[xfs] f876e446: +1.2% fileio.requests_per_sec

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Dave,

We noticed the below changes on commit f876e44603ad091c840a5fae5b0753bbb421c037
("xfs: always do log forces via the workqueue"):

Basically there are +1.2% increased throughput with +29.5% increased
context switches.

test box: NHM
test case: fileio rndwr-sync

      v3.14-rc1  f876e44603ad091c840a5fae5  
---------------  -------------------------  
       192 ~ 0%      +1.2%        194 ~ 0%  TOTAL fileio.requests_per_sec
         2 ~25%     +47.4%          4 ~ 0%  TOTAL time.percent_of_cpu_this_job_got
      1907 ~16%     +29.5%       2471 ~ 0%  TOTAL vmstat.system.cs
    331131 ~ 0%     +10.9%     367298 ~ 0%  TOTAL time.voluntary_context_switches
      3255 ~ 0%   +2330.6%      79126 ~ 0%  TOTAL time.involuntary_context_switches
   3703982 ~ 0%      +1.2%    3747974 ~ 0%  TOTAL time.file_system_outputs
     35.04 ~20%      +9.8%      38.48 ~ 0%  TOTAL iostat.sda.wrqm/s

                             time.voluntary_context_switches
 
    380000 ++----------------------------------------------------------------+
    360000 O+ O  O  O O  O  O  O  O  O  O  O O  O  O  O  O  O  O  O O  O  O  O
           |                                                                 |
    340000 *+.*..*..*.*..*..*..*..*..*..*..*    *..*..*..*..*..*..*.*        |
    320000 ++                              :    :                            |
           |                               :   :                             |
    300000 ++                               :  :                             |
    280000 ++                               :  :                             |
    260000 ++                               :  :                             |
           |                                : :                              |
    240000 ++                               : :                              |
    220000 ++                                ::                              |
           |                                 :                               |
    200000 ++                                *                               |
    180000 ++----------------------------------------------------------------+
 
 
                           time.involuntary_context_switches
 
    80000 ++------------------------O--O--O--O-----O--O--O--O-O--O--O--O--O--O
          O  O  O  O  O  O O  O  O              O                            |
    70000 ++                                                                 |
    60000 ++                                                                 |
          |                                                                  |
    50000 ++                                                                 |
          |                                                                  |
    40000 ++                                                                 |
          |                                                                  |
    30000 ++                                                                 |
    20000 ++                                                                 |
          |                                                                  |
    10000 ++                                                                 |
          *..*..*..*..*..*.*..*..*..*..*..*..*..*..*..*..*..*.*..*..*        |
        0 ++-----------------------------------------------------------------+
 
Thanks,
Fengguang
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux