \
7989217 ± 0% -20.7% 6333122 ± 0% will-it-scale.per_thread_ops
0.61 ± 0% -1.3% 0.60 ± 0% will-it-scale.scalability
1762 ± 0% -4.7% 1680 ± 0% will-it-scale.time.system_time
748.10 ± 0% +11.0% 830.15 ± 0% will-it-scale.time.user_time
748.10 ± 0% +11.0% 830.15 ± 0% time.user_time
0.03 ± 40% -66.7% 0.01 ±-10000% turbostat.Pkg%pc6
1.54 ± 1% -16.4% 1.28 ± 3% perf-profile.cycles.___might_sleep.__might_sleep.mutex_lock.__fdget_pos.sys_lseek
33.95 ± 0% -15.3% 28.77 ± 0% perf-profile.cycles.__fdget_pos.sys_lseek.entry_SYSCALL_64_fastpath
14.29 ± 2% -18.4% 11.67 ± 1% perf-profile.cycles.__fget.__fget_light.__fdget_pos.sys_lseek.entry_SYSCALL_64_fastpath
14.66 ± 2% -18.1% 12.02 ± 0% perf-profile.cycles.__fget_light.__fdget_pos.sys_lseek.entry_SYSCALL_64_fastpath
3.38 ± 1% -14.1% 2.90 ± 3% perf-profile.cycles.__might_sleep.mutex_lock.__fdget_pos.sys_lseek.entry_SYSCALL_64_fastpath
12.52 ± 1% -10.9% 11.16 ± 0% perf-profile.cycles.entry_SYSCALL_64
12.72 ± 1% -17.8% 10.45 ± 1% perf-profile.cycles.entry_SYSCALL_64_after_swapgs
10.29 ± 2% -17.7% 8.47 ± 1% perf-profile.cycles.fput.entry_SYSCALL_64_fastpath
1.94 ± 5% +152.2% 4.89 ± 2% perf-profile.cycles.generic_file_llseek_size.shmem_file_llseek.sys_lseek.entry_SYSCALL_64_fastpath
0.75 ± 5% +517.3% 4.65 ± 3% perf-profile.cycles.generic_file_llseek_size.sys_lseek.entry_SYSCALL_64_fastpath
11.77 ± 2% -13.5% 10.18 ± 1% perf-profile.cycles.mutex_lock.__fdget_pos.sys_lseek.entry_SYSCALL_64_fastpath
4.59 ± 3% +180.3% 12.87 ± 4% perf-profile.cycles.shmem_file_llseek.sys_lseek.entry_SYSCALL_64_fastpath
47.83 ± 1% +12.6% 53.87 ± 0% perf-profile.cycles.sys_lseek.entry_SYSCALL_64_fastpath
35661 ± 4% +26.3% 45032 ± 18% sched_debug.cfs_rq:/.exec_clock.24
34816 ± 0% +14.1% 39725 ± 14% sched_debug.cfs_rq:/.exec_clock.25
33735 ± 4% -31.2% 23222 ± 37% sched_debug.cfs_rq:/.exec_clock.8
