From: Fengguang Wu <fengguang.wu@intel.com>
To: lkp@lists.01.org
Subject: Re: [sched] cec017ed87c: -35.9% fileio.requests_per_sec
Date: Thu, 26 Jun 2014 10:25:44 +0800 [thread overview]
Message-ID: <20140626022544.GD14734@localhost> (raw)
In-Reply-To: <0DA73B5D686AEC4AAEF6054BE04DA1CD118955BA@shsmsx102.ccr.corp.intel.com>
[-- Attachment #1: Type: text/plain, Size: 11838 bytes --]
Yuyang,
On Thu, Jun 26, 2014 at 10:20:14AM +0800, Du, Yuyang wrote:
> Thanks, Fengguang. As what I understand, this is pretty good result, right? Only I did not expect to be so big an impact.
Unfortunately it looks like a performance regression: the fileio
throughput dropped by 35.9%.
Thanks,
Fengguang
> -----Original Message-----
> From: Wu, Fengguang
> Sent: Thursday, June 26, 2014 10:06 AM
> To: Du, Yuyang
> Cc: Hansen, Dave; lkp(a)01.org; Chen, Jet
> Subject: [sched] cec017ed87c: -35.9% fileio.requests_per_sec
>
> Yuyang,
>
> FYI, we noticed the below changes on
>
> git://bee.sh.intel.com/git/ydu19/linux cc-v3-on-3.15-rc8 commit cec017ed87c7e5298fabaf1718f4f3c0fada0adb ("Remove update_rq_runnable_avg")
>
> Test case: snb-drag/fileio/600s-100%-1HDD-xfs-64G-1024f-seqrewr-sync
>
> v3.15-rc8 cec017ed87c7e5298fabaf171
> --------------- -------------------------
> 6522 ~ 0% -35.9% 4183 ~ 0% TOTAL fileio.requests_per_sec
> 26744 ~11% -87.8% 3251 ~ 0% TOTAL proc-vmstat.workingset_nodereclaim
> 117412 ~ 0% -74.7% 29747 ~ 0% TOTAL proc-vmstat.slabs_scanned
> 1833 ~ 3% -63.8% 664 ~ 5% TOTAL proc-vmstat.kswapd_high_wmark_hit_quickly
> 2959 ~ 2% -45.6% 1610 ~ 2% TOTAL proc-vmstat.pageoutrun
> 7158189 ~ 0% -39.1% 4359933 ~ 0% TOTAL proc-vmstat.pgsteal_kswapd_dma32
> 7225747 ~ 0% -39.0% 4410503 ~ 0% TOTAL proc-vmstat.pgsteal_kswapd_normal
> 7202579 ~ 0% -38.8% 4406846 ~ 0% TOTAL proc-vmstat.pgscan_kswapd_dma32
> 7272151 ~ 0% -38.7% 4461197 ~ 0% TOTAL proc-vmstat.pgscan_kswapd_normal
> 3305425 ~ 0% -37.9% 2052786 ~ 0% TOTAL cpuidle.C1-SNB.usage
> 15453350 ~ 0% -36.5% 9816203 ~ 0% TOTAL proc-vmstat.nr_written
> 15454708 ~ 0% -36.6% 9790561 ~ 0% TOTAL proc-vmstat.pgfree
> 61898955 ~ 0% -36.4% 39352814 ~ 0% TOTAL proc-vmstat.pgpgout
> 62643 ~ 0% -35.9% 40129 ~ 0% TOTAL softirqs.BLOCK
> 15654950 ~ 0% -35.9% 10040787 ~ 0% TOTAL proc-vmstat.nr_dirtied
> 16729217 ~ 0% -33.9% 11065396 ~ 0% TOTAL proc-vmstat.numa_hit
> 16729217 ~ 0% -33.9% 11065396 ~ 0% TOTAL proc-vmstat.numa_local
> 8354814 ~ 0% -33.8% 5534438 ~ 0% TOTAL proc-vmstat.pgalloc_dma32
> 8419660 ~ 0% -33.8% 5575636 ~ 0% TOTAL proc-vmstat.pgalloc_normal
> 42342300 ~ 3% -31.0% 29195355 ~ 3% TOTAL cpuidle.C3-SNB.time
> 40089990 ~ 3% -28.1% 28834724 ~ 2% TOTAL cpuidle.C1E-SNB.time
> 26312 ~ 3% -27.6% 19054 ~ 2% TOTAL cpuidle.C3-SNB.usage
> 38112 ~ 3% -19.3% 30755 ~ 1% TOTAL cpuidle.C1E-SNB.usage
> 1122 ~ 1% +11.2% 1248 ~ 3% TOTAL proc-vmstat.pgactivate
> 330418 ~ 4% -11.7% 291792 ~ 1% TOTAL cpuidle.C6-SNB.usage
> 650 ~11% +69.8% 1103 ~ 0% TOTAL iostat.sda.w_await
> 650 ~11% +69.8% 1103 ~ 0% TOTAL iostat.sda.await
> 3540598 ~ 0% -35.9% 2269116 ~ 0% TOTAL time.voluntary_context_switches
> 1.252e+08 ~ 0% -35.9% 80326643 ~ 0% TOTAL time.file_system_outputs
> 94546 ~11% -31.3% 64935 ~ 0% TOTAL iostat.sda.wkB/s
