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Date: Wed, 22 Feb 2017 12:33:47 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Xin Long <lucien.xin@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
"Fabio M. Di Nitto" <fdinitto@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-robot] [sctp] cd2b708750: netperf.Throughput_tps 90.2%
improvement
Greeting,
FYI, we noticed a 90.2% improvement of netperf.Throughput_tps due to commit:
commit: cd2b708750582e327789d8fb07c6eb5f79f7759f ("sctp: check duplicate node before inserting a new transport")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: netperf
on test machine: qemu-system-x86_64 -enable-kvm -cpu kvm64,+ssse3 -m 1G
with following parameters:
ip: ipv4
runtime: 300s
nr_threads: 1
cluster: cs-localhost
test: SCTP_RR
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 git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
testcase/path_params/tbox_group/run: netperf/ipv4-300s-1-cs-localhost-SCTP_RR/vm-lkp-wsx03-1G
7e1392fb94a7f354 cd2b708750582e327789d8fb07
---------------- --------------------------
%stddev change %stddev
\ | \
135 90% 257 netperf.Throughput_tps
631 ± 4% 206% 1930 netperf.time.voluntary_context_switches
41170 87% 77054 netperf.time.involuntary_context_switches
12 ± 4% 28% 16 netperf.time.percent_of_cpu_this_job_got
39.46 27% 50.29 netperf.time.system_time
2134 68% 3588 vmstat.system.cs
565 27% 718 vmstat.system.in
netperf.Throughput_tps
400 ++--------------------------------------------------------------------+
| |
350 O+ O |
| |
| |
300 ++ O O O O O |
| O O O O O O O O O O O O O O O O O O O |
250 ++O O O O O O O O O
| |
200 ++ |
| * * |
| + + + + |
150 *+*.* *.*.*.*.*..*.* *.*.*.*.*. .*.*.*.*.*..*.*.*.*.*.*.*.*.*
| *.*.*.* |
100 ++--------------------------------------------------------------------+
netperf.time.involuntary_context_switches
90000 ++------------------------------------------------------------------+
| O O O O O |
80000 ++ 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
O O O |
70000 ++ |
| |
60000 ++ |
| |
50000 ++ |
| .*. .*. .*. .*. .*. |
*.*.* *.*.*.*.* * *.*.* * *.*.*.*.*.*.*.* *.*.*.*.|
40000 ++ + + *
| *.*.*.* |
30000 ++------------------------------------------------------------------+
vmstat.system.cs
4500 ++-------------------------------------------------------------------+
| |
4000 ++ 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 O O O O O |
3500 ++ O O O
| |
3000 ++ |
| |
2500 ++ |
| .*. .*.*. |
*.*.* *.*.*.*.*.* *.*.*.*.*.. .*.*.*.*.*.*.*.*.*.*.*.*.*.*
2000 ++ *.*.*.* |
| |
1500 ++-------------------------------------------------------------------+
[*] 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-4.10.0-rc8-01900-gcd2b708" of type "text/plain" (157008 bytes)
View attachment "job-script" of type "text/plain" (6682 bytes)
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