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Date:	Tue, 24 Nov 2015 13:32:11 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Marc Zyngier <marc.zyngier@....com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: [lkp] [genirq/msi] 460ec9d780: 8.5% unixbench.score

FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git irq/wire-msi-bridge
commit 460ec9d78057bf462f5b5cd0a140e32252d81405 ("genirq/msi: Make the .prepare callback reusable")


=========================================================================================
compiler/kconfig/rootfs/tbox_group/test/testcase:
  gcc-4.9/x86_64-rhel/debian-x86_64-2015-02-07.cgz/nhm-white2/context1/unixbench

commit: 
  c175e94e50249623f7e0c9dc087798afd2e541ae
  460ec9d78057bf462f5b5cd0a140e32252d81405

c175e94e50249623 460ec9d78057bf462f5b5cd0a1 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
      1421 ±  0%      +8.5%       1543 ±  0%  unixbench.score
  64569793 ±  0%      +7.0%   69093806 ±  0%  unixbench.time.voluntary_context_switches
  18591611 ±114%     -62.0%    7060772 ±104%  latency_stats.avg.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
     25939 ±  4%      -7.2%      24059 ±  5%  softirqs.SCHED
     10.80 ±  1%     +11.5%      12.04 ±  1%  time.user_time
      3971 ± 14%     -18.9%       3220 ±  5%  vmstat.system.in
     60.25 ± 20%     +28.6%      77.50 ± 15%  sched_debug.cfs_rq[0]:/.load_avg
     34.75 ±  6%     +50.4%      52.25 ± 23%  sched_debug.cfs_rq[0]:/.runnable_load_avg
     60.25 ± 20%     +28.6%      77.50 ± 15%  sched_debug.cfs_rq[0]:/.tg_load_avg_contrib
    440.00 ± 15%     +32.9%     584.75 ± 11%  sched_debug.cfs_rq[0]:/.util_avg
     32425 ±  4%     -15.2%      27496 ± 20%  sched_debug.cfs_rq[5]:/.exec_clock
     53.00 ± 16%     +72.6%      91.50 ± 21%  sched_debug.cfs_rq[5]:/.load_avg
     53.00 ± 16%     +73.1%      91.75 ± 21%  sched_debug.cfs_rq[5]:/.tg_load_avg_contrib
     80.25 ± 24%     +28.0%     102.75 ± 14%  sched_debug.cfs_rq[6]:/.load_avg
     37.00 ±  8%     +39.9%      51.75 ± 29%  sched_debug.cfs_rq[6]:/.runnable_load_avg
     80.25 ± 24%     +28.7%     103.25 ± 15%  sched_debug.cfs_rq[6]:/.tg_load_avg_contrib
     36.00 ±  3%     +27.1%      45.75 ± 14%  sched_debug.cpu#0.cpu_load[1]
     36.25 ±  4%     +22.8%      44.50 ±  8%  sched_debug.cpu#0.cpu_load[2]
     35.75 ±  7%     +24.5%      44.50 ±  9%  sched_debug.cpu#0.cpu_load[3]
     35.50 ±  9%     +28.9%      45.75 ± 12%  sched_debug.cpu#0.cpu_load[4]
   2030062 ±  4%     -16.0%    1705635 ±  5%  sched_debug.cpu#1.sched_goidle
     35.00 ± 11%     +14.3%      40.00 ±  5%  sched_debug.cpu#3.cpu_load[0]
     32.75 ± 23%     +25.2%      41.00 ±  4%  sched_debug.cpu#3.cpu_load[2]
     32.50 ± 24%     +29.2%      42.00 ±  6%  sched_debug.cpu#3.cpu_load[3]
     32.00 ± 26%     +34.4%      43.00 ± 10%  sched_debug.cpu#3.cpu_load[4]
     35.50 ± 13%     +18.3%      42.00 ±  5%  sched_debug.cpu#4.cpu_load[4]
     38729 ±  6%     -17.3%      32035 ± 20%  sched_debug.cpu#5.nr_load_updates
   1357857 ± 24%     -46.7%     724368 ± 35%  sched_debug.cpu#5.sched_goidle


nhm-white2: Nehalem
Memory: 4G



                                  unixbench.score

  1700 O+O--OO--------------------------------------------------------------+
       |  O                                                                 |
  1650 ++                                                                   |
       |                                                                    |
  1600 ++      OO                                                           |
       |          OO    O  O    OO O  OO O                                  |
  1550 ++                O  O O     O     O OO O                            |
       |             OO                                                     |
  1500 ++                                                                   |
       |                                                                    |
  1450 ++                                                                   |
       |                 *.**.*.**.**.                              *.**.**.*
  1400 *+**.**.**.**.**.*             **.**.**.**.**.*.**.**.**.**.*        |
       |                                                                    |
  1350 ++-------------------------------------------------------------------+


                       unixbench.time.voluntary_context_switches

  7.6e+07 O+--O-------------------------------------------------------------+
          |O O  O                                                           |
  7.4e+07 ++                                                                |
          |                                                                 |
  7.2e+07 ++       O                                                        |
          |      O                  O     O                                 |
    7e+07 ++        O O   O OO OOO O  OO O  O                               |
          |            O O                   O OO                           |
  6.8e+07 ++                                                                |
          |                                                                 |
  6.6e+07 ++                      .*                                        |
          |                 **.***  *.*                              * .**.*|
  6.4e+07 **. *.* .**.* .* +           *.* .**. *.**. **. *.* .**.* + *     *
          |  *   *     *  *               *    *     *   *   *     *        |
  6.2e+07 ++----------------------------------------------------------------+

	[*] bisect-good sample
	[O] bisect-bad  sample

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


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

View attachment "job.yaml" of type "text/plain" (3173 bytes)

Download attachment "reproduce.sh" of type "application/x-sh" (35 bytes)

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