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Date: Tue, 23 Dec 2014 13:15:54 +0800
From: Huang Ying <ying.huang@...el.com>
To: Kirill Tkhai <ktkhai@...allels.com>
Cc: Ingo Molnar <mingo@...nel.org>,
LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [sched] a15b12ac36a: -46.9% time.voluntary_context_switches
+1.5% will-it-scale.per_process_ops
FYI, we noticed the below changes on
commit a15b12ac36ad4e7b856a4ae54937ae26a51aebad ("sched: Do not stop cpu in set_cpus_allowed_ptr() if task is not running")
testbox/testcase/testparams: lkp-g5/will-it-scale/performance-lock1
1ba93d42727c4400 a15b12ac36ad4e7b856a4ae549
---------------- --------------------------
%stddev %change %stddev
\ | \
1517261 ± 0% +1.5% 1539994 ± 0% will-it-scale.per_process_ops
247 ± 30% +131.8% 573 ± 49% sched_debug.cpu#61.ttwu_count
225 ± 22% +142.8% 546 ± 34% sched_debug.cpu#81.ttwu_local
15115 ± 44% +37.3% 20746 ± 40% numa-meminfo.node7.Active
1028 ± 38% +115.3% 2214 ± 36% sched_debug.cpu#16.ttwu_local
2 ± 19% +133.3% 5 ± 43% sched_debug.cpu#89.cpu_load[3]
21 ± 45% +88.2% 40 ± 23% sched_debug.cfs_rq[99]:/.tg_load_contrib
414 ± 33% +98.6% 823 ± 28% sched_debug.cpu#81.ttwu_count
4 ± 10% +88.2% 8 ± 12% sched_debug.cfs_rq[33]:/.runnable_load_avg
22 ± 26% +80.9% 40 ± 24% sched_debug.cfs_rq[103]:/.tg_load_contrib
7 ± 17% -41.4% 4 ± 25% sched_debug.cfs_rq[41]:/.load
7 ± 17% -37.9% 4 ± 19% sched_debug.cpu#41.load
3 ± 22% +106.7% 7 ± 10% sched_debug.cfs_rq[36]:/.runnable_load_avg
174 ± 13% +48.7% 259 ± 31% sched_debug.cpu#112.ttwu_count
4 ± 19% +88.9% 8 ± 5% sched_debug.cfs_rq[35]:/.runnable_load_avg
260 ± 10% +55.6% 405 ± 26% numa-vmstat.node3.nr_anon_pages
1042 ± 10% +56.0% 1626 ± 26% numa-meminfo.node3.AnonPages
26 ± 22% +74.3% 45 ± 16% sched_debug.cfs_rq[65]:/.tg_load_contrib
21 ± 43% +71.3% 37 ± 26% sched_debug.cfs_rq[100]:/.tg_load_contrib
3686 ± 21% +40.2% 5167 ± 19% sched_debug.cpu#16.ttwu_count
142 ± 9% +34.4% 191 ± 24% sched_debug.cpu#112.ttwu_local
5 ± 18% +69.6% 9 ± 15% sched_debug.cfs_rq[35]:/.load
2 ± 30% +100.0% 5 ± 37% sched_debug.cpu#106.cpu_load[1]
3 ± 23% +100.0% 6 ± 48% sched_debug.cpu#106.cpu_load[2]
5 ± 18% +69.6% 9 ± 15% sched_debug.cpu#35.load
9 ± 20% +48.6% 13 ± 16% sched_debug.cfs_rq[7]:/.runnable_load_avg
1727 ± 15% +43.9% 2484 ± 30% sched_debug.cpu#34.ttwu_local
10 ± 17% -40.5% 6 ± 13% sched_debug.cpu#41.cpu_load[0]
10 ± 14% -29.3% 7 ± 5% sched_debug.cpu#45.cpu_load[4]
10 ± 17% -33.3% 7 ± 10% sched_debug.cpu#41.cpu_load[1]
6121 ± 8% +56.7% 9595 ± 30% sched_debug.cpu#13.sched_goidle
