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Date:	Mon, 24 Nov 2014 10:51:41 +0800
From:	Yuanhan Liu <yuanhan.liu@...ux.intel.com>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org,
	Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Subject: [LKP] [x86, irq, ACPI] 5fcb864ef90: -3.3%(vm-scalability.throughput)
   +12.9%(turbostat.%c0)


Hi,

We noticed the below changes on(NOTE: I'm not sure the bisect is correct
or not, here I report it out JFYI).

git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 5fcb864ef90df093d964171539c87ffa0ab49f0f ("x86, irq, ACPI: Implement interfaces to support ACPI based IOAPIC hot-removal")


testbox/testcase/testparams: lkp-nex06/vm-scalability/performance-300s-small-allocs-mt

ff6213974cd90e1e  5fcb864ef90df093d964171539  
----------------  --------------------------  
       fail:runs  %reproduction    fail:runs
           |             |             |    
           :5           20%           1:5     kmsg.CE:hpet_increased_min_delta_ns_to#nsec
         %stddev     %change         %stddev
             \          |                \  
    315326 ±  0%      -3.3%     304841 ±  0%  vm-scalability.throughput
     11.82 ±  0%     +12.9%      13.34 ±  0%  turbostat.%c0
      1.34 ±  0%      +9.4%       1.46 ±  0%  turbostat.GHz
        12 ± 47%     +78.7%         21 ± 32%  sched_debug.cfs_rq[29]:/.load
       113 ± 26%     +86.3%        212 ± 28%  sched_debug.cfs_rq[39]:/.tg_load_contrib
       106 ± 28%     +89.5%        202 ± 30%  sched_debug.cfs_rq[39]:/.blocked_load_avg
        66 ± 23%    +120.6%        145 ± 29%  sched_debug.cfs_rq[40]:/.blocked_load_avg
        70 ± 23%    +113.0%        150 ± 29%  sched_debug.cfs_rq[40]:/.tg_load_contrib
     10145 ± 23%     -38.3%       6255 ± 35%  numa-meminfo.node1.AnonPages
      2535 ± 23%     -38.3%       1564 ± 35%  numa-vmstat.node1.nr_anon_pages
       605 ± 16%     -22.0%        471 ±  5%  sched_debug.cpu#58.nr_uninterruptible
     58904 ±  7%     -13.8%      50762 ±  7%  sched_debug.cfs_rq[0]:/.min_vruntime
    481299 ±  8%     -13.4%     416975 ±  7%  sched_debug.cpu#0.sched_count
    409009 ± 11%     -15.7%     344638 ±  2%  sched_debug.cpu#4.sched_count
     52022 ± 10%     -16.1%      43623 ±  2%  sched_debug.cfs_rq[4]:/.min_vruntime
        68 ±  3%     -12.2%         60 ±  3%  sched_debug.cfs_rq[4]:/.tg_runnable_contrib
      3175 ±  3%     -12.1%       2791 ±  3%  sched_debug.cfs_rq[4]:/.avg->runnable_avg_sum
     50060 ±  6%     -12.3%      43914 ±  4%  sched_debug.cfs_rq[29]:/.min_vruntime
      1751 ± 12%     -15.5%       1480 ±  6%  sched_debug.cpu#63.nr_uninterruptible
      2967 ±  6%     -13.7%       2562 ±  4%  sched_debug.cfs_rq[37]:/.avg->runnable_avg_sum
        63 ±  6%     -13.8%         55 ±  4%  sched_debug.cfs_rq[37]:/.tg_runnable_contrib
      1.07 ±  2%     -10.9%       0.95 ±  3%  perf-profile.cpu-cycles.tick_nohz_restart.tick_nohz_idle_exit.cpu_startup_entry.start_secondary
      1.64 ±  2%      -8.4%       1.50 ±  4%  perf-profile.cpu-cycles.__tick_nohz_idle_enter.tick_nohz_idle_enter.cpu_startup_entry.start_secondary
     35173 ±  5%      -9.1%      31983 ±  3%  sched_debug.cfs_rq[56]:/.min_vruntime
      1.41 ±  2%      -8.3%       1.29 ±  4%  perf-profile.cpu-cycles.tick_nohz_stop_sched_tick.__tick_nohz_idle_enter.tick_nohz_idle_enter.cpu_startup_entry.start_secondary
      1.63 ±  1%      -9.3%       1.48 ±  3%  perf-profile.cpu-cycles.tick_nohz_idle_exit.cpu_startup_entry.start_secondary
     45161 ± 11%     -12.8%      39358 ±  4%  sched_debug.cfs_rq[25]:/.min_vruntime
     39201 ±  5%     +17.3%      45969 ± 18%  sched_debug.cfs_rq[8]:/.min_vruntime
  21071502 ±  0%      -3.3%   20379730 ±  0%  time.minor_page_faults
       299 ±  0%      -3.1%        290 ±  0%  time.user_time
  21763267 ±  0%      -3.3%   21055329 ±  0%  time.voluntary_context_switches
    142199 ±  0%      -3.1%     137732 ±  0%  vmstat.system.cs
       737 ±  0%      -2.1%        721 ±  1%  time.system_time
       341 ±  0%      -2.5%        333 ±  0%  time.percent_of_cpu_this_job_got

lkp-nex06: Nehalem-EX
Memory: 64G




                                   turbostat.%c0

    14 ++-------------------------------------------------------------------+
       |                                                    O               |
       |                      O  O   O  O  O                                |
  13.5 O+           O                         O   O  O  O         O  O      |
       |  O   O        O                                       O         O  |
       |         O         O                                                O
    13 ++                                                                   |
       |                                                                    |
  12.5 ++                                                                   |
       |                                                                    |
       |                                                                    |
    12 *+.*...*..     .*...                                                 |
       |         *..*.     *..  .*...*..*..*..*...  .*..*                   |
       |                      *.                  *.                        |
  11.5 ++-------------------------------------------------------------------+


                                   turbostat.GHz

  1.48 ++-------------------------------------------------------------------+
       O            O  O      O  O   O  O  O  O   O         O     O         |
  1.46 ++ O   O  O         O                         O  O      O     O   O  O
  1.44 ++                                                                   |
       |                                                                    |
  1.42 ++                                                                   |
       |                                                                    |
   1.4 ++                                                                   |
       |                                                                    |
  1.38 ++                                                                   |
  1.36 ++                                                                   |
       |                                                                    |
  1.34 ++             .*...*..            .*..*...  .*..                    |
       *..*...*..*..*.        *..*...*..*.        *.    *                   |
  1.32 ++-------------------------------------------------------------------+

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

To reproduce:

	apt-get install ruby ruby-oj
	git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
	cd lkp-tests
	bin/setup-local job.yaml # the job file attached in this email
	bin/run-local   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.

	--yliu

View attachment "job.yaml" of type "text/plain" (1611 bytes)

View attachment "reproduce" of type "text/plain" (5113 bytes)

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