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Date: Mon, 1 Aug 2016 13:18:20 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Mel Gorman <mgorman@...hsingularity.net>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>,
Vlastimil Babka <vbabka@...e.cz>,
Hillf Danton <hillf.zj@...baba-inc.com>,
Johannes Weiner <hannes@...xchg.org>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
Michal Hocko <mhocko@...nel.org>,
Minchan Kim <minchan@...nel.org>,
Rik van Riel <riel@...riel.com>,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [mm, page_alloc] f85cb5028c: netperf.Throughput_Mbps -16.5%
regression
FYI, we noticed a -16.5% regression of netperf.Throughput_Mbps due to commit:
commit f85cb5028c273692b2ac4f7f7e73f77ad2d5a3c2 ("mm, page_alloc: remove fair zone allocation policy")
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
in testcase: netperf
on test machine: 16 threads Broadwell-DE with 8G memory
with following parameters:
ip: ipv4
runtime: 900s
nr_threads: 25%
cluster: cs-localhost
test: TCP_STREAM
cpufreq_governor: performance
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.
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
cluster/compiler/cpufreq_governor/ip/kconfig/nr_threads/rootfs/runtime/tbox_group/test/testcase:
cs-localhost/gcc-6/performance/ipv4/x86_64-rhel/25%/debian-x86_64-2015-02-07.cgz/900s/lkp-bdw-de1/TCP_STREAM/netperf
commit:
23c17ad07f ("mm, vmscan: add classzone information to tracepoints")
f85cb5028c ("mm, page_alloc: remove fair zone allocation policy")
23c17ad07fba9303 f85cb5028c273692b2ac4f7f7e
---------------- --------------------------
fail:runs %reproduction fail:runs
| | |
:4 25% 1:4 kmsg.i2c_i2c-#:sendbytes:NAK_bailout
1:4 -25% :4 kmsg.usb#-#:can't_read_configurations,error
1:4 -25% :4 kmsg.usb#-#:unable_to_read_config_index#descriptor/all
%stddev %change %stddev
\ | \
29019 ± 1% -16.5% 24223 ± 2% netperf.Throughput_Mbps
12798 ± 6% -17.2% 10593 ± 9% netperf.time.involuntary_context_switches
334.50 ± 1% -13.4% 289.75 ± 1% netperf.time.percent_of_cpu_this_job_got
2941 ± 1% -13.8% 2536 ± 1% netperf.time.system_time
1491248 ± 7% +58.7% 2366463 ± 5% netperf.time.voluntary_context_switches
1896 ± 1% +9.6% 2077 ± 0% slabinfo.kmalloc-2048.active_objs
16.91 ± 4% +9.8% 18.57 ± 2% perf-profile.cycles-pp.copy_user_enhanced_fast_string.tcp_sendmsg.inet_sendmsg.sock_sendmsg.SYSC_sendto
0.83 ± 11% +24.0% 1.03 ± 10% perf-profile.cycles-pp.sk_stream_alloc_skb.tcp_sendmsg.inet_sendmsg.sock_sendmsg.SYSC_sendto
238789 ± 11% -76.8% 55338 ± 49% vmstat.system.cs
16823 ± 0% -1.5% 16570 ± 0% vmstat.system.in
1.884e+08 ± 5% -41.1% 1.11e+08 ± 10% softirqs.NET_RX
218456 ± 0% +18.4% 258550 ± 1% softirqs.RCU
1105427 ± 1% -11.8% 975484 ± 1% softirqs.SCHED
497245 ± 0% -89.0% 54772 ± 1% meminfo.Active
8511 ± 0% +543.5% 54765 ± 1% meminfo.Active(anon)
488733 ± 0% -100.0% 6.00 ± 0% meminfo.Active(file)
54898 ± 1% +790.2% 488733 ± 0% meminfo.Inactive(file)
2.098e+08 ± 12% -79.0% 44033424 ± 52% cpuidle.C1-BDW.time
1.011e+08 ± 11% -79.0% 21193683 ± 55% cpuidle.C1-BDW.usage
3.694e+08 ± 8% +91.5% 7.074e+08 ± 5% cpuidle.C3-BDW.time
1104487 ± 7% +81.0% 1999452 ± 5% cpuidle.C3-BDW.usage
83514559 ± 8% -34.1% 55042921 ± 10% cpuidle.POLL.time
2178797 ± 11% -79.1% 454769 ± 56% cpuidle.POLL.usage
2183 ± 2% -100.0% 0.00 ± -1% proc-vmstat.nr_alloc_batch
3.936e+08 ± 1% -15.7% 3.319e+08 ± 2% proc-vmstat.numa_hit
3.936e+08 ± 1% -15.7% 3.319e+08 ± 2% proc-vmstat.numa_local
7.693e+08 ± 1% -100.0% 0.00 ± 0% proc-vmstat.pgalloc_dma32
