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Date: Fri, 7 Nov 2014 14:00:40 +0800
From: LKP <lkp@...org>
To: Andy Lutomirski <luto@...capital.net>
Cc: LKML <linux-kernel@...r.kernel.org>, lkp@...org,
Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Subject: [LKP] [x86_64,entry] f04e05b81e4: -62.7% time.user_time
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/entry
commit f04e05b81e4d9ae88bee379f12176f551a24394a ("x86_64,entry: Use sysret to return to userspace when possible")
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12 testbox/testcase/testparams
---------------- --------------------------
%stddev %change %stddev
\ | \
24.09 ± 4% -62.7% 8.99 ± 3% lkp-wsx02/aim9/performance-300s-creat-clo
24.09 -62.7% 8.99 GEO-MEAN time.user_time
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
1571 ± 1% -13.5% 1359 ± 0% lkp-wsx02/aim9/performance-300s-creat-clo
1571 -13.5% 1359 GEO-MEAN vmstat.system.cs
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
276 ± 0% +5.5% 291 ± 0% lkp-wsx02/aim9/performance-300s-creat-clo
276 +5.5% 291 GEO-MEAN time.system_time
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- -------------------------- ---------------------------
430 ± 36% -36.0% 275 ± 39% lkp-wsx02/aim9/performance-300s-creat-clo
430 -36.0% 275 GEO-MEAN sched_debug.cpu#38.ttwu_count
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
52761811 ± 29% -54.7% 23885493 ± 11% lkp-wsx02/aim9/performance-300s-creat-clo
52761811 -54.7% 23885493 GEO-MEAN cpuidle.C1E-NHM.time
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
21939 ± 8% +42.6% 31283 ± 23% lkp-wsx02/aim9/performance-300s-creat-clo
21939 +42.6% 31283 GEO-MEAN numa-meminfo.node1.SUnreclaim
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
5484 ± 8% +40.3% 7694 ± 22% lkp-wsx02/aim9/performance-300s-creat-clo
5484 +40.3% 7694 GEO-MEAN numa-vmstat.node1.nr_slab_unreclaimable
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
34004 ± 2% +69.9% 57781 ± 4% lkp-wsx02/aim9/performance-300s-creat-clo
34004 +69.9% 57781 GEO-MEAN slabinfo.kmalloc-256.active_objs
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
1075 ± 2% +68.8% 1815 ± 4% lkp-wsx02/aim9/performance-300s-creat-clo
1074 +68.8% 1814 GEO-MEAN slabinfo.kmalloc-256.active_slabs
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
1075 ± 2% +68.8% 1815 ± 4% lkp-wsx02/aim9/performance-300s-creat-clo
1074 +68.8% 1814 GEO-MEAN slabinfo.kmalloc-256.num_slabs
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
34415 ± 2% +68.8% 58099 ± 4% lkp-wsx02/aim9/performance-300s-creat-clo
34415 +68.8% 58099 GEO-MEAN slabinfo.kmalloc-256.num_objs
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
32500 ± 7% +31.0% 42586 ± 17% lkp-wsx02/aim9/performance-300s-creat-clo
32500 +31.0% 42586 GEO-MEAN numa-meminfo.node1.Slab
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
73657 ± 1% -23.4% 56388 ± 3% lkp-wsx02/aim9/performance-300s-creat-clo
73657 -23.4% 56388 GEO-MEAN softirqs.RCU
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
10427 ± 14% -16.8% 8675 ± 6% lkp-wsx02/aim9/performance-300s-creat-clo
10427 -16.8% 8675 GEO-MEAN sched_debug.cfs_rq[0]:/.exec_clock
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
24242 ± 8% +18.4% 28696 ± 12% lkp-wsx02/aim9/performance-300s-creat-clo
24242 +18.4% 28696 GEO-MEAN numa-meminfo.node3.Active