804888 ± 3% +25.5% 1010094 ± 15% sched_debug.cfs_rq:/.min_vruntime.24
709991 ± 3% -30.1% 496149 ± 31% sched_debug.cfs_rq:/.min_vruntime.min
4.25 ± 13% -24.5% 3.21 ± 2% sched_debug.cfs_rq:/.nr_spread_over.max
1.17 ± 8% -19.6% 0.94 ± 5% sched_debug.cfs_rq:/.nr_spread_over.stddev
-585558 ± -4% +28.1% -750273 ±-13% sched_debug.cfs_rq:/.spread0.8
-595168 ± -3% +29.4% -770251 ±-14% sched_debug.cfs_rq:/.spread0.min
561.50 ± 4% -6.6% 524.25 ± 4% sched_debug.cfs_rq:/.util_avg.12
411.50 ± 14% -13.9% 354.50 ± 1% sched_debug.cfs_rq:/.util_avg.23
173.25 ± 1% +12.8% 195.50 ± 10% sched_debug.cfs_rq:/.util_avg.26
53711 ± 4% +16.0% 62301 ± 9% sched_debug.cpu.nr_load_updates.24
10450 ± 12% -22.0% 8153 ± 12% sched_debug.cpu.nr_switches.0
14829 ± 16% +32.3% 19618 ± 18% sched_debug.cpu.nr_switches.11
7613 ± 30% -59.2% 3109 ± 11% sched_debug.cpu.nr_switches.29
33333 ± 5% +47.8% 49256 ± 22% sched_debug.cpu.nr_switches.max
8197 ± 3% +32.3% 10843 ± 12% sched_debug.cpu.nr_switches.stddev
1.00 ±187% -600.0% -5.00 ±-54% sched_debug.cpu.nr_uninterruptible.11
16912 ± 19% +203.2% 51277 ± 64% sched_debug.cpu.sched_count.10
7914 ± 31% -60.3% 3144 ± 11% sched_debug.cpu.sched_count.29
3798 ± 39% +57.9% 5998 ± 30% sched_debug.cpu.sched_count.3
4658 ± 9% +90.7% 8886 ± 67% sched_debug.cpu.sched_goidle.14
3051 ± 2% +11.2% 3394 ± 4% sched_debug.cpu.sched_goidle.avg
13064 ± 9% +62.4% 21213 ± 29% sched_debug.cpu.sched_goidle.max
3266 ± 4% +41.9% 4634 ± 15% sched_debug.cpu.sched_goidle.stddev
6316 ± 13% -41.4% 3703 ± 7% sched_debug.cpu.ttwu_count.14
17502 ± 10% +82.7% 31976 ± 15% sched_debug.cpu.ttwu_count.max
4063 ± 5% +53.3% 6230 ± 11% sched_debug.cpu.ttwu_count.stddev
1733 ± 31% +49.4% 2591 ± 13% sched_debug.cpu.ttwu_local.11
899.00 ± 29% +76.7% 1588 ± 22% sched_debug.cpu.ttwu_local.27