> 186 ~11% -31.3% 128 ~ 0% TOTAL iostat.sda.w/s
> 94678 ~11% -31.3% 65072 ~ 0% TOTAL vmstat.io.bo
> 50.09 ~ 0% -34.6% 32.75 ~ 0% TOTAL time.system_time
> 11273 ~11% -29.4% 7964 ~ 0% TOTAL vmstat.system.cs
> 1.56 ~11% -27.8% 1.12 ~ 0% TOTAL iostat.sda.wrqm/s
> 131.77 ~11% +8.1% 142.40 ~ 0% TOTAL iostat.sda.avgqu-sz
> 662 ~14% -9.0% 602 ~ 0% TOTAL time.elapsed_time
>
> Legend:
> ~XX% - stddev percent
> [+-]XX% - change percent
>
>
> time.system_time
>
> 55 ++---------------------------------------------------------------------+
> | |
> 50 *+...*...*....*....*....*...* |
> 45 ++ |
> | |
> 40 ++ |
> | |
> 35 ++ |
> | O O O O O O O O O O O
> 30 ++ |
> 25 ++ |
> | |
> 20 ++ |
> O O O O O |
> 15 ++---------------------------------------------------------------------+
>
>
> time.voluntary_context_switches
>
> 4e+06 ++----------------------------------------------------------------+
> | |
> 3.5e+06 *+..*....*...*....*...*...* |
> 3e+06 ++ |
> | |
> 2.5e+06 ++ |
> | O O O O O O O O O O O
> 2e+06 ++ |
> | |
> 1.5e+06 ++ |
> 1e+06 ++ |
> | |
> 500000 ++ |
> O O O O O |
> 0 ++----------------------------------------------------------------+
>
>
> time.file_system_outputs
>
> 1.3e+08 ++---------------------------------------------------------------+
> 1.25e+08 *+..*....*...*...*....*...* |
> | |
> 1.2e+08 ++ |
> 1.15e+08 ++ |
> | |
> 1.1e+08 ++ |
> 1.05e+08 ++ |
> 1e+08 ++ |
> | |
> 9.5e+07 ++ |
> 9e+07 ++ |
> | |
> 8.5e+07 ++ |
> 8e+07 O+--O----O---O---O----O---O---O----O---O---O----O---O---O----O---O
>
>
> fileio.requests_per_sec
>
> 7000 ++-------------------------------------------------------------------+
> | |
> 6500 *+...*...*....*...*....*....* |
> | |
> | |
> 6000 ++ |
> | |
> 5500 ++ |
> | |
> 5000 ++ |
> | |
> | |
> 4500 ++ |
> O O O O O O O O O O O O O O O O
> 4000 ++-------------------------------------------------------------------+
>
>
> iostat.sda.await
>
> 1200 ++-------------------------------------------------------------------+
> | |
> 1100 O+ O O O O O O O O O O O O O O O
> 1000 ++ |
> | |
> 900 ++ |
> | |
> 800 ++ |
> | |
> 700 ++ ..*...*....*...*. * |
> 600 *+. .. . |
> | . .. |
> 500 ++ . |
> | * |
> 400 ++-------------------------------------------------------------------+
>
>
> iostat.sda.w_await
>
> 1200 ++-------------------------------------------------------------------+
> | |
> 1100 O+ O O O O O O O O O O O O O O O
> 1000 ++ |
> | |
> 900 ++ |
> | |
> 800 ++ |
> | |
> 700 ++ ..*...*....*...*. * |
> 600 *+. .. . |
> | . .. |
> 500 ++ . |
> | * |
> 400 ++-------------------------------------------------------------------+
>
>
> [*] 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,
> Fengguang
next prev parent reply other threads:[~2014-06-26 2:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-26 2:06 [sched] cec017ed87c: -35.9% fileio.requests_per_sec Fengguang Wu
2014-06-26 2:20 ` Du, Yuyang
2014-06-26 2:25 ` Fengguang Wu [this message]
2014-06-26 2:28 ` Du, Yuyang
2014-06-26 2:35 ` Du, Yuyang
2014-06-26 4:10 ` Fengguang Wu
2014-06-26 4:33 ` Du, Yuyang
2014-06-26 4:45 ` Fengguang Wu
2014-07-02 3:30 ` Du, Yuyang
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