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Date: Fri, 19 May 2017 14:07:06 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Vincent Guittot <vincent.guittot@...aro.org>
Cc: Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Mike Galbraith <efault@....de>,
Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-robot] [sched/cfs] 625ed2bf04: unixbench.score -7.4%
regression
Greeting,
FYI, we noticed a -7.4% regression of unixbench.score due to commit:
commit: 625ed2bf049d5a352c1bcca962d6e133454eaaff ("sched/cfs: Make util/load_avg more stable")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: unixbench
on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory
with following parameters:
runtime: 300s
nr_task: 100%
test: spawn
cpufreq_governor: performance
test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system.
test-url: https://github.com/kdlucas/byte-unixbench
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
testcase/path_params/tbox_group/run: unixbench/300s-100%-spawn-performance/lkp-bdw-ep3b
8663effb24f94303 625ed2bf049d5a352c1bcca962
---------------- --------------------------
%stddev change %stddev
\ | \
8888 -7% 8234 unixbench.score
11626 31% 15267 unixbench.time.system_time
5084 23% 6259 unixbench.time.percent_of_cpu_this_job_got
5203 5% 5455 unixbench.time.user_time
66039778 -7% 61588314 unixbench.time.voluntary_context_switches
7.932e+08 -7% 7.34e+08 unixbench.time.minor_page_faults
24502668 -52% 11794316 unixbench.time.involuntary_context_switches
628084 -17% 518637 interrupts.CAL:Function_call_interrupts
6000 ± 57% 1e+04 19033 ± 58% latency_stats.sum.call_rwsem_down_read_failed.__percpu_down_read.exit_signals.do_exit.do_group_exit.SyS_exit_group.entry_SYSCALL_64_fastpath
715117 ± 58% -4e+05 300172 ± 12% latency_stats.sum.io_schedule.__lock_page_or_retry.filemap_fault.__do_fault.__handle_mm_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault
94622 96223 vmstat.system.in
500325 -16% 420024 vmstat.system.cs
1692 21% 2045 turbostat.Avg_MHz
60.71 21% 73.38 turbostat.%Busy
208 212 turbostat.PkgWatt
54.56 -8% 50.47 turbostat.RAMWatt
4.911e+13 21% 5.944e+13 perf-stat.cpu-cycles
6010 19% 7153 perf-stat.instructions-per-iTLB-miss
3.508e+12 14% 3.988e+12 perf-stat.branch-instructions
1.627e+13 10% 1.797e+13 perf-stat.instructions
4.504e+12 8% 4.886e+12 perf-stat.dTLB-loads
58.34 59.21 perf-stat.node-store-miss-rate%
42.85 42.00 perf-stat.iTLB-load-miss-rate%
3.609e+09 -4% 3.469e+09 perf-stat.iTLB-loads
2.125e+10 -5% 2.016e+10 perf-stat.branch-misses
2.707e+09 -7% 2.512e+09 perf-stat.iTLB-load-misses
7.939e+08 -7% 7.348e+08 perf-stat.page-faults
7.939e+08 -7% 7.348e+08 perf-stat.minor-faults
0.33 -9% 0.30 perf-stat.ipc
9.788e+09 -9% 8.927e+09 ± 3% perf-stat.dTLB-load-misses
14.74 -9% 13.43 perf-stat.cache-miss-rate%
3.426e+11 -9% 3.117e+11 perf-stat.cache-references
1.26e+09 -9% 1.141e+09 perf-stat.dTLB-store-misses
1.579e+12 -10% 1.421e+12 perf-stat.dTLB-stores
1.773e+10 -14% 1.523e+10 perf-stat.node-load-misses
5.685e+09 -15% 4.805e+09 perf-stat.node-store-misses
0.22 -16% 0.18 ± 3% perf-stat.dTLB-load-miss-rate%
1.666e+08 -16% 1.4e+08 perf-stat.context-switches
0.61 -17% 0.51 perf-stat.branch-miss-rate%
5.051e+10 -17% 4.187e+10 perf-stat.cache-misses
32471209 -18% 26608318 perf-stat.cpu-migrations
4.059e+09 -18% 3.311e+09 perf-stat.node-stores
8.13e+08 -24% 6.207e+08 perf-stat.node-loads
unixbench.time.involuntary_context_switches
2.6e+07 ++----------------------------------------------------------------+