13 ± 8% -25.9% 10 ± 17% sched_debug.cpu#39.cpu_load[2]
12 ± 16% -24.0% 9 ± 15% sched_debug.cpu#37.cpu_load[2]
492 ± 17% -21.3% 387 ± 24% sched_debug.cpu#46.ttwu_count
3761 ± 11% -23.9% 2863 ± 15% sched_debug.cpu#93.curr->pid
570 ± 19% +43.2% 816 ± 17% sched_debug.cpu#86.ttwu_count
5279 ± 8% +63.5% 8631 ± 33% sched_debug.cpu#13.ttwu_count
377 ± 22% -28.6% 269 ± 14% sched_debug.cpu#46.ttwu_local
5396 ± 10% +29.9% 7007 ± 14% sched_debug.cpu#16.sched_goidle
1959 ± 12% +36.9% 2683 ± 15% numa-vmstat.node2.nr_slab_reclaimable
7839 ± 12% +37.0% 10736 ± 15% numa-meminfo.node2.SReclaimable
5 ± 15% +66.7% 8 ± 9% sched_debug.cfs_rq[33]:/.load
5 ± 25% +47.8% 8 ± 10% sched_debug.cfs_rq[37]:/.load
2 ± 0% +87.5% 3 ± 34% sched_debug.cpu#89.cpu_load[4]
5 ± 15% +66.7% 8 ± 9% sched_debug.cpu#33.load
6 ± 23% +41.7% 8 ± 10% sched_debug.cpu#37.load
8 ± 10% -26.5% 6 ± 6% sched_debug.cpu#51.cpu_load[1]
7300 ± 37% +63.6% 11943 ± 16% softirqs.TASKLET
2984 ± 6% +43.1% 4271 ± 23% sched_debug.cpu#20.ttwu_count
328 ± 4% +40.5% 462 ± 25% sched_debug.cpu#26.ttwu_local
10 ± 7% -27.5% 7 ± 5% sched_debug.cpu#43.cpu_load[3]
9 ± 8% -30.8% 6 ± 6% sched_debug.cpu#41.cpu_load[3]
9 ± 8% -27.0% 6 ± 6% sched_debug.cpu#41.cpu_load[4]
10 ± 14% -32.5% 6 ± 6% sched_debug.cpu#41.cpu_load[2]
16292 ± 6% +42.8% 23260 ± 25% sched_debug.cpu#13.nr_switches
14 ± 28% +55.9% 23 ± 8% sched_debug.cpu#99.cpu_load[0]
5 ± 8% +28.6% 6 ± 12% sched_debug.cpu#17.load
13 ± 7% -23.1% 10 ± 12% sched_debug.cpu#39.cpu_load[3]
7 ± 10% -35.7% 4 ± 11% sched_debug.cfs_rq[45]:/.runnable_load_avg
5076 ± 13% -21.8% 3970 ± 11% numa-vmstat.node0.nr_slab_unreclaimable
20306 ± 13% -21.8% 15886 ± 11% numa-meminfo.node0.SUnreclaim
10 ± 10% -28.6% 7 ± 6% sched_debug.cpu#45.cpu_load[3]
11 ± 11% -29.5% 7 ± 14% sched_debug.cpu#45.cpu_load[1]
10 ± 12% -26.8% 7 ± 6% sched_debug.cpu#44.cpu_load[1]
10 ± 10% -28.6% 7 ± 6% sched_debug.cpu#44.cpu_load[0]
7 ± 17% +48.3% 10 ± 7% sched_debug.cfs_rq[11]:/.runnable_load_avg
11 ± 12% -34.1% 7 ± 11% sched_debug.cpu#47.cpu_load[0]
10 ± 10% -27.9% 7 ± 5% sched_debug.cpu#47.cpu_load[1]
10 ± 8% -26.8% 7 ± 11% sched_debug.cpu#47.cpu_load[2]
10 ± 8% -28.6% 7 ± 14% sched_debug.cpu#43.cpu_load[0]
10 ± 10% -27.9% 7 ± 10% sched_debug.cpu#43.cpu_load[1]
10 ± 10% -28.6% 7 ± 6% sched_debug.cpu#43.cpu_load[2]
12940 ± 3% +49.8% 19387 ± 35% numa-meminfo.node2.Active(anon)
3235 ± 2% +49.8% 4844 ± 35% numa-vmstat.node2.nr_active_anon
17 ± 17% +36.6% 24 ± 9% sched_debug.cpu#97.cpu_load[2]
14725 ± 8% +21.8% 17928 ± 11% sched_debug.cpu#16.nr_switches
