Re: 答复: [LKP] [sched/fair] 638476007d1: +1.1% unixbench.score

[Huang Ying <ying.huang@intel.com>]

On Wed, 2015-02-11 at 15:25 +0800, pang.xunlei@zte.com.cn wrote:
> Hello,
> 
> Does "+1.1% unixbench.score" mean better or worse?
> 
> Anyway, this is a load bug fix, does can affect the load balancing 
> behavior a little.

I think this means something better :)

Best Regards,
Huang, Ying

> Regards,
> Xunlei
> 
> 
> 
> Huang Ying <ying.huang@intel.com> 
> 2015-02-09 上午 11:27
> 
> 收件人
> Xunlei Pang <pang.xunlei@linaro.org>, 
> 抄送
> Ingo Molnar <mingo@kernel.org>, LKML <linux-kernel@vger.kernel.org>, LKP