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Date: Sun, 7 Aug 2016 22:15:06 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Mel Gorman <mgorman@...hsingularity.net>
Cc: LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [mm, page_alloc] 194c9de225: netperf.Throughput_Mbps 2.5%
improvement
FYI, we noticed a 2.5% improvement of netperf.Throughput_Mbps due to commit:
commit 194c9de2256fa001eb69dfba48dbb6d1b2562bc7 ("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: 200%
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/200%/debian-x86_64-2015-02-07.cgz/900s/lkp-bdw-de1/TCP_STREAM/netperf
commit:
3f44f76ad2 ("mm, vmscan: add classzone information to tracepoints")
194c9de225 ("mm, page_alloc: remove fair zone allocation policy")
3f44f76ad2128d47 194c9de2256fa001eb69dfba48
---------------- --------------------------
fail:runs %reproduction fail:runs
| | |
:4 25% 1:4 kmsg.i2c_i2c-#:sendbytes:NAK_bailout
%stddev %change %stddev
\ | \
2468 ± 0% +2.5% 2529 ± 0% netperf.Throughput_Mbps
219017 ± 2% -30.5% 152291 ± 5% netperf.time.involuntary_context_switches
578.25 ± 0% -9.7% 522.00 ± 0% netperf.time.percent_of_cpu_this_job_got
5093 ± 0% -9.8% 4593 ± 0% netperf.time.system_time
122.55 ± 0% -8.1% 112.67 ± 0% netperf.time.user_time
2504387 ± 0% +7.0% 2680007 ± 0% netperf.time.voluntary_context_switches
146422 ± 0% -1.5% 144221 ± 0% interrupts.CAL:Function_call_interrupts
100998 ± 7% -10.7% 90170 ± 0% softirqs.SCHED
647822 ± 82% -68.2% 205753 ± 15% cpuidle.C3-BDW.time
15.50 ± 30% +295.2% 61.25 ± 94% cpuidle.POLL.usage
3642 ± 7% -11.5% 3222 ± 3% slabinfo.cred_jar.active_objs
3642 ± 7% -11.5% 3222 ± 3% slabinfo.cred_jar.num_objs
0.08 ± 19% +31.3% 0.11 ± 4% turbostat.Pkg%pc6
25.95 ± 0% -1.0% 25.69 ± 0% turbostat.RAMWatt
2002 ± 2% -100.0% 0.00 ± -1% proc-vmstat.nr_alloc_batch
5.247e+08 ± 0% -100.0% 0.00 ± 0% proc-vmstat.pgalloc_dma32
1.601e+09 ± 0% +36.0% 2.178e+09 ± 0% proc-vmstat.pgalloc_normal
509575 ± 0% -83.9% 82003 ± 0% meminfo.Active
8151 ± 1% +905.9% 81996 ± 0% meminfo.Active(anon)
501423 ± 0% -100.0% 7.00 ± 0% meminfo.Active(file)
78991 ± 4% -9.7% 71311 ± 5% meminfo.DirectMap4k
79524 ± 3% +530.6% 501442 ± 0% meminfo.Inactive(file)
9.00 ± 7% -18.6% 7.33 ± 2% sched_debug.cpu.clock.stddev
9.00 ± 7% -18.6% 7.33 ± 2% sched_debug.cpu.clock_task.stddev
1408 ± 3% -13.8% 1213 ± 11% sched_debug.cpu.curr->pid.stddev
3685 ± 35% -66.1% 1248 ± 11% sched_debug.cpu.nr_load_updates.stddev
0.00 ±173% +1424.9% 0.00 ± 52% sched_debug.rt_rq:/.rt_time.min
4.66 ± 1% +9.0% 5.08 ± 1% perf-profile.cycles-pp.__do_softirq.do_softirq_own_stack.do_softirq.part.13.__local_bh_enable_ip.ip_finish_output2
4.72 ± 1% +8.6% 5.12 ± 1% perf-profile.cycles-pp.__local_bh_enable_ip.ip_finish_output2.ip_finish_output.ip_output.ip_local_out
