linux-kernel - [lkp] [Btrfs] c9dc4c65785: +9.8% fsmark.files_per

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Date:	Wed, 08 Jul 2015 10:16:40 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Chris Mason <clm@...com>
Cc:	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [lkp] [Btrfs] c9dc4c65785: +9.8% fsmark.files_per_sec

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit c9dc4c6578502c2085705347375b82089aad18d0 ("Btrfs: two stage dirty block group writeout")

testcase/path_params/tbox_group: fsmark/performance-1x-1t-1HDD-btrfs-4M-60G-NoSync/ivb44

4c6d1d85ad89fd8e  c9dc4c6578502c208570534737
----------------  --------------------------
    462211 ±  1%     +16.8%     539707 ±  0%  fsmark.app_overhead
     35.27 ±  0%      +9.8%      38.74 ±  1%  fsmark.files_per_sec
         9 ±  0%     +17.8%         10 ±  4%  fsmark.time.percent_of_cpu_this_job_got
      9864 ±  2%    +156.9%      25345 ±  4%  fsmark.time.voluntary_context_switches
       435 ±  0%      -9.0%        396 ±  1%  fsmark.time.elapsed_time
       435 ±  0%      -9.0%        396 ±  1%  fsmark.time.elapsed_time.max
     21057 ±  0%      -9.0%      19165 ±  1%  uptime.idle
     68983 ±  2%     +19.1%      82190 ±  4%  softirqs.RCU
    129619 ±  0%      +3.2%     133743 ±  0%  vmstat.io.bo
         1 ±  0%    +100.0%          2 ±  0%  vmstat.procs.b
     18873 ±  0%     +14.9%      21692 ±  1%  vmstat.system.cs
   1787510 ±  1%    +117.0%    3878984 ±  2%  meminfo.Dirty
   5585235 ±  0%     +25.5%    7011242 ±  0%  meminfo.Writeback
   8276795 ± 10%     +15.9%    9592682 ±  0%  numa-numastat.node0.local_node
   8287205 ± 10%     +16.0%    9611684 ±  0%  numa-numastat.node0.numa_hit
   2447873 ± 42%     -67.9%     785086 ± 33%  numa-numastat.node1.numa_hit
   2413662 ± 43%     -68.1%     771115 ± 31%  numa-numastat.node1.local_node
       435 ±  0%      -9.0%        396 ±  1%  time.elapsed_time
       435 ±  0%      -9.0%        396 ±  1%  time.elapsed_time.max
         9 ±  0%     +17.8%         10 ±  4%  time.percent_of_cpu_this_job_got
      0.41 ±  1%     +17.1%       0.48 ±  4%  time.user_time
      9864 ±  2%    +156.9%      25345 ±  4%  time.voluntary_context_switches
 5.189e+08 ±  0%     +72.6%  8.956e+08 ±  1%  cpuidle.C1-IVT.time
   4626942 ± 19%     +49.6%    6924087 ± 22%  cpuidle.C1E-IVT.time
   2646692 ±  7%     +75.0%    4630890 ± 23%  cpuidle.C3-IVT.time
 2.028e+10 ±  0%     -11.1%  1.803e+10 ±  1%  cpuidle.C6-IVT.time
    268137 ±  0%     +12.2%     300911 ±  2%  cpuidle.C6-IVT.usage
       222 ± 11%     +47.0%        326 ± 25%  cpuidle.POLL.usage
      0.69 ±  2%      +7.2%       0.74 ±  3%  turbostat.%Busy

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,
Ying Huang

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