=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase:
gcc-4.9/performance/x86_64-rhel/debian-x86_64-2015-02-07.cgz/lkp-sbx04/lseek1/will-it-scale

commit:
7fce250915efca0f8f51dddee3ae89bf30d86ca5
bd2afa49d194c6412c333e9fdd48bc5d06bb465d

7fce250915efca0f bd2afa49d194c6412c333e9fdd
---------------- --------------------------
%stddev %change %stddev
\ | \
7619716 ± 0% -21.2% 6008133 ± 0% will-it-scale.per_thread_ops
0.60 ± 0% -2.6% 0.58 ± 0% will-it-scale.scalability
2982 ± 0% -4.8% 2838 ± 0% will-it-scale.time.system_time
1262 ± 0% +11.4% 1406 ± 0% will-it-scale.time.user_time
1262 ± 0% +11.4% 1406 ± 0% time.user_time
21294 ± 1% +9.4% 23298 ± 2% slabinfo.anon_vma_chain.active_objs
21294 ± 1% +9.4% 23298 ± 2% slabinfo.anon_vma_chain.num_objs
13408 ± 1% -14.4% 11482 ± 3% slabinfo.kmalloc-512.active_objs
13547 ± 1% -12.9% 11804 ± 3% slabinfo.kmalloc-512.num_objs
2.00 ± 0% +212.5% 6.25 ± 34% sched_debug.cfs_rq:/.load.27
2.50 ± 20% +1650.0% 43.75 ± 84% sched_debug.cfs_rq:/.load_avg.18
11.50 ± 4% -10.9% 10.25 ± 4% sched_debug.cfs_rq:/.load_avg.46
1133547 ± 15% -14.8% 965376 ± 0% sched_debug.cfs_rq:/.min_vruntime.57
2.00 ±-50% +12.5% 2.25 ± 57% sched_debug.cfs_rq:/.nr_spread_over.9
5.54 ± 29% -33.1% 3.71 ± 30% sched_debug.cfs_rq:/.nr_spread_over.max
0.98 ± 8% -14.8% 0.83 ± 7% sched_debug.cfs_rq:/.nr_spread_over.stddev
3.00 ± 0% -33.3% 2.00 ± 0% sched_debug.cfs_rq:/.runnable_load_avg.31
172.50 ± 1% +15.2% 198.75 ± 14% sched_debug.cfs_rq:/.util_avg.21
176.00 ± 0% +44.5% 254.25 ± 28% sched_debug.cfs_rq:/.util_avg.26
17.60 ± 5% -8.5% 16.11 ± 6% sched_debug.cpu.cpu_load[3].stddev
1792 ± 0% +27.7% 2289 ± 31% sched_debug.cpu.curr->pid.16
1793 ± 0% +25.4% 2248 ± 28% sched_debug.cpu.curr->pid.21
48688 ± 3% +6.1% 51640 ± 3% sched_debug.cpu.nr_load_updates.63
14390 ± 25% -70.2% 4282 ± 52% sched_debug.cpu.nr_switches.23
1180 ± 10% +19.8% 1414 ± 15% sched_debug.cpu.nr_switches.47
3051 ± 55% -57.1% 1309 ± 6% sched_debug.cpu.nr_switches.50
1604 ± 46% +111.0% 3385 ± 60% sched_debug.cpu.nr_switches.52
2296 ± 37% +103.1% 4664 ± 32% sched_debug.cpu.nr_switches.59
2199 ± 20% +95.1% 4292 ± 39% sched_debug.cpu.nr_switches.60
1960 ± 17% +49.9% 2939 ± 14% sched_debug.cpu.nr_switches.63
-18.75 ±-19% +62.7% -30.50 ±-21% sched_debug.cpu.nr_uninterruptible.0
-2.00 ±-86% -162.5% 1.25 ±103% sched_debug.cpu.nr_uninterruptible.19
-1.75 ±-123% -171.4% 1.25 ±103% sched_debug.cpu.nr_uninterruptible.27
1.25 ±153% +360.0% 5.75 ± 35% sched_debug.cpu.nr_uninterruptible.32
3.50 ± 84% -71.4% 1.00 ±254% sched_debug.cpu.nr_uninterruptible.46
