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Date: Mon, 14 Aug 2017 14:03:25 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>, Josef Bacik <josef@...icpanda.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Mike Galbraith <efault@....de>, Rik van Riel <riel@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-robot] [sched/fair] 90001d67be: netperf.Throughput_tps -16.2%
regression
Greeting,
FYI, we noticed a -16.2% regression of netperf.Throughput_tps due to commit:
commit: 90001d67be2fa2acbe3510d1f64fa6533efa30ef ("sched/fair: Fix wake_affine() for !NUMA_BALANCING")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: netperf
on test machine: 8 threads Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz with 8G memory
with following parameters:
ip: ipv4
runtime: 300s
nr_threads: 200%
cluster: cs-localhost
test: TCP_RR
cpufreq_governor: performance
test-description: Netperf is a benchmark that can be use to measure various aspect of networking performance.
test-url: http://www.netperf.org/netperf/
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: netperf/ipv4-300s-200%-cs-localhost-TCP_RR-performance/lkp-hsw-d01
20435d84e5f2041c 90001d67be2fa2acbe3510d1f6
---------------- --------------------------
40233 -16% 33701 netperf.Throughput_tps
1.91e+08 -16% 1.609e+08 netperf.time.voluntary_context_switches
1096 1075 netperf.time.system_time
395 -4% 381 netperf.time.percent_of_cpu_this_job_got
95.58 -23% 73.89 netperf.time.user_time
22125 21748 interrupts.CAL:Function_call_interrupts
21198 20% 25506 vmstat.system.in
1295567 -8% 1192531 vmstat.system.cs
2026 -10% 1830 perf-stat.instructions-per-iTLB-miss
1.546e+10 -6% 1.459e+10 perf-stat.branch-misses
5.359e+10 114% 1.145e+11 perf-stat.cache-references
2.411e+10 -10% 2.16e+10 perf-stat.iTLB-loads
1.106e+12 -14% 9.496e+11 perf-stat.dTLB-stores
5842994 ± 9% 30% 7571350 ± 3% perf-stat.cache-misses
1.55 14% 1.78 perf-stat.cpi
724073 ± 3% 34% 968098 ± 3% perf-stat.node-stores
1.46 9% 1.59 perf-stat.branch-miss-rate%
0.64 -13% 0.56 perf-stat.ipc
0.01 ± 10% -39% 0.01 ± 4% perf-stat.cache-miss-rate%
1.06e+12 -14% 9.171e+11 perf-stat.branch-instructions
8.826e+12 8.715e+12 perf-stat.cpu-cycles
1.699e+12 -14% 1.456e+12 perf-stat.dTLB-loads
5.686e+12 -14% 4.905e+12 perf-stat.instructions
1.417e+09 -13% 1.228e+09 perf-stat.dTLB-store-misses
0.19 29% 0.25 ± 4% perf-stat.dTLB-load-miss-rate%
3.296e+09 10% 3.632e+09 ± 4% perf-stat.dTLB-load-misses
10.43 6% 11.04 perf-stat.iTLB-load-miss-rate%
40164 ± 23% 66526% 26759987 perf-stat.cpu-migrations
3731528 ± 4% 32% 4923150 ± 3% perf-stat.node-loads
2.807e+09 -5% 2.68e+09 perf-stat.iTLB-load-misses
3.935e+08 -8% 3.613e+08 perf-stat.context-switches
netperf.Throughput_tps
43000 ++------------------------------------------------------------------+
42000 ++ .*..*.*..*.* |
| .*.*. + |
41000 ++ *. + .*..*.*.. |
40000 ++ + *..* *..*.*..*..* |
| + |
39000 *+.*.*..*.* |
38000 ++ |
37000 ++ |
| |
36000 ++ |
35000 ++ |
| O O O O O O O O O |
34000 O+ O O O O O O O O O O O O O O O
33000 ++----------------O--O----------------------------------------------+
perf-stat.cpu-cycles
8.84e+12 ++---------------------------------------------------------------+
*..*.*..*.*..*.*..*.*..*.*..*.*..*.*..*.*..*. .*.*..*.* |
8.82e+12 ++ *. |
| |
8.8e+12 ++ |
| |
8.78e+12 ++ |
| |
8.76e+12 ++ |
| |
8.74e+12 ++ |
| |
8.72e+12 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 O
8.7e+12 ++---------------------------------------------------------------+
perf-stat.cache-references
1.3e+11 ++----------------------------------------------------------------+
| O O O O O O O O O O |
1.2e+11 O+ O O O O O O O O O
1.1e+11 ++ O O O O O O O |
| |
1e+11 ++ |
9e+10 ++ |
| |
8e+10 ++ |
7e+10 ++ |
*..*. .* |
6e+10 ++ *..* + |
5e+10 ++ + .*..*.*.. .*..*.*..*.*..*.*..*.*..* |
| * *.*..*.*. |
4e+10 ++----------------------------------------------------------------+
perf-stat.cpu-migrations
3e+07 ++----------------------------------------------------------------+
| O O O O O O O O O O |
2.5e+07 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 *+-*-*--*-*--*-*--*-*--*-*--*-*--*--*-*--*-*--*-*--*-*--*---------+
[*] 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-4.13.0-rc4-00160-g90001d67" of type "text/plain" (160946 bytes)
View attachment "job-script" of type "text/plain" (7092 bytes)
View attachment "job.yaml" of type "text/plain" (4603 bytes)
View attachment "reproduce" of type "text/plain" (1072 bytes)
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