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Date:	Fri, 25 Jul 2014 14:20:40 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Filipe David Borba Manana <fdmanana@...il.com>
CC:	Josef Bacik <jbacik@...com>, LKML <linux-kernel@...r.kernel.org>,
	lkp@...org
Subject: [LKP] [Btrfs] d5f375270aa: -20.0% fsmark.app_overhead

FYI, we noticed the below changes on

commit d5f375270aa55794f4a7196b5247469f86278a8f ("Btrfs: faster/more efficient insertion of file extent items")

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    914752 ~ 1%      -1.4%     902289 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
   2811730 ~ 0%     -26.0%    2080244 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
   3726483 ~ 0%     -20.0%    2982534 ~ 0%  TOTAL fsmark.app_overhead

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
       611 ~ 0%      +5.6%        645 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
      1072 ~ 0%      -9.7%        968 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
      1684 ~ 0%      -4.2%       1613 ~ 0%  TOTAL fsmark.files_per_sec

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
   7577550 ~14%     -59.6%    3058053 ~ 7%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
   7577550 ~14%     -59.6%    3058053 ~ 7%  TOTAL cpuidle.C1E-NHM.time

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    105466 ~ 2%     +26.4%     133267 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
    516731 ~ 2%     +45.1%     749581 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    622197 ~ 2%     +41.9%     882848 ~ 0%  TOTAL cpuidle.C1-NHM.usage

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    612557 ~ 8%     +36.5%     836424 ~ 2%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    612557 ~ 8%     +36.5%     836424 ~ 2%  TOTAL proc-vmstat.pgpgout

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
       409 ~ 8%     +28.9%        528 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
       409 ~ 8%     +28.9%        528 ~ 1%  TOTAL cpuidle.POLL.usage

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    203846 ~ 5%     +23.1%     250960 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    203846 ~ 5%     +23.1%     250960 ~ 1%  TOTAL meminfo.Active(file)

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     50935 ~ 5%     +23.1%      62696 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     50935 ~ 5%     +23.1%      62696 ~ 1%  TOTAL proc-vmstat.nr_active_file

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
  27799300 ~ 1%     +21.8%   33847790 ~ 5%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
  27799300 ~ 1%     +21.8%   33847790 ~ 5%  TOTAL cpuidle.C1-NHM.time

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    239715 ~ 4%     +19.7%     287020 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    239715 ~ 4%     +19.7%     287020 ~ 1%  TOTAL meminfo.Active

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     12.50 ~ 2%     +17.0%      14.62 ~ 3%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
     12.50 ~ 2%     +17.0%      14.62 ~ 3%  TOTAL turbostat.%c1

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
  35865226 ~ 4%      -8.9%   32690229 ~ 3%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
  53265661 ~ 5%     +22.6%   65295599 ~ 4%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
  89130888 ~ 5%      +9.9%   97985828 ~ 4%  TOTAL cpuidle.C3-NHM.time

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    177363 ~ 3%     +15.7%     205258 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    177363 ~ 3%     +15.7%     205258 ~ 1%  TOTAL proc-vmstat.nr_written

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
 2.799e+08 ~ 2%     +14.4%  3.202e+08 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
 2.799e+08 ~ 2%     +14.4%  3.202e+08 ~ 1%  TOTAL cpuidle.C6-NHM.time

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      8995 ~ 4%      +9.2%       9824 ~ 3%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
      8995 ~ 4%      +9.2%       9824 ~ 3%  TOTAL cpuidle.C1E-NHM.usage

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    145906 ~ 1%     +12.6%     164283 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    145906 ~ 1%     +12.6%     164283 ~ 1%  TOTAL cpuidle.C6-NHM.usage

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    181623 ~ 3%     +13.3%     205797 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    181623 ~ 3%     +13.3%     205797 ~ 1%  TOTAL proc-vmstat.nr_dirtied

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     12831 ~ 0%     +11.4%      14297 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     12831 ~ 0%     +11.4%      14297 ~ 0%  TOTAL slabinfo.btrfs_extent_buffer.num_objs

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     12830 ~ 0%     +11.4%      14294 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     12830 ~ 0%     +11.4%      14294 ~ 0%  TOTAL slabinfo.btrfs_extent_buffer.active_objs