-18.50 ±-18% +62.6% -30.08 ±-21% sched_debug.cpu.nr_uninterruptible.min
4732118 ± 0% +27.7% 6043638 ± 0% sched_debug.cpu.sched_count.0
16580 ±100% -73.9% 4329 ± 47% sched_debug.cpu.sched_count.1
14410 ± 24% -70.2% 4297 ± 52% sched_debug.cpu.sched_count.23
11351 ± 43% +159.5% 29460 ± 46% sched_debug.cpu.sched_count.27
5346 ± 55% -50.1% 2669 ± 35% sched_debug.cpu.sched_count.4
3061 ± 55% -56.9% 1320 ± 5% sched_debug.cpu.sched_count.50
1614 ± 46% +110.6% 3399 ± 60% sched_debug.cpu.sched_count.52
2035 ± 8% +59.1% 3238 ± 11% sched_debug.cpu.sched_count.57
2310 ± 37% +105.8% 4754 ± 33% sched_debug.cpu.sched_count.59
2218 ± 20% +122.3% 4931 ± 36% sched_debug.cpu.sched_count.60
1973 ± 17% +91.8% 3785 ± 37% sched_debug.cpu.sched_count.63
80242 ± 0% +26.0% 101102 ± 0% sched_debug.cpu.sched_count.avg
4732118 ± 0% +27.7% 6043638 ± 0% sched_debug.cpu.sched_count.max
586184 ± 0% +27.7% 748781 ± 0% sched_debug.cpu.sched_count.stddev
4320 ± 46% -64.8% 1520 ± 9% sched_debug.cpu.sched_goidle.20
2161 ± 73% -53.1% 1012 ± 22% sched_debug.cpu.sched_goidle.4
622.00 ± 25% -19.3% 502.25 ± 20% sched_debug.cpu.sched_goidle.44
1063 ± 38% -53.4% 496.00 ± 7% sched_debug.cpu.sched_goidle.50
480.50 ± 10% +39.0% 667.75 ± 33% sched_debug.cpu.sched_goidle.53
925.50 ± 43% +115.9% 1998 ± 39% sched_debug.cpu.sched_goidle.59
754.75 ± 6% +59.7% 1205 ± 14% sched_debug.cpu.sched_goidle.63
8103 ± 6% -11.0% 7214 ± 6% sched_debug.cpu.ttwu_count.0
1831 ± 23% +69.1% 3095 ± 10% sched_debug.cpu.ttwu_count.15
2932 ± 23% -47.1% 1550 ± 22% sched_debug.cpu.ttwu_count.18
4208 ± 27% -59.6% 1702 ± 20% sched_debug.cpu.ttwu_count.19
4212 ± 39% -69.9% 1268 ± 24% sched_debug.cpu.ttwu_count.23
5265 ± 45% -44.9% 2901 ± 16% sched_debug.cpu.ttwu_count.27
3700 ± 24% +71.1% 6331 ± 48% sched_debug.cpu.ttwu_count.28
2916 ± 90% -65.1% 1017 ± 14% sched_debug.cpu.ttwu_count.4
2347 ± 50% -62.8% 874.25 ± 77% sched_debug.cpu.ttwu_count.44
5181 ± 49% -78.6% 1107 ± 66% sched_debug.cpu.ttwu_count.46
1745 ± 28% +174.4% 4789 ± 27% sched_debug.cpu.ttwu_count.9
1182 ± 79% -63.6% 430.00 ± 13% sched_debug.cpu.ttwu_local.18
2470 ± 56% -78.6% 529.25 ± 30% sched_debug.cpu.ttwu_local.19
3327 ± 46% -86.4% 452.25 ± 33% sched_debug.cpu.ttwu_local.23
1156 ± 40% +66.5% 1925 ± 33% sched_debug.cpu.ttwu_local.24
1589 ± 9% -28.6% 1134 ± 10% sched_debug.cpu.ttwu_local.27
349.50 ± 27% -34.5% 229.00 ± 40% sched_debug.cpu.ttwu_local.33
126.50 ± 15% +43.1% 181.00 ± 18% sched_debug.cpu.ttwu_local.38
1126 ± 62% -62.2% 425.75 ± 34% sched_debug.cpu.ttwu_local.4
381.00 ± 21% +145.7% 936.00 ± 35% sched_debug.cpu.ttwu_local.59