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
2076 ± 7% +12.1% 2328 ± 2% lkp-wsx02/aim9/performance-300s-creat-clo
2076 +12.1% 2327 GEO-MEAN numa-meminfo.node2.KernelStack
f2ee9bebb99dd4a4 f04e05b81e4d9ae88bee379f12
---------------- --------------------------
1139198 ± 5% -6.6% 1063912 ± 0% lkp-wsx02/aim9/performance-300s-creat-clo
1139198 -6.6% 1063912 GEO-MEAN proc-vmstat.pgfault
lkp-wsx02: Westmere-EX
Memory: 128G
time.user_time
26 ++-----------------*----------------*--------*-------------------------+
| .*..*... .*..*. *..*..*.. .. .*. .*..*.. .*..*..|
24 *+ *. * *. *...*. .. *
22 ++ * |
| |
20 ++ |
18 ++ |
| |
16 ++ |
14 ++ |
| |
12 ++ |
10 ++ |
O O O O O O O O O O |
8 ++-O------O--O---------O--------O---O--O--O--O------------O------------+
time.system_time
294 ++--------------------------------------------------------------------+
292 ++ O O O O O O O |
O O O O O O O O O O O O O |
290 ++ |
288 ++ |
| |
286 ++ |
284 ++ |
282 ++ |
| |
280 ++ |
278 ++ *.. |
*.. ..*.. .*.. *.. .*..*.. .. . .*
276 ++ *..*. *..*..*..*..*...*. .. *...*. *..* *..*. |
274 ++---------------------------------*----------------------------------+
softirqs.RCU
80000 ++------------------------------------------------------------------+
| |
75000 ++ ..*..*..*.. .*.. .*.. *.. |
*..*..*..*.. .*. *..*.. .*..*. *.. .. .. *..*..*
| *. *. * * |
70000 ++ |
| |
65000 ++ |
| |
60000 ++ O |
| |
| O O O O O O O |
55000 O+ O O O O O O O O O O O |
| |
50000 ++------------------------------------------------------------------+
slabinfo.kmalloc-256.active_objs
70000 ++------------------------------------------------------------------+
| |
65000 ++ O O |
60000 ++ O O O O O O O O |
O O O O O O O O |
55000 ++ |
| O O |
50000 ++ |
| |
45000 ++ |
40000 ++ |
| .*.. |
35000 ++.*.. .*. *.. *..*.. .*.. .*..*... .*.. .*..*
*. *. . .. *..*..*. *..*. *. *..*. |
30000 ++-----------------*------------------------------------------------+
slabinfo.kmalloc-256.num_objs
70000 ++------------------------------------------------------------------+
| O |
65000 ++ O |
60000 ++ O O O O O O O O O |
O O O O O O O |
55000 ++ |
| O O |
50000 ++ |
| |
45000 ++ |
40000 ++ |
| .*.. |
35000 *+.*.. .*. *... .*..*.. .*.. .*..*...*..*..*.. .*..*
| *. *. *..*..*. *..*. *. |
30000 ++------------------------------------------------------------------+
slabinfo.kmalloc-256.active_slabs
2200 ++-------------------------------------------------------------------+
| O |
2000 ++ O O O |
| O O O O O O O O O |
1800 O+ O O O O |
| O |
1600 ++ O |
| |
1400 ++ |
| |
1200 ++ *...*.. |
*..*.. .. *.. .*..*.. .*...*..*.. .*..*..*..*...*.. .*..*
1000 ++ * *. *. *..*. *. |
| |
800 ++-------------------------------------------------------------------+
slabinfo.kmalloc-256.num_slabs
2200 ++-------------------------------------------------------------------+
| O |
2000 ++ O O O |
| O O O O O O O O O |
1800 O+ O O O O |
| O |
1600 ++ O |
| |
1400 ++ |
| |
1200 ++ *...*.. |
*..*.. .. *.. .*..*.. .*...*..*.. .*..*..*..*...*.. .*..*
1000 ++ * *. *. *..*. *. |
| |
800 ++-------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
apt-get install ruby ruby-oj
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.
View attachment "job.yaml" of type "text/plain" (1543 bytes)
View attachment "reproduce" of type "text/plain" (5910 bytes)
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