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Date: Thu, 18 Jun 2015 11:23:21 +0800
From: Huang Ying <ying.huang@...el.com>
To: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [drm/i915] 2def4ad99be: +182.8% piglit.time.system_time
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 2def4ad99befa25775dd2f714fdd4d92faec6e34 ("drm/i915: Optimistically spin for the request completion")
=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/group:
lkp-t410/piglit/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/performance/igt-052
commit:
a1b2278e4dfcd2dbea85e319ebf73a6b7b2f180b
2def4ad99befa25775dd2f714fdd4d92faec6e34
a1b2278e4dfcd2db 2def4ad99befa25775dd2f714f
---------------- --------------------------
%stddev %change %stddev
\ | \
6.00 ± 0% +116.7% 13.00 ± 0% piglit.time.percent_of_cpu_this_job_got
6.71 ± 0% +182.8% 18.96 ± 0% piglit.time.system_time
5598 ± 0% +2.1% 5718 ± 0% vmstat.system.in
6.00 ± 0% +116.7% 13.00 ± 0% time.percent_of_cpu_this_job_got
6.71 ± 0% +182.8% 18.96 ± 0% time.system_time
4.49 ± 0% -26.1% 3.32 ± 0% time.user_time
lkp-t410: Westmere
Memory: 2G
piglit.time.system_time
20 ++---------------------------------------------------------------------+
18 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 |
| |
16 ++ |
14 ++ |
| |
12 ++ |
10 ++ |
8 ++ |
* *..*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*
6 ++ : |
4 ++ : |
|: : |
2 ++: : |
0 ++*-*-*-*--------------------------------------------------------------+
piglit.time.percent_of_cpu_this_job_got
14 ++---------------------------------------------------------------------+
O O O O O O O O O O O O O O O O O O O O O O O O |
12 ++ O |
| |
10 ++ |
| |
8 ++ |
| |
6 *+ *..*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*
| : |
4 ++ : |
|: : |
2 ++ : |
| : : |
0 ++*-*-*-*--------------------------------------------------------------+
time.user_time
5 ++--------------------------------------------------------------------+
4.5 ++ .*..*. .*.. .*.*.*
* *.*.* *.*.*.*.*.*.*.*.*.*.*.*.*.*.* *.*.*.*.*.* |
4 ++ : |
3.5 ++ 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 |
3 ++ : |
2.5 ++ : |
2 ++ : |
|: : |
1.5 ++ : |
1 ++: : |
| : : |
0.5 ++: : |
0 ++*-*-*-*-------------------------------------------------------------+
time.system_time
20 ++---------------------------------------------------------------------+
18 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 |
| |
16 ++ |
14 ++ |
| |
12 ++ |
10 ++ |
8 ++ |
* *..*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*
6 ++ : |
4 ++ : |
|: : |
2 ++: : |
0 ++*-*-*-*--------------------------------------------------------------+
time.percent_of_cpu_this_job_got
14 ++---------------------------------------------------------------------+
O O O O O O O O O O O O O O O O O O O O O O O O |
12 ++ O |
| |
10 ++ |
| |
8 ++ |
| |
6 *+ *..*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*
| : |
4 ++ : |
|: : |
2 ++ : |
| : : |
0 ++*-*-*-*--------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
apt-get install ruby
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/setup-local job.yaml # the job file attached in this email
bin/run-local 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,
Ying Huang
-------------------------------------
lkp@...ists.intel.com
https://eclists.intel.com/sympa/info/lkp
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