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Date: Tue, 14 Mar 2017 10:09:47 +0800
From: Chao Yu <yuchao0@...wei.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>,
Thorsten Leemhuis <regressions@...mhuis.info>,
kernel test robot <xiaolong.ye@...el.com>
CC: <lkp@...org>, <linux-kernel@...r.kernel.org>
Subject: Re: [lkp-robot] [f2fs] 4ac912427c: -33.7% aim7.jobs-per-min
regression
On 2017/3/14 3:22, Jaegeuk Kim wrote:
> On 03/13, Thorsten Leemhuis wrote:
>> @Chao Yu/@...geuk Kim: I'm considering to add this to the regressions
>> report for 4.11; or is there a reason why it shouldn't be considered a
>> regression? Ciao, Thorsten
>
> Hi,
>
> I'm planning to submit f2fs updates for 4.11-rcX including a patch which
> resolves this issue as well, as I expect.
>
> https://lkml.org/lkml/2017/3/7/813
Sorry for late repay.
I expect below patches in Jaegeuk's tree could help to recover the performance
as well
f2fs: skip scanning free nid bitmap of full NAT blocks
f2fs: combine nat_bits and free_nid_bitmap cache
Xiaolong, Thorsten
Could you help to test these patches?
Thanks,
>
> Thanks,
>
>>
>> On 08.03.2017 02:21, kernel test robot wrote:
>>>
>>> Greeting,
>>>
>>> We noticed a -33.7 regression of aim7.jobs-per-min due to commit:
>>>
>>> commit: 4ac912427c4214d8031d9ad6fbc3bc75e71512df ("f2fs: introduce free nid bitmap")
>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>>
>>> in testcase: aim7
>>> on test machine: 40 threads Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz with 384G memory
>>> with following parameters:
>>>
>>> disk: 1BRD_48G
>>> fs: f2fs
>>> test: disk_wrt
>>> load: 3000
>>> cpufreq_governor: performance
>>>
>>> test-description: AIM7 is a traditional UNIX system level benchmark suite which is used to test and measure the performance of multiuser system.
>>> test-url: https://sourceforge.net/projects/aimbench/files/aim-suite7/
>>>
>>>
>>>
>>> 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
>>>
>>> testcase/path_params/tbox_group/run: aim7/1BRD_48G-f2fs-disk_wrt-3000-performance/lkp-ivb-ep01
>>>
>>> ced2c7ea8e99b467 4ac912427c4214d8031d9ad6fb
>>> ---------------- --------------------------
>>> %stddev change %stddev
>>> \ | \
>>> 117419 ± 1% -33.7% 77863 ± 0% aim7.jobs-per-min
>>> 153.78 ± 1% +50.6% 231.63 ± 0% aim7.time.elapsed_time
>>> 153.78 ± 1% +50.6% 231.63 ± 0% aim7.time.elapsed_time.max
>>> 805644 ± 3% +11.3% 896604 ± 0% aim7.time.involuntary_context_switches
>>> 5408 ± 1% +15.4% 6240 ± 0% aim7.time.system_time
>>> 5066069 ± 0% +10.5% 5600256 ± 9% meminfo.DirectMap2M
>>> 135538 ± 8% -41.9% 78738 ± 8% meminfo.Dirty
>>> 980.67 ± 16% -67.8% 315.50 ± 12% meminfo.Writeback
>>> 71322 ± 10% -44.0% 39953 ± 1% numa-meminfo.node0.Dirty
>>> 11158 ± 18% -27.1% 8132 ± 0% numa-meminfo.node0.Mapped
>>> 56776 ± 6% -32.5% 38309 ± 0% numa-meminfo.node1.Dirty
>>> 9684 ± 22% +30.9% 12676 ± 0% numa-meminfo.node1.Mapped
>>> 6069 ± 57% -78.1% 1328 ± 18% softirqs.NET_RX
>>> 619333 ± 4% +8.0% 669152 ± 3% softirqs.RCU
>>> 128030 ± 2% +33.3% 170724 ± 0% softirqs.SCHED
>>> 2331994 ± 1% +15.3% 2688290 ± 0% softirqs.TIMER
>>> 7701 ± 1% -35.7% 4948 ± 3% vmstat.io.bo