2.366e+09 ± 1% +11.5% 2.639e+09 ± 2% proc-vmstat.pgalloc_normal
3.135e+09 ± 1% -15.8% 2.639e+09 ± 2% proc-vmstat.pgfree
46.62 ± 0% -3.6% 44.94 ± 0% turbostat.%Busy
1165 ± 0% -3.6% 1124 ± 0% turbostat.Avg_MHz
1.09 ± 8% +77.2% 1.93 ± 4% turbostat.CPU%c3
10.71 ± 2% +43.7% 15.38 ± 5% turbostat.CPU%c6
39.17 ± 0% -3.9% 37.66 ± 0% turbostat.PkgWatt
19.89 ± 4% +20.1% 23.89 ± 2% turbostat.RAMWatt
1.06e+12 ± 4% -33.3% 7.073e+11 ± 9% perf-stat.branch-instructions
0.40 ± 3% +30.9% 0.52 ± 4% perf-stat.branch-miss-rate
4.228e+09 ± 1% -13.0% 3.68e+09 ± 4% perf-stat.branch-misses
8.141e+11 ± 2% -17.3% 6.732e+11 ± 4% perf-stat.cache-misses
8.141e+11 ± 2% -17.3% 6.732e+11 ± 4% perf-stat.cache-references
2.156e+08 ± 11% -76.8% 49969421 ± 49% perf-stat.context-switches
62562 ± 1% -7.4% 57921 ± 0% perf-stat.cpu-migrations
1.651e+13 ± 1% -3.2% 1.598e+13 ± 2% perf-stat.cycles
0.03 ± 4% +36.5% 0.04 ± 6% perf-stat.dTLB-load-miss-rate
2.614e+12 ± 3% -28.4% 1.871e+12 ± 5% perf-stat.dTLB-loads
9.526e+08 ± 25% -37.7% 5.935e+08 ± 17% perf-stat.dTLB-store-misses
1.958e+12 ± 3% -26.9% 1.432e+12 ± 4% perf-stat.dTLB-stores
1.169e+09 ± 9% -52.6% 5.539e+08 ± 15% perf-stat.iTLB-load-misses
1.186e+13 ± 5% -35.1% 7.702e+12 ± 9% perf-stat.instructions
10183 ± 3% +37.8% 14031 ± 6% perf-stat.instructions-per-iTLB-miss
0.72 ± 6% -33.0% 0.48 ± 8% perf-stat.ipc
246878 ± 25% -77.2% 56283 ±141% sched_debug.cfs_rq:/.MIN_vruntime.max
63597 ± 28% -74.7% 16086 ±146% sched_debug.cfs_rq:/.MIN_vruntime.stddev
0.77 ± 23% -36.7% 0.48 ± 32% sched_debug.cfs_rq:/.load_avg.min
246878 ± 25% -77.2% 56283 ±141% sched_debug.cfs_rq:/.max_vruntime.max
63597 ± 28% -74.7% 16086 ±146% sched_debug.cfs_rq:/.max_vruntime.stddev
322631 ± 2% -13.0% 280763 ± 6% sched_debug.cfs_rq:/.min_vruntime.stddev
320721 ± 33% +44.3% 462865 ± 21% sched_debug.cfs_rq:/.spread0.max
322633 ± 2% -13.0% 280765 ± 6% sched_debug.cfs_rq:/.spread0.stddev
657860 ± 3% +12.2% 738159 ± 1% sched_debug.cpu.avg_idle.avg
84895 ± 24% +239.0% 287807 ± 13% sched_debug.cpu.avg_idle.min
357850 ± 4% -20.4% 284765 ± 3% sched_debug.cpu.avg_idle.stddev
70.30 ± 3% +12.2% 78.85 ± 1% sched_debug.cpu.cpu_load[1].avg
70.58 ± 3% +11.9% 79.00 ± 1% sched_debug.cpu.cpu_load[2].avg
84932 ± 1% -9.1% 77174 ± 3% sched_debug.cpu.nr_load_updates.stddev
7370152 ± 5% -75.2% 1830136 ± 61% sched_debug.cpu.nr_switches.avg
14180734 ± 8% -71.7% 4014680 ± 60% sched_debug.cpu.nr_switches.max
1787548 ± 7% -81.2% 335812 ± 63% sched_debug.cpu.nr_switches.min
4217040 ± 9% -73.3% 1124694 ± 63% sched_debug.cpu.nr_switches.stddev
0.32 ± 23% -58.5% 0.13 ± 49% sched_debug.rt_rq:/.rt_time.max
netperf.Throughput_Mbps
35000 ++------------------------------------------------------------------+
| .* .* .* *. |
30000 ++ * ** ***.**** ***.* * ** : * ** **** * *.**
| : : : : : : : : : :* |
25000 OO OO O OO:O OO O O O : : : : : : : |
| : O O OO OOO OOO : :: : : :: : : : |
20000 ++:: : : :: : : :: : : : |
| :: : : :: : : :: : : : |
15000 ++: : : : :: : : :: : : : |
| : : : :: : : :: : : :: |
10000 ++: : : :: : : :: : : :: |
| : : : :: : : :: : : : |
5000 ++ : : :: : : :: : : : |
|: : : :: : : :: : : : |
0 **--***-**-------------------**--***-**----**--****-*---------*-----+
[*] bisect-good sample
[O] bisect-bad sample
Thanks,
Xiaolong
View attachment "config-4.7.0-rc7-00317-gf85cb50" of type "text/plain" (151037 bytes)
View attachment "job.yaml" of type "text/plain" (4006 bytes)
View attachment "reproduce" of type "text/plain" (428 bytes)
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