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Date: Mon, 27 Oct 2014 10:14:25 +0800
From: kernel test robot <fengguang.wu@...el.com>
To: Jason Low <jason.low2@...com>
Cc: Ingo Molnar <mingo@...nel.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org,
Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Subject: [LKP] [sched] 8236d907ab3: 2% vm-scalability.throughput
FYI, we noticed the below changes on
commit 8236d907ab3411ad452280faa8b26c1347327380 ("sched: Reduce contention in update_cfs_rq_blocked_load()")
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8 testbox/testcase/testparams
---------------- -------------------------- ---------------------------
%stddev %change %stddev
\ | \
8957484 ± 0% +1.9% 9123335 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
8977343 ± 0% +2.0% 9152823 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
8967408 +1.9% 9138067 GEO-MEAN vm-scalability.throughput
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
4.05 ± 5% -99.0% 0.04 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
3.95 ± 4% -98.9% 0.04 ± 9% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
4.00 -99.0% 0.04 GEO-MEAN perf-profile.cpu-cycles.task_tick_fair.scheduler_tick.update_process_times.tick_sched_handle.tick_sched_timer
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
3.88 ± 4% -99.5% 0.02 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
3.83 ± 2% -99.5% 0.02 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
3.85 -99.5% 0.02 GEO-MEAN perf-profile.cpu-cycles.update_cfs_rq_blocked_load.task_tick_fair.scheduler_tick.update_process_times.tick_sched_handle
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
61 ± 43% -70.8% 18 ± 24% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
61 -70.8% 17 GEO-MEAN sched_debug.cfs_rq[50]:/.tg_load_contrib
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
7257 ± 37% +106.2% 14962 ± 49% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
7257 +106.2% 14962 GEO-MEAN sched_debug.cpu#1.sched_count
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
0.06 ± 15% +96.8% 0.12 ± 18% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
0.06 +96.8% 0.12 GEO-MEAN turbostat.%c1
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
415 ± 14% -24.7% 313 ± 33% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
415 -24.7% 312 GEO-MEAN slabinfo.blkdev_queue.num_objs
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
2080 ± 21% +78.4% 3711 ± 44% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
2080 +78.4% 3711 GEO-MEAN sched_debug.cpu#33.ttwu_count
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
58 ± 39% +93.1% 112 ± 34% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
58 +93.1% 112 GEO-MEAN sched_debug.cfs_rq[11]:/.tg_load_contrib
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
5708 ± 13% -14.8% 4862 ± 19% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
5708 -14.8% 4862 GEO-MEAN meminfo.AnonHugePages
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
487 ± 9% +42.3% 693 ± 14% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
487 +42.3% 693 GEO-MEAN sched_debug.cpu#20.sched_goidle
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
15 ± 10% +37.3% 20 ± 12% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
15 +37.3% 20 GEO-MEAN sched_debug.cpu#26.load
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
18 ± 7% -19.4% 15 ± 5% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
18 -19.4% 15 GEO-MEAN sched_debug.cpu#49.cpu_load[3]
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
231 ± 14% -25.0% 173 ± 20% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
231 -25.0% 173 GEO-MEAN sched_debug.cpu#58.sched_goidle
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
1441314 ± 3% +26.9% 1829712 ± 2% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
1414086 ± 8% +23.6% 1747307 ± 8% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
1427635 +25.2% 1788034 GEO-MEAN softirqs.RCU
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
17 ± 6% -16.9% 14 ± 5% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
17 -16.9% 14 GEO-MEAN sched_debug.cpu#49.cpu_load[4]
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
19 ± 9% -16.8% 15 ± 7% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
18 -16.8% 15 GEO-MEAN sched_debug.cpu#49.cpu_load[2]
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
1196 ± 8% +17.3% 1403 ± 5% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
1196 +17.3% 1403 GEO-MEAN sched_debug.cpu#49.sched_goidle
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
98963 ± 0% +52.9% 151281 ± 38% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
98963 +52.9% 151281 GEO-MEAN numa-meminfo.node3.FilePages
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
24740 ± 0% +52.9% 37819 ± 38% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
24740 +52.9% 37819 GEO-MEAN numa-vmstat.node3.nr_file_pages
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
38000 ± 1% +15.9% 44042 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
38312 ± 2% +13.9% 43643 ± 1% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
38156 +14.9% 43842 GEO-MEAN proc-vmstat.pgactivate
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
3.29 ± 6% +15.3% 3.80 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
3.33 ± 2% +14.0% 3.79 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
3.31 +14.7% 3.79 GEO-MEAN perf-profile.cpu-cycles.__drand48_iterate
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
3.34 ± 6% +14.9% 3.83 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
3.37 ± 2% +13.8% 3.84 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
3.35 +14.3% 3.83 GEO-MEAN perf-profile.cpu-cycles.__nrand48_r
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
81.57 ± 0% +10.8% 90.40 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
81.61 ± 0% +10.8% 90.40 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
81.59 +10.8% 90.40 GEO-MEAN perf-profile.cpu-cycles.do_unit
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
39878 ± 0% -9.5% 36107 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
39774 ± 0% -9.3% 36061 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
39826 -9.4% 36084 GEO-MEAN proc-vmstat.nr_shmem
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
159494 ± 0% -9.5% 144409 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
159156 ± 0% -9.3% 144313 ± 0% lkp-nex06/vm-scalability/performance-300s-anon-r-rand
159325 -9.4% 144361 GEO-MEAN meminfo.Shmem
5cd038f53ed9ec7a 8236d907ab3411ad452280faa8
---------------- --------------------------
144353 ± 2% -3.7% 138984 ± 2% lkp-nex06/vm-scalability/performance-300s-anon-r-rand-mt
144353 -3.7% 138984 GEO-MEAN time.involuntary_context_switches
lkp-nex06: Nehalem-EX
Memory: 64G
vm-scalability.throughput
9.15e+06 ++---------------------------------------------------------------+
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 O O
9.1e+06 ++ |
| |
| |
9.05e+06 ++ |
| |
9e+06 ++ *.. |
| : .*.*..*. .*.*.. |
| .* .*.. : *.*. *. .* *. .* |
8.95e+06 *+ + .* * *.*. : + *. |
| *. : + |
| * |
8.9e+06 ++---------------------------------------------------------------+
perf-profile.cpu-cycles.do_unit
91 ++---------------------------------------------------------------------+
90 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 O O
| |
89 ++ |
88 ++ |
| |
87 ++ |
86 ++ |
85 ++ |
| |
84 ++ |
83 ++ .*.. .*.. |
| .* *. *.*..*..*..*. |
82 *+.*.*.. .*. *.. .*. .*.. .*.* |
81 ++------*--------------------------------*----*-----*------------------+
4.5 ++--------------------------------------------------------------------+
| *.. .*..*..*.*..*.. |
4 *+. + *..*. * *.. |
3.5 ++ * *.. *..*. .. * |
| .. *..*..*.*..* |
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-O--O
4.5 ++--------------------------------------------------------------------+
| .*. .*.. *.. .*.. |
4 *+ *. .*.. + *..* *..*.. |
3.5 ++ *.*.. .*.. *..*..*.*. * * |
| *. + |
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-O--O
[*] 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,
Fengguang
View attachment "job.yaml" of type "text/plain" (1663 bytes)
View attachment "reproduce" of type "text/plain" (5107 bytes)
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