lkp-sb03: Sandy Bridge-EP
Memory: 64G

lkp-sbx04: Sandy Bridge-EX
Memory: 64G

will-it-scale.per_thread_ops

9e+06 ++------------------------------------------------------------------+
*. .*.*.*. .*.* |
8e+06 ++*. *..*.*.*.*..*.*.*.*..*.*.*..*.*.*.*..*.* : *.*.*..*.*
7e+06 O+O O O O O O O O O O : : |
| O O O O : : |
6e+06 ++ : : |
5e+06 ++ : : |
| : : |
4e+06 ++ : : |
3e+06 ++ : : |
| : : |
2e+06 ++ : : |
1e+06 ++ : |
| : |
0 ++-------------------------------------------------------*----------+

will-it-scale.time.system_time

1800 *+*--*-*-*--*-*-*-*--*-*-*--*-*-*--*-*-*-*--*-*-*--*-*-*----*-*-*--*-*
O O O O O O O O O O O O O O O : : |
1600 ++ : : |
1400 ++ : : |
| : : |
1200 ++ : : |
1000 ++ : : |
| : : |
800 ++ : : |
600 ++ : : |
| : : |
400 ++ :: |
200 ++ : |
| : |
0 ++--------------------------------------------------------*----------+

[*] 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.
---
LKP_SERVER: inn
LKP_CGI_PORT: 80
LKP_CIFS_PORT: 139
testcase: will-it-scale
default-monitors:
wait: activate-monitor
kmsg:
uptime:
iostat:
heartbeat:
vmstat:
numa-numastat:
numa-vmstat:
numa-meminfo:
proc-vmstat:
proc-stat:
interval: 10
meminfo:
slabinfo:
interrupts:
lock_stat:
latency_stats:
softirqs:
bdi_dev_mapping:
diskstats:
nfsstat:
cpuidle:
cpufreq-stats:
turbostat:
pmeter:
sched_debug:
interval: 60
cpufreq_governor:
default-watchdogs:
oom-killer:
watchdog:
commit: bd2afa49d194c6412c333e9fdd48bc5d06bb465d
model: Sandy Bridge-EP
memory: 64G
hdd_partitions: "/dev/disk/by-id/ata-WDC_WD10EARS-00Y5B1_WD-WCAV5F059499-part3"
swap_partitions:
rootfs_partition: "/dev/disk/by-id/ata-WDC_WD10EARS-00Y5B1_WD-WCAV5F059499-part4"
category: benchmark
perf-profile:
freq: 800
will-it-scale:
test: lseek1
queue: bisect
testbox: lkp-sb03
tbox_group: lkp-sb03
kconfig: x86_64-rhel
enqueue_time: 2016-03-07 15:24:58.319316905 +08:00
compiler: gcc-4.9
rootfs: debian-x86_64-2015-02-07.cgz
id: 1ce184419170460ef4224167293c72561fc7ac35
user: lkp
head_commit: 75c7339113a355b83f63747e6699c3028d4bf362
base_commit: fc77dbd34c5c99bce46d40a2491937c3bcbd10af
branch: linux-devel/devel-hourly-2016030614
result_root: "/result/will-it-scale/lseek1/lkp-sb03/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/bd2afa49d194c6412c333e9fdd48bc5d06bb465d/0"
job_file: "/lkp/scheduled/lkp-sb03/bisect_will-it-scale-lseek1-debian-x86_64-2015-02-07.cgz-x86_64-rhel-bd2afa49d194c6412c333e9fdd48bc5d06bb465d-20160307-105931-ltzmsq-0.yaml"
nr_cpu: "$(nproc)"
max_uptime: 1500
initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz"
bootloader_append:
- root=/dev/ram0
- user=lkp
- job=/lkp/scheduled/lkp-sb03/bisect_will-it-scale-lseek1-debian-x86_64-2015-02-07.cgz-x86_64-rhel-bd2afa49d194c6412c333e9fdd48bc5d06bb465d-20160307-105931-ltzmsq-0.yaml
- ARCH=x86_64
- kconfig=x86_64-rhel
- branch=linux-devel/devel-hourly-2016030614
- commit=bd2afa49d194c6412c333e9fdd48bc5d06bb465d
- BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/bd2afa49d194c6412c333e9fdd48bc5d06bb465d/vmlinuz-4.5.0-rc5-00216-gbd2afa4
- max_uptime=1500
- RESULT_ROOT=/result/will-it-scale/lseek1/lkp-sb03/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/bd2afa49d194c6412c333e9fdd48bc5d06bb465d/0
- LKP_SERVER=inn
- |2-

earlyprintk=ttyS0,115200 systemd.log_level=err
debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100
panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0
console=ttyS0,115200 console=tty0 vga=normal

rw
lkp_initrd: "/lkp/lkp/lkp-x86_64.cgz"
modules_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/bd2afa49d194c6412c333e9fdd48bc5d06bb465d/modules.cgz"
bm_initrd: "/osimage/deps/debian-x86_64-2015-02-07.cgz/lkp.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/run-ipconfig.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/turbostat.cgz,/lkp/benchmarks/turbostat.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/will-it-scale.cgz,/lkp/benchmarks/will-it-scale.cgz,/lkp/benchmarks/will-it-scale-x86_64.cgz"
linux_headers_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/bd2afa49d194c6412c333e9fdd48bc5d06bb465d/linux-headers.cgz"
repeat_to: 2
kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/bd2afa49d194c6412c333e9fdd48bc5d06bb465d/vmlinuz-4.5.0-rc5-00216-gbd2afa4"
dequeue_time: 2016-03-07 15:30:15.230960736 +08:00
job_state: finished
loadavg: 28.24 12.75 4.99 2/360 9047
start_time: '1457335872'
end_time: '1457336183'
version: "/lkp/lkp/.src-20160307-130139"
2016-03-07 15:31:12 ./runtest.py lseek1 25 both 1 8 16 24 32

Next message: Michal Kubecek: "Re: [PATCH net-next 2/3] ipv6: per netns fib6 walkers"
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