>>> 64.67 ± 2% -39.7% 39.00 ± 2% vmstat.procs.b
>>> 333.33 ± 7% -48.5% 171.50 ± 2% vmstat.procs.r
>>> 17530 ± 1% -23.4% 13425 ± 1% vmstat.system.cs
>>> 47642 ± 1% -5.3% 45100 ± 1% vmstat.system.in
>>> 33522 ± 4% -43.1% 19068 ± 0% proc-vmstat.nr_dirty
>>> 236.00 ± 14% -66.1% 80.00 ± 3% proc-vmstat.nr_writeback
>>> 33907 ± 4% -43.3% 19222 ± 0% proc-vmstat.nr_zone_write_pending
>>> 28194 ± 10% +10.4% 31131 ± 6% proc-vmstat.pgactivate
>>> 746402 ± 2% +24.6% 929960 ± 3% proc-vmstat.pgfault
>>> 153.78 ± 1% +50.6% 231.63 ± 0% time.elapsed_time
>>> 153.78 ± 1% +50.6% 231.63 ± 0% time.elapsed_time.max
>>> 805644 ± 3% +11.3% 896604 ± 0% time.involuntary_context_switches
>>> 3524 ± 0% -23.4% 2701 ± 0% time.percent_of_cpu_this_job_got
>>> 5408 ± 1% +15.4% 6240 ± 0% time.system_time
>>> 12.19 ± 1% +36.7% 16.66 ± 0% time.user_time
>>> 48260939 ± 3% +12.1% 54110616 ± 2% cpuidle.C1-IVT.time
>>> 33149237 ± 5% +52.6% 50597349 ± 1% cpuidle.C1E-IVT.time
>>> 89642 ± 4% +52.8% 136976 ± 0% cpuidle.C1E-IVT.usage
>>> 13534795 ± 6% +276.3% 50934566 ± 55% cpuidle.C3-IVT.time
>>> 42893 ± 6% +138.8% 102439 ± 30% cpuidle.C3-IVT.usage
>>> 6.431e+08 ± 2% +390.1% 3.152e+09 ± 10% cpuidle.C6-IVT.time
>>> 802009 ± 2% +375.3% 3811880 ± 10% cpuidle.C6-IVT.usage
>>> 1535987 ± 4% +156.3% 3936830 ± 4% cpuidle.POLL.time
>>> 88.14 ± 0% -24.9% 66.17 ± 3% turbostat.%Busy
>>> 2659 ± 0% -44.7% 1471 ± 3% turbostat.Avg_MHz
>>> 3016 ± 0% -26.3% 2224 ± 0% turbostat.Bzy_MHz
>>> 5.20 ± 5% +127.0% 11.80 ± 2% turbostat.CPU%c1
>>>
>>>
>>>
>>> perf-stat.page-faults
>>>
>>> 1e+06 ++-----------------------------------------------------------------+
>>> 900000 O+O O O O O O O O |
>>> | O O O O O O O O O O |
>>> 800000 ++ .*.*. .*. .*. .*.. |
>>> 700000 ++*.*.*.*.*..*.* *.*.*.*.*.*..*.* * *.*.*.*.* *.*.*.* *
>>> | : : |
>>> 600000 ++: : |
>>> 500000 ++ : :|
>>> 400000 ++ : :|
>>> |: : :|
>>> 300000 ++ : :|
>>> 200000 ++ : :|
>>> | : |
>>> 100000 ++ : |
>>> 0 *+------------------------------------O-O------------------------*-+
>>>
>>>
>>> perf-stat.minor-faults
>>>
>>> 1e+06 ++-----------------------------------------------------------------+
>>> 900000 O+O O O O O O O O |
>>> | O O O O O O O O O O |
>>> 800000 ++ .*.*. .*. .*. .*.. |
>>> 700000 ++*.*.*.*.*..*.* *.*.*.*.*.*..*.* * *.*.*.*.* *.*.*.* *
>>> | : : |
>>> 600000 ++: : |
>>> 500000 ++ : :|
>>> 400000 ++ : :|
>>> |: : :|
>>> 300000 ++ : :|
>>> 200000 ++ : :|
>>> | : |
>>> 100000 ++ : |
>>> 0 *+------------------------------------O-O------------------------*-+
>>>
>>>
>>> aim7.jobs-per-min
>>>
>>> 140000 ++-----------------------------------------------------------------+
>>> | *. .*.. .*.*.*.*.*.*.*..*.*.*.*.*.*. |
>>> 120000 ++: *.*.* *.*.* *.*.*.*.*..*.*.*. *
>>> | : * |
>>> 100000 ++: : |
>>> |: : |
>>> 80000 O+O O O O O O O O O O O O O O O O O O : :|
>>> |: : :|
>>> 60000 ++ : :|
>>> |: : :|
>>> 40000 ++ : :|
>>> | : :|
>>> 20000 ++ : |
>>> | : |
>>> 0 *+------------------------------------O-O------------------------*-+
>>>
>>>
>>>
>>> [*] 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
>>>
>
> .
>
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