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Date: Wed, 18 Jun 2014 11:15:44 +0800
From: Jet Chen <jet.chen@...el.com>
To: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
CC: Fengguang Wu <fengguang.wu@...el.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org,
Steven Rostedt <rostedt@...dmis.org>
Subject: [tracing] 939c7a4f04f: -46.4% cpuidle.C3-IVT.time
Hi Yoshihiro,
FYI, we noticed the below changes on
commit 939c7a4f04fcd2162109744e8bf88194948a6e65 ("tracing: Introduce saved_cmdlines_size file")
test case: brickland3/aim7/3000-brk_test
beba4bb096201ce 939c7a4f04fcd2162109744e8
--------------- -------------------------
352643 ~40% -46.4% 189136 ~15% TOTAL cpuidle.C3-IVT.time
750 ~ 2% -13.3% 650 ~ 2% TOTAL vmstat.procs.b
362016 ~ 3% -6.0% 340296 ~ 3% TOTAL proc-vmstat.pgmigrate_success
362016 ~ 3% -6.0% 340296 ~ 3% TOTAL proc-vmstat.numa_pages_migrated
1642328 ~ 3% +13.3% 1860721 ~ 2% TOTAL softirqs.RCU
2278829 ~ 2% -14.0% 1959647 ~ 2% TOTAL time.voluntary_context_switches
207 ~ 0% -10.4% 185 ~ 0% TOTAL time.user_time
~ 0% +8.5% ~ 0% TOTAL turbostat.RAM_W
4418246 ~ 3% -6.4% 4136447 ~ 1% TOTAL time.minor_page_faults
~ 0% +3.4% ~ 0% TOTAL turbostat.Cor_W
~ 0% +3.0% ~ 0% TOTAL turbostat.Pkg_W
11354889 ~ 0% +2.0% 11579897 ~ 0% TOTAL time.involuntary_context_switches
Legend:
~XX% - stddev percent
[+-]XX% - change percent
time.voluntary_context_switches
2.4e+06 ++---------------------------------------------------*------------+
*.. *.. .. .. |
2.3e+06 ++ .*.. *.. .. * |
| *..*. . .*.. .. * *.. + *.. *..*
| *. * . .*..*.. + .. |
2.2e+06 ++ *..*. * * |
| |
2.1e+06 ++ |
| |
2e+06 O+ O O O |
| O O O O |
| O O O O O |
1.9e+06 ++ O O O O |
| O O O |
1.8e+06 ++----------------------------------------------------------------+
turbostat.Pkg_W
++--------------------------------------------------------------------+
O+ O O O O O |
| O O O O O O O O O O O O |
++ O O |
++ |
++ |
++ |
| |
++ |
++ |
++ *.. .*.. |
*+.*... .. *...*. *...*..*..*...*..*.. ..*.. *...*..*..*...*..*
| * *. .. |
++ * |
++--------------------------------------------------------------------+
turbostat.Cor_W
++--------------------------------------------------------------------+
O+ O O O O O O O O O |
| O O O O O O O O O O |
++ |
++ |
| |
++ |
++ |
++ |
| |
++ *.. |
*+.*... .. *...*..*..*...*..*..*...*..*.. ..*.. *... .*..*...*..*
| * *. .. *. |
++ * |
++--------------------------------------------------------------------+
turbostat.RAM_W
++---------------------------------------------------------------------+
| O O O O O O O O |
O+ O O O O O O O O O O |
| O |
++ |
| |
++ |
| |
++ |
| * |
++ .. + *.. |
| .*..* + *.. *.. + ..*..*.. .*... |
++ .. + .. .. . + *. *...*. *..*
*..*...*..* * *...* * |
++---------------------------------------------------------------------+
[*] 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,
Jet
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