24.39 ± 1% -10.0% 21.94 ± 1% perf-profile.cycles-pp.copy_user_enhanced_fast_string.tcp_sendmsg.inet_sendmsg.sock_sendmsg.SYSC_sendto
4.71 ± 1% +8.9% 5.12 ± 1% perf-profile.cycles-pp.do_softirq.part.13.__local_bh_enable_ip.ip_finish_output2.ip_finish_output.ip_output
4.68 ± 1% +9.1% 5.11 ± 1% perf-profile.cycles-pp.do_softirq_own_stack.do_softirq.part.13.__local_bh_enable_ip.ip_finish_output2.ip_finish_output
1.29 ± 4% +19.1% 1.53 ± 2% perf-profile.cycles-pp.free_one_page.__free_pages_ok.free_compound_page.__put_compound_page.__put_page
4.56 ± 1% +8.9% 4.96 ± 1% perf-profile.cycles-pp.net_rx_action.__do_softirq.do_softirq_own_stack.do_softirq.part.13.__local_bh_enable_ip
4.48 ± 1% +8.8% 4.88 ± 1% perf-profile.cycles-pp.process_backlog.net_rx_action.__do_softirq.do_softirq_own_stack.do_softirq.part.13
34.16 ± 1% -8.6% 31.23 ± 0% perf-profile.cycles-pp.tcp_sendmsg.inet_sendmsg.sock_sendmsg.SYSC_sendto.sys_sendto
1.03 ± 1% -14.6% 0.88 ± 2% perf-profile.func.cycles-pp.get_page_from_freelist
1.18 ± 9% +30.2% 1.53 ± 5% perf-profile.func.cycles-pp.native_queued_spin_lock_slowpath
2.57 ± 2% -13.6% 2.22 ± 1% perf-profile.func.cycles-pp.tcp_sendmsg
5.257e+11 ± 0% +2.5% 5.39e+11 ± 0% perf-stat.branch-instructions
0.55 ± 0% +5.8% 0.58 ± 0% perf-stat.branch-miss-rate
2.869e+09 ± 0% +8.5% 3.113e+09 ± 0% perf-stat.branch-misses
0.03 ± 4% -6.1% 0.03 ± 4% perf-stat.dTLB-load-miss-rate
1.465e+12 ± 0% +2.3% 1.499e+12 ± 0% perf-stat.dTLB-loads
1.121e+12 ± 0% +2.3% 1.147e+12 ± 0% perf-stat.dTLB-stores
87.66 ± 8% -18.9% 71.08 ± 7% perf-stat.iTLB-load-miss-rate
1.744e+08 ± 2% +7.7% 1.878e+08 ± 2% perf-stat.iTLB-load-misses
26237761 ± 70% +197.5% 78044825 ± 28% perf-stat.iTLB-loads
2.923e+12 ± 0% +2.4% 2.993e+12 ± 0% perf-stat.instructions
16771 ± 2% -4.9% 15949 ± 2% perf-stat.instructions-per-iTLB-miss
0.08 ± 0% +2.4% 0.09 ± 0% perf-stat.ipc
netperf.Throughput_Mbps
3000 ++-------------------------------------------------------------------+
| |
2500 OOO OOOOO OOOO.OOOOO.OOOOO.O* **.**** .***
| *.* *** : *.* *** ** *.** * |
| : : : : : : : : :: : |
2000 ++: : : : : : : : :: : |
| : : : : : : : : :: : |
1500 ++: : : : : : : : :: : |
| : : : : : : : : :: : |
1000 ++ : : :: : : : : : : |
|: : : :: : : : : : : |
|: : : :: : : : : : : |
500 ++ : : :: : : :: : : |
|: : : :: : : :: : : |
0 **---****-*------------------**---***-**----**--*-****---------------+
[*] bisect-good sample
[O] bisect-bad sample
Thanks,
Xiaolong
View attachment "config-4.7.0-rc7-00317-g194c9de" of type "text/plain" (151365 bytes)
View attachment "job.yaml" of type "text/plain" (4055 bytes)
View attachment "reproduce" of type "text/plain" (2472 bytes)
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