667 ± 10% +45.3% 969 ± 22% sched_debug.cpu#17.ttwu_local
3257 ± 5% +22.4% 3988 ± 11% sched_debug.cpu#118.curr->pid
3144 ± 15% -20.7% 2493 ± 8% sched_debug.cpu#95.curr->pid
2192 ± 11% +50.9% 3308 ± 37% sched_debug.cpu#18.ttwu_count
6 ± 11% +37.5% 8 ± 19% sched_debug.cfs_rq[22]:/.load
12 ± 5% +27.1% 15 ± 8% sched_debug.cpu#5.cpu_load[1]
11 ± 12% -23.4% 9 ± 13% sched_debug.cpu#37.cpu_load[3]
6 ± 11% +37.5% 8 ± 19% sched_debug.cpu#22.load
8 ± 8% -25.0% 6 ± 0% sched_debug.cpu#51.cpu_load[2]
7 ± 6% -20.0% 6 ± 11% sched_debug.cpu#55.cpu_load[3]
11 ± 9% -17.4% 9 ± 9% sched_debug.cpu#39.cpu_load[4]
12 ± 5% -22.9% 9 ± 11% sched_debug.cpu#38.cpu_load[3]
420 ± 13% +43.0% 601 ± 9% sched_debug.cpu#30.ttwu_local
1682 ± 14% +38.5% 2329 ± 17% numa-meminfo.node7.AnonPages
423 ± 13% +37.0% 579 ± 16% numa-vmstat.node7.nr_anon_pages
15 ± 13% +41.9% 22 ± 5% sched_debug.cpu#99.cpu_load[1]
6 ± 20% +44.0% 9 ± 13% sched_debug.cfs_rq[19]:/.runnable_load_avg
9 ± 4% -24.3% 7 ± 0% sched_debug.cpu#43.cpu_load[4]
6341 ± 7% -19.6% 5100 ± 16% sched_debug.cpu#43.curr->pid
2577 ± 11% -11.9% 2270 ± 10% sched_debug.cpu#33.ttwu_count
13 ± 6% -18.5% 11 ± 12% sched_debug.cpu#40.cpu_load[2]
4828 ± 6% +23.8% 5979 ± 6% sched_debug.cpu#34.curr->pid
4351 ± 12% +33.9% 5824 ± 12% sched_debug.cpu#36.curr->pid
10 ± 8% -23.8% 8 ± 8% sched_debug.cpu#37.cpu_load[4]
10 ± 14% -28.6% 7 ± 6% sched_debug.cpu#45.cpu_load[2]
17 ± 22% +40.6% 24 ± 7% sched_debug.cpu#97.cpu_load[1]
11 ± 9% +21.3% 14 ± 5% sched_debug.cpu#7.cpu_load[2]
10 ± 8% -26.2% 7 ± 10% sched_debug.cpu#36.cpu_load[4]
12853 ± 2% +20.0% 15429 ± 11% numa-meminfo.node2.AnonPages
4744 ± 8% +30.8% 6204 ± 11% sched_debug.cpu#35.curr->pid
3214 ± 2% +20.0% 3856 ± 11% numa-vmstat.node2.nr_anon_pages
6181 ± 6% +24.9% 7718 ± 9% sched_debug.cpu#13.curr->pid
6675 ± 23% +27.5% 8510 ± 10% sched_debug.cfs_rq[91]:/.tg_load_avg
171261 ± 5% -22.2% 133177 ± 15% numa-numastat.node0.local_node
6589 ± 21% +29.3% 8522 ± 11% sched_debug.cfs_rq[89]:/.tg_load_avg
6508 ± 20% +28.0% 8331 ± 8% sched_debug.cfs_rq[88]:/.tg_load_avg
6598 ± 22% +29.2% 8525 ± 11% sched_debug.cfs_rq[90]:/.tg_load_avg
590 ± 13% -21.4% 464 ± 7% sched_debug.cpu#105.ttwu_local
175392 ± 5% -21.7% 137308 ± 14% numa-numastat.node0.numa_hit
11 ± 6% -18.2% 9 ± 7% sched_debug.cpu#38.cpu_load[4]
6643 ± 23% +27.4% 8465 ± 10% sched_debug.cfs_rq[94]:/.tg_load_avg
6764 ± 7% +13.8% 7695 ± 7% sched_debug.cpu#12.curr->pid
29 ± 28% +34.5% 39 ± 5% sched_debug.cfs_rq[98]:/.tg_load_contrib
