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Date: Mon, 14 Mar 2016 10:14:37 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc: Jani Nikula <jani.nikula@...el.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [drm/i915] 0bbca274a3: 3.6% piglit.time.elapsed_time
FYI, we noticed that piglit.time.elapsed_time 3.6% regression on
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 0bbca274a31c2366414d8d3f95e03d1c4674d93f ("drm/i915: Actually retry with bit-banging after GMBUS timeout")
=========================================================================================
compiler/group/kconfig/rootfs/tbox_group/testcase:
gcc-4.9/igt-039/x86_64-rhel/debian-x86_64-2015-02-07.cgz/snb-black/piglit
commit:
2f791908a70e95768596f5bb9e6de4f441d7bf13
0bbca274a31c2366414d8d3f95e03d1c4674d93f
2f791908a70e9576 0bbca274a31c2366414d8d3f95
---------------- --------------------------
%stddev %change %stddev
\ | \
188.79 ± 0% +3.6% 195.58 ± 0% piglit.time.elapsed_time
188.79 ± 0% +3.6% 195.58 ± 0% piglit.time.elapsed_time.max
5.00 ± 0% +60.0% 8.00 ± 0% piglit.time.percent_of_cpu_this_job_got
7.86 ± 0% +83.5% 14.42 ± 0% piglit.time.system_time
5.00 ± 0% +60.0% 8.00 ± 0% time.percent_of_cpu_this_job_got
7.86 ± 0% +83.5% 14.42 ± 0% time.system_time
=========================================================================================
compiler/group/kconfig/rootfs/tbox_group/testcase:
gcc-4.9/igt-036/x86_64-rhel/debian-x86_64-2015-02-07.cgz/lkp-u410/piglit
commit:
2f791908a70e95768596f5bb9e6de4f441d7bf13
0bbca274a31c2366414d8d3f95e03d1c4674d93f
2f791908a70e9576 0bbca274a31c2366414d8d3f95
---------------- --------------------------
%stddev %change %stddev
\ | \
141.15 ± 0% +6.9% 150.94 ± 0% piglit.time.elapsed_time
141.15 ± 0% +6.9% 150.94 ± 0% piglit.time.elapsed_time.max
10.00 ± 0% +60.0% 16.00 ± 0% piglit.time.percent_of_cpu_this_job_got
10.61 ± 0% +88.8% 20.04 ± 0% piglit.time.system_time
10.00 ± 0% +60.0% 16.00 ± 0% time.percent_of_cpu_this_job_got
10.61 ± 0% +88.8% 20.04 ± 0% time.system_time
snb-black: Sandy Bridge
Memory: 8G
lkp-u410: Ivy Bridge
Memory: 4G
piglit.time.system_time
21 ++---------------------------------------------------------------------+
20 O+ O O O O O O O O O O O O O O O O O O O O O O |
| |
19 ++ |
18 ++ |
17 ++ |
16 ++ |
| |
15 ++ |
14 ++ |
13 ++ |
12 ++ |
| |
11 *+.*..*..*..*..*..*..*..*..*..*..*..*.*..*..*..*..*..*..*..*..*..*..*..*
10 ++---------------------------------------------------------------------+
piglit.time.percent_of_cpu_this_job_got
16 O+-O--O--O--O--O--O--O--O--O--O--O--O-O--O--O--O--O--O--O--O--O--O-----+
| |
15 ++ |
| |
| |
14 ++ |
| |
13 ++ |
| |
12 ++ |
| |
| |
11 *+. *.. *.. *.. |
| .. .. .. |
10 ++-*--*--*--*--*--*-----*--*--*-----*-*--*--*-----*--*--*--*--*--*--*--*
piglit.time.elapsed_time
152 ++--------------------------------------------------------------------+
| O O O O O O O O O O O O O O O O O O O O O O |
150 O+ |
| |
| |
148 ++ |
| |
146 ++ |
| |
144 ++ |
| |
| |
142 ++ .*.. |
*.. .*..*..*..* *..*..*..*.. .*..*..*.. .*..*..*..*..*..*
140 ++-*--*----------------------------*--*-----------*--*----------------+
piglit.time.elapsed_time.max
152 ++--------------------------------------------------------------------+
| O O O O O O O O O O O O O O O O O O O O O O |
150 O+ |
| |
| |
148 ++ |
| |
146 ++ |
| |
144 ++ |
| |
| |
142 ++ .*.. |
*.. .*..*..*..* *..*..*..*.. .*..*..*.. .*..*..*..*..*..*
140 ++-*--*----------------------------*--*-----------*--*----------------+
time.system_time
21 ++---------------------------------------------------------------------+
20 O+ O O O O O O O O O O O O O O O O O O O O O O |
| |
19 ++ |
18 ++ |
17 ++ |
16 ++ |
| |
15 ++ |
14 ++ |
13 ++ |
12 ++ |
| |
11 *+.*..*..*..*..*..*..*..*..*..*..*..*.*..*..*..*..*..*..*..*..*..*..*..*
10 ++---------------------------------------------------------------------+
time.percent_of_cpu_this_job_got
16 O+-O--O--O--O--O--O--O--O--O--O--O--O-O--O--O--O--O--O--O--O--O--O-----+
| |
15 ++ |
| |
| |
14 ++ |
| |
13 ++ |
| |
12 ++ |
| |
| |
11 *+. *.. *.. *.. |
| .. .. .. |
10 ++-*--*--*--*--*--*-----*--*--*-----*-*--*--*-----*--*--*--*--*--*--*--*
piglit.time.system_time
15 ++---------------------------------------------------------------------+
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 |
14 ++ |
13 ++ |
| |
12 ++ |
| |
11 ++ |
| |
10 ++ |
9 ++ |
| |
8 ++ .*..*.. .*.. .*..*. .*..*.*..*.. .*
*..*..*..* *..*. *.*..*..*..*. *..*..*..*. *. |
7 ++---------------------------------------------------------------------+
piglit.time.elapsed_time
450 ++--------------------------------------------------------------------+
| |
400 ++ O |
| |
| |
350 ++ |
| |
300 ++ |
| |
250 ++ |
| |
| |
200 O+.O..O.O..O..O..O..O.O..O..O..O..O.O..*..O..O..O.O..O..O..O..O.O..O..*
| |
150 ++--------------------------------------------------------------------+
piglit.time.elapsed_time.max
450 ++--------------------------------------------------------------------+
| |
400 ++ O |
| |
| |
350 ++ |
| |
300 ++ |
| |
250 ++ |
| |
| |
200 O+.O..O.O..O..O..O..O.O..O..O..O..O.O..*..O..O..O.O..O..O..O..O.O..O..*
| |
150 ++--------------------------------------------------------------------+
time.system_time
15 ++---------------------------------------------------------------------+
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 |
14 ++ |
13 ++ |
| |
12 ++ |
| |
11 ++ |
| |
10 ++ |
9 ++ |
| |
8 ++ .*..*.. .*.. .*..*. .*..*.*..*.. .*
*..*..*..* *..*. *.*..*..*..*. *..*..*..*. *. |
7 ++---------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run 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,
Xiaolong Ye
View attachment "job.yaml" of type "text/plain" (2868 bytes)
View attachment "reproduce" of type "text/plain" (180 bytes)
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