*.*.*.. .*.*.*. .*.*.*. .*..*.*.*. .*..*.*.*.* |
2.4e+07 ++ * *..*.*. .*.*. * * |
2.2e+07 ++ * |
| |
2e+07 ++ |
O O O O |
1.8e+07 ++O |
| |
1.6e+07 ++ |
1.4e+07 ++ |
| |
1.2e+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 O O
1e+07 ++----------------------------------------------------------------+
perf-stat.cpu-cycles
6e+13 ++----------------------------------------------------------------+
| O O O O O O O O O O O O O O O O O O O O O O O O O O
5.8e+13 ++ |
| |
| |
5.6e+13 O+O O O |
| O |
5.4e+13 ++ |
| |
5.2e+13 ++ |
| |
| |
5e+13 ++ .*. .*.*.*..*.*.*.*. .*. .*. .*. |
*.*.*. * *..*.*.* *..*.*.* *..*.* * |
4.8e+13 ++----------------------------------------------------------------+
perf-stat.node-load-misses
1.8e+10 ++---------------------------------------------------------------+
*.*.*..*.*.*.* .*.*..*.*.*.*.*.*..*.*.*.*.*.* |
1.75e+10 ++ : * |
1.7e+10 ++ : .*. + |
| *.*. *.* |
1.65e+10 ++ |
| |
1.6e+10 ++ |
| |
1.55e+10 O+ O O O O O O O
1.5e+10 ++ O O O O O O O O |
| |
1.45e+10 ++O O O O O O O O O O O O O |
| O |
1.4e+10 ++---------------O-----------------------------------------------+
perf-stat.context-switches
1.7e+08 ++---------------------------------------------------------------+
*.*.*.. .*.*.* .*.*..*. .*.*.*.*.. .*.*.*.*.* |
1.65e+08 ++ * + * * * |
1.6e+08 ++ *. .*. + |
| *. *.* |
1.55e+08 ++ |
| |
1.5e+08 ++ |
| |
1.45e+08 O+O O O O |
1.4e+08 ++ O O O O O O O O |
| O O O O O O
1.35e+08 ++ O O O O O O O O O O |
| O O |
1.3e+08 ++---------------------------------------------------------------+
perf-stat.cpu-migrations
3.3e+07 ++-----------------------------------------------------*-*--------+
| .*..*. .*. * .*.*. .*.*. + |
3.2e+07 *+* * *. + + .*..*.* *..*.* *..*.* |
3.1e+07 ++ *..*.* * |
| |
3e+07 ++ |
| |
2.9e+07 ++ |
| |
2.8e+07 ++ |
2.7e+07 ++ |
O O O O O O O O O O O O O
2.6e+07 ++ O O O O O O |
| O O O O O O O O O O O O |
2.5e+07 ++----------------------------------------------------------------+
perf-stat.branch-miss-rate_
0.62 ++-------------------------------------------------------------------+
*. .*. .*..*.*. *..*.*. .*. .*.*.. .*. .*.*.*.. .* |
0.6 ++*. * *.*.. + *. * * *. * |
| *.* |
0.58 ++ |
| |
0.56 ++ |
| |
0.54 ++ |
| |
0.52 ++ O O |
O O O O O O |
0.5 ++ O O O O O O O O
| O O O O O O O O O O |
0.48 ++O--O---O------O------O---------------------------------------------+
perf-stat.ipc
0.335 ++------------------------------------------------------------------+
*.*..*.*.*.*..* .*..*.*.*..*.*.*.*..*.*.*.*..*.* |
0.33 ++ : *.. * |
0.325 ++ : + + |
| *.* *.* |
0.32 ++ |
| |
0.315 ++ |
| |
0.31 ++ |
0.305 ++ |
O O O O O O O O O O O O O O
0.3 ++ O O O O O |
| O O O O O O O O O O O O |
0.295 ++------------------------------------------------------------------+
perf-stat.instructions-per-iTLB-miss
7400 ++-------------------------------------------------------------------+
| O O O O O |
7200 ++O O O O O O O O O O O O O O O
7000 O+ O O O O O O O O O O |
| |
6800 ++ |
| |
6600 ++ |
| |
6400 ++ |
6200 ++ *. .*. |
*. + *..* *..*.*. .*.. |
6000 ++*..*. .*..*.* *..*. .* *.*. .*. .*..*.* |
| * * *. * |
5800 ++-------------------------------------------------------------------+
[*] 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,
Xiaolong
View attachment "config-4.12.0-rc1-00002-g625ed2b" of type "text/plain" (159405 bytes)
View attachment "job-script" of type "text/plain" (6874 bytes)
View attachment "job.yaml" of type "text/plain" (4467 bytes)
View attachment "reproduce" of type "text/plain" (127 bytes)
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