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Date: Wed, 18 Mar 2015 16:08:28 +0800
From: Huang Ying <ying.huang@...el.com>
To: Amir Vadai <amirv@...lanox.com>
Cc: LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [regression] d7aa432ad5f: -5.6% will-it-scale.per_thread_ops
FYI, we noticed the below changes on
git://flatbed.openfabrics.org/~amirv/linux.git for-upstream
commit d7aa432ad5fa589c56a11bd7993cff05e9b87d05 ("regression: Disable FENTRY [topic: regression] [net-next:regression]")
testbox/testcase/testparams: lkp-sb03/will-it-scale/poll2
5cd08c4aa1751f04 d7aa432ad5fa589c56a11bd799
---------------- --------------------------
%stddev %change %stddev
\ | \
650868 ± 0% -2.9% 631737 ± 0% will-it-scale.per_process_ops
281122 ± 0% -5.6% 265461 ± 0% will-it-scale.per_thread_ops
153 ± 0% -7.9% 141 ± 0% will-it-scale.time.user_time
118 ± 0% +0.9% 119 ± 0% turbostat.CorWatt
2733 ± 3% +12.2% 3066 ± 2% proc-vmstat.nr_alloc_batch
1319 ± 3% +19.1% 1570 ± 5% numa-vmstat.node0.nr_alloc_batch
2250 ± 6% -13.0% 1958 ± 5% slabinfo.kmalloc-2048.active_objs
2380 ± 6% -13.2% 2066 ± 5% slabinfo.kmalloc-2048.num_objs
31.65 ± 0% -92.2% 2.46 ± 7% perf-profile.cpu-cycles.fput.sys_poll.system_call_fastpath
60.25 ± 0% +46.7% 88.37 ± 5% perf-profile.cpu-cycles.do_sys_poll.sys_poll.system_call_fastpath
3.57 ± 7% -10.2% 3.21 ± 3% perf-profile.cpu-cycles.copy_user_generic_string.sys_poll.system_call_fastpath
2.66 ± 2% -100.0% 0.00 ± 0% perf-profile.cpu-cycles.__fdget.sys_poll.system_call_fastpath
2.71 ± 0% -100.0% 0.00 ± 0% perf-profile.cpu-cycles.__fget_light.do_sys_poll.sys_poll.system_call_fastpath
0.00 ± 0% +Inf% 33.68 ± 8% perf-profile.cpu-cycles.fput.do_sys_poll.sys_poll.system_call_fastpath
25 ± 37% -33.0% 16 ± 4% sched_debug.cfs_rq[15]:/.runnable_load_avg
37159 ± 9% +20.7% 44850 ± 16% sched_debug.cfs_rq[24]:/.exec_clock
830542 ± 10% +18.8% 986752 ± 15% sched_debug.cfs_rq[24]:/.min_vruntime
18120 ± 8% -17.8% 14897 ± 19% sched_debug.cfs_rq[8]:/.avg->runnable_avg_sum
394 ± 8% -17.8% 323 ± 19% sched_debug.cfs_rq[8]:/.tg_runnable_contrib
26 ± 43% -36.2% 16 ± 4% sched_debug.cpu#15.cpu_load[1]
23 ± 30% -28.3% 16 ± 5% sched_debug.cpu#15.cpu_load[2]
1564 ± 21% +73.2% 2709 ± 47% sched_debug.cpu#20.nr_switches
617 ± 27% +99.6% 1232 ± 48% sched_debug.cpu#20.ttwu_count
2164 ± 20% -28.2% 1553 ± 35% sched_debug.cpu#25.ttwu_count
1902 ± 21% -26.6% 1397 ± 36% sched_debug.cpu#25.sched_goidle
1947 ± 35% -62.6% 728 ± 35% sched_debug.cpu#26.ttwu_local
5620 ± 23% -41.6% 3282 ± 15% sched_debug.cpu#26.nr_switches
2595 ± 26% -43.5% 1465 ± 19% sched_debug.cpu#26.ttwu_count
653 ± 9% +76.3% 1151 ± 34% sched_debug.cpu#31.ttwu_local
1162 ± 10% +34.5% 1563 ± 22% sched_debug.cpu#31.sched_goidle
2885 ± 9% +34.5% 3880 ± 22% sched_debug.cpu#31.nr_switches
lkp-sb03: Sandy Bridge-EP
Memory: 64G
perf-profile.cpu-cycles.do_sys_poll.sys_poll.system_call_fastpath
95 ++---------------------------------------------------------------------+
| O O O O O O O O O O O O O O O O O O O O |
90 ++ O O O |
85 ++ |
O |
80 ++ O
| |
75 ++ |
| |
70 ++ |
65 ++ |
| |
60 *+.*..*..*..*.. .*..*..*..*..*..*..*.*..*..*..*..*..*..*..* |
| *. |
55 ++---------------------------------------------------------------------+
perf-profile.cpu-cycles.fput.do_sys_poll.sys_poll.system_call_fastpath
37 ++---------------------------------------------------------------------+
| O |
36 ++ O O |
35 ++ O O O O O O O O O O O O O O |
| O O O |
34 ++ O O |
33 ++ O |
| |
32 ++ |
31 ++ |
| |
30 O+ |
29 ++ |
| O
28 ++---------------------------------------------------------------------+
perf-profile.cpu-cycles.fput.sys_poll.system_call_fastpath
35 ++---------------------------------------------------------------------+
*..*..*..*..*.. .*..*..*..*..*..*..*.*..*..*..*..*..*..*..* |
30 ++ *. |
| |
25 ++ |
| |
20 ++ |
| |
15 ++ |
| |
10 ++ |
| |
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
0 ++---------------------------------------------------------------------+
will-it-scale.per_thread_ops
290000 ++-----------------------------------------------------------------+
| |
285000 ++ *..*.. |
| : |
*..*..*.*..*.. .*..* : * *..*..*..*.*.. .*..* |
280000 ++ *. + : + : *. |
| * + : |
275000 ++ * |
| |
270000 ++ |
| |
| O O O O O O O O |
265000 ++ O O O O O O O O O O O O |
O O O O
260000 ++---------------O-------------------------------------------------+
perf-profile.cpu-cycles.__fget_light.do_sys_poll.sys_poll.system_call_fastpath
3 ++--------------------------------------------------------------------+
*.. .*..*..*..*.. .*..*..*..*.. .*..*..*.. .*..*..*.*..* |
2.5 ++ *. * *. *. |
| |
| |
2 ++ |
| |
1.5 ++ |
| |
1 ++ |
| |
| |
0.5 ++ |
| |
0 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
perf-profile.cpu-cycles.__fdget.sys_poll.system_call_fastpath
3 ++--------------------------------------------------------------------+
*..*..*..*..*..*..*.*..*..*..*..*..*.. .*.. .* |
2.5 ++ *..*..*..*. *.*. |
| |
| |
2 ++ |
| |
1.5 ++ |
| |
1 ++ |
| |
| |
0.5 ++ |
| |
0 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
[*] 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
View attachment "job.yaml" of type "text/plain" (1710 bytes)
View attachment "reproduce" of type "text/plain" (40 bytes)
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