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Date: Mon, 14 Aug 2017 14:02:29 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Huang Ying <ying.huang@...el.com>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>,
Johannes Weiner <hannes@...xchg.org>,
Minchan Kim <minchan@...nel.org>,
Hugh Dickins <hughd@...gle.com>, Shaohua Li <shli@...nel.org>,
Rik van Riel <riel@...hat.com>,
Andrea Arcangeli <aarcange@...hat.com>,
"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
Michal Hocko <mhocko@...nel.org>,
Dan Williams <dan.j.williams@...el.com>,
Jens Axboe <axboe@...nel.dk>,
Vishal L Verma <vishal.l.verma@...el.com>,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp-robot] [mm, THP, swap] bc10bfca14: vm-scalability.throughput
41% improvement
Greeting,
FYI, we noticed a 41% improvement of vm-scalability.throughput due to commit:
commit: bc10bfca146d99bfffbef9097adc7137b67b2e0f ("mm, THP, swap: delay splitting THP after swapped out")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: vm-scalability
on test machine: 72 threads Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 128G memory
with following parameters:
runtime: 300
thp_enabled: always
thp_defrag: always
nr_task: 8
nr_pmem: 4
priority: 1
test: swap-w-seq
cpufreq_governor: performance
test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us.
test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/
In addition to that, the commit also has significant impact on the following tests:
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
testcase/path_params/tbox_group/run: vm-scalability/300-always-always-8-4-1-swap-w-seq-performance/lkp-hsw-ep2
e4348307815c5830 bc10bfca146d99bfffbef9097a
---------------- --------------------------
%stddev change %stddev
\ | \
8564707 41% 12093174 vm-scalability.throughput
1096711 ± 3% 42% 1553582 ± 3% vm-scalability.median
73.55 ± 11% -38% 45.77 ± 10% vm-scalability.time.system_time
285897 ± 18% -76% 69639 ± 7% vm-scalability.time.minor_page_faults
12549 ± 4% -98% 260 ± 3% vm-scalability.time.voluntary_context_switches
54008 ± 3% -99% 808 ± 8% vm-scalability.time.involuntary_context_switches
172096 ± 12% -35% 112544 ± 7% interrupts.CAL:Function_call_interrupts
3653557 33% 4873708 vmstat.swap.so
943 ± 4% 31% 1238 ± 3% vmstat.swap.si
80147 -5% 76151 vmstat.system.in
9411 -77% 2120 ± 6% vmstat.system.cs
35286344 35% 47806919 ± 5% perf-stat.node-stores
22.72 ± 3% -15% 19.34 ± 5% perf-stat.cache-miss-rate%
15361902 ± 7% -25% 11452363 ± 4% perf-stat.iTLB-load-misses
1.79e+11 ± 10% -23% 1.383e+11 ± 12% perf-stat.branch-instructions
0.11 ± 5% -26% 0.08 ± 10% perf-stat.branch-miss-rate%
6.427e+10 ± 12% -19% 5.174e+10 ± 6% perf-stat.dTLB-stores
6.621e+11 ± 10% -28% 4.761e+11 ± 12% perf-stat.instructions
5997 ± 10% -28% 4312 ± 12% perf-stat.path-length
24736475 ± 10% -23% 18993505 ± 7% perf-stat.iTLB-loads
2.215e+09 ± 11% -30% 1.559e+09 ± 11% perf-stat.cache-references
0.02 ± 15% -31% 0.01 ± 9% perf-stat.dTLB-store-miss-rate%
5.231e+11 ± 12% -31% 3.591e+11 ± 11% perf-stat.cpu-cycles
0.03 ± 15% -34% 0.02 ± 5% perf-stat.dTLB-load-miss-rate%
10603404 ± 12% -44% 5953972 perf-stat.dTLB-store-misses
30276435 ± 13% -42% 17437436 ± 4% perf-stat.dTLB-load-misses
3.168e+08 ± 8% -32% 2.154e+08 ± 12% perf-stat.node-loads
1.88e+08 ± 8% -43% 1.065e+08 ± 3% perf-stat.branch-misses
5.052e+08 ± 14% -40% 3.028e+08 ± 16% perf-stat.cache-misses
15.65 ± 10% -46% 8.48 ± 20% perf-stat.node-load-miss-rate%
330534 ± 16% -68% 107083 ± 3% perf-stat.page-faults
327347 ± 16% -68% 103830 ± 4% perf-stat.minor-faults
58413164 ± 7% -65% 20572044 ± 33% perf-stat.node-load-misses
158697 -87% 21118 perf-stat.context-switches
vm-scalability.throughput
1.3e+07 ++---------------------------------------------------------------+
1.25e+07 O+ OO O |
| O O O O O O O O O O O O O |
1.2e+07 ++ O O O O O O |
1.15e+07 ++ |
1.1e+07 ++ |
1.05e+07 ++ |
| |
1e+07 ++ |
9.5e+06 ++ |
9e+06 ++ .* |
8.5e+06 *+*.*.*.* *. .* .**.*.*.*.*.*.*.*.*. .**. .*.*.*.|
| *.* + .*.*.*. .*.* * * *
8e+06 ++ * * |
7.5e+06 ++---------------------------------------------------------------+
vm-scalability.median
1.7e+06 ++----------------------------------------------------------------+
| O |
1.6e+06 O+ O O O O |
| O O O O O O O O O O O |
1.5e+06 ++ O O O O O O |
1.4e+06 ++ |
| |
1.3e+06 ++ |
| |
1.2e+06 ++ *. * |
1.1e+06 ++ + *. * .*. + + |
*.*.*.*.* *.* + .*.*.*. .*.*.*.*.*.*.*.*.*.**. .* *.* *.*
1e+06 ++ * *.* * |
| |
900000 ++----------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
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
View attachment "config-4.13.0-rc4-00283-gbc10bfc" of type "text/plain" (161024 bytes)
View attachment "job-script" of type "text/plain" (7570 bytes)
View attachment "job.yaml" of type "text/plain" (5049 bytes)
View attachment "reproduce" of type "text/plain" (1078 bytes)
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