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     16.24 ~ 2%     +12.0%      18.18 ~ 2%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     16.24 ~ 2%     +12.0%      18.18 ~ 2%  TOTAL turbostat.%c6

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      1575 ~ 2%      +9.9%       1732 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
      1575 ~ 2%      +9.9%       1732 ~ 1%  TOTAL proc-vmstat.nr_dirty

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    261613 ~ 0%      +8.9%     284781 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
   1793113 ~ 1%     +39.0%    2493055 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
   2054726 ~ 1%     +35.2%    2777837 ~ 0%  TOTAL time.voluntary_context_switches

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     11.25 ~ 2%     +18.1%      13.28 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     11.25 ~ 2%     +18.1%      13.28 ~ 1%  TOTAL iostat.sdb.avgqu-sz

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
    183744 ~ 1%     -15.6%     155153 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    183744 ~ 1%     -15.6%     155153 ~ 0%  TOTAL time.involuntary_context_switches

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
       529 ~ 0%     -15.6%        446 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
       529 ~ 0%     -15.6%        446 ~ 0%  TOTAL iostat.sdb.w/s

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      8009 ~ 1%     +15.2%       9225 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
     29796 ~ 2%     +20.7%      35971 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     37805 ~ 2%     +19.6%      45196 ~ 0%  TOTAL vmstat.system.cs

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      9275 ~ 1%      +6.3%       9861 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
      6245 ~ 7%     +23.5%       7716 ~ 2%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     15521 ~ 3%     +13.3%      17577 ~ 1%  TOTAL vmstat.io.bo

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      9277 ~ 1%      +5.8%       9815 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
      6248 ~ 7%     +23.5%       7718 ~ 2%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
     15525 ~ 3%     +12.9%      17534 ~ 1%  TOTAL iostat.sdb.wkB/s

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      1.12 ~ 1%      -9.5%       1.01 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
      1.12 ~ 1%      -9.5%       1.01 ~ 1%  TOTAL iostat.sdb.rrqm/s

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
   1448553 ~ 3%     +13.2%    1639185 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
   1448553 ~ 3%     +13.2%    1639185 ~ 1%  TOTAL time.file_system_outputs

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     99.39 ~ 1%      +3.4%     102.76 ~ 2%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
    126.06 ~ 5%     +21.4%     153.02 ~ 2%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    225.45 ~ 3%     +13.5%     255.78 ~ 2%  TOTAL iostat.sdb.wrqm/s

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
     85.36 ~ 1%      -6.0%      80.24 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
     95.60 ~ 0%     +10.9%     106.03 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
    180.96 ~ 1%      +2.9%     186.27 ~ 0%  TOTAL time.elapsed_time

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      1774 ~ 0%      +8.7%       1928 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
      4833 ~ 1%      +4.2%       5038 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
      6607 ~ 1%      +5.4%       6967 ~ 0%  TOTAL vmstat.system.in

51b98effa4c673f  d5f375270aa55794f4a7196b5  
---------------  -------------------------  
      1.98 ~ 0%      +4.8%       2.08 ~ 1%  nhm4/fsmark/1x-32t-1HDD-btrfs-8K-400M-fsyncBeforeClose-16d-256f
      4.07 ~ 1%      +4.8%       4.27 ~ 0%  nhm4/fsmark/1x-32t-1HDD-btrfs-9B-400M-fsyncBeforeClose-16d-256f
      6.06 ~ 1%      +4.8%       6.35 ~ 0%  TOTAL turbostat.%c0


Legend:
	~XX%    - stddev percent
	[+-]XX% - change percent


                               fsmark.files_per_sec

  700 ++--------------------------------------------------------------------+
      O O  O O O O  O O O O  O O O O  O O O O  O O O O  O O                 |
  600 *+*..*.*.*.*..*.*.*.*..*.*.*    *.*.*.*..*.*.*.*..*.*.*.*..*.*.*.*..*.*
      |                          :    :                                     |
  500 ++                         :    :                                     |
      |                           :  :                                      |
  400 ++                          :  :                                      |
      |                           :  :                                      |
  300 ++                          :  :                                      |
      |                           : :                                       |
  200 ++                          : :                                       |
      |                            ::                                       |
  100 ++                           ::                                       |
      |                            :                                        |
    0 ++---------------------------*----------------------------------------+


	[*] 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,
Aaron

View attachment "reproduce" of type "text/plain" (1163 bytes)

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