1776 ± 7% +29.4% 2298 ± 13% sched_debug.cpu#11.ttwu_local
13 ± 0% -19.2% 10 ± 8% sched_debug.cpu#40.cpu_load[3]
7 ± 5% -17.2% 6 ± 0% sched_debug.cpu#51.cpu_load[3]
7371 ± 20% -18.0% 6045 ± 3% sched_debug.cpu#1.sched_goidle
26560 ± 2% +14.0% 30287 ± 7% numa-meminfo.node2.Slab
16161 ± 6% -9.4% 14646 ± 1% sched_debug.cfs_rq[27]:/.avg->runnable_avg_sum
351 ± 6% -9.3% 318 ± 1% sched_debug.cfs_rq[27]:/.tg_runnable_contrib
7753 ± 27% -22.9% 5976 ± 5% sched_debug.cpu#2.sched_goidle
3828 ± 9% +17.3% 4490 ± 6% sched_debug.cpu#23.sched_goidle
23925 ± 2% +23.0% 29419 ± 23% numa-meminfo.node2.Active
47 ± 6% -15.8% 40 ± 19% sched_debug.cpu#42.cpu_load[1]
282 ± 5% -9.7% 254 ± 7% sched_debug.cfs_rq[109]:/.tg_runnable_contrib
349 ± 5% -9.3% 317 ± 1% sched_debug.cfs_rq[26]:/.tg_runnable_contrib
6941 ± 3% +8.9% 7558 ± 7% sched_debug.cpu#61.nr_switches
16051 ± 5% -8.9% 14618 ± 1% sched_debug.cfs_rq[26]:/.avg->runnable_avg_sum
238944 ± 3% +9.2% 260958 ± 5% numa-vmstat.node2.numa_local
12966 ± 5% -9.5% 11732 ± 6% sched_debug.cfs_rq[109]:/.avg->runnable_avg_sum
1004 ± 3% +8.2% 1086 ± 4% sched_debug.cpu#118.sched_goidle
20746 ± 4% -8.4% 19000 ± 1% sched_debug.cfs_rq[45]:/.avg->runnable_avg_sum
451 ± 4% -8.3% 413 ± 1% sched_debug.cfs_rq[45]:/.tg_runnable_contrib
3538 ± 4% +17.2% 4147 ± 8% sched_debug.cpu#26.ttwu_count
16 ± 9% +13.8% 18 ± 2% sched_debug.cpu#99.cpu_load[3]
1531 ± 0% +11.3% 1704 ± 1% numa-meminfo.node7.KernelStack
3569 ± 3% +17.2% 4182 ± 10% sched_debug.cpu#24.sched_goidle
1820 ± 3% -12.5% 1594 ± 8% slabinfo.taskstats.num_objs
1819 ± 3% -12.4% 1594 ± 8% slabinfo.taskstats.active_objs
4006 ± 5% +19.1% 4769 ± 8% sched_debug.cpu#17.sched_goidle
21412 ± 19% -17.0% 17779 ± 3% sched_debug.cpu#2.nr_switches
16 ± 9% +24.2% 20 ± 4% sched_debug.cpu#99.cpu_load[2]
10493 ± 7% +13.3% 11890 ± 4% sched_debug.cpu#23.nr_switches
1207 ± 2% -46.9% 640 ± 4% time.voluntary_context_switches
time.voluntary_context_switches
1300 ++-----------*--*--------------------*-------------------------------+
*..*.*..*.. + *.*..*..*.*..*..* .*..*..*. .*..*.*..*.. |
1200 ++ * * *. *.*..*
1100 ++ |
| |
1000 ++ |
| |
900 ++ |
| |
800 ++ |
700 ++ |
O O O O O O O O O O O O O |
600 ++ O O O O O O O O O |
| O |
500 ++-------------------------------------------------------------------+
[*] 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.
Thanks,
Huang, Ying
View attachment "job.yaml" of type "text/plain" (1495 bytes)
View attachment "reproduce" of type "text/plain" (9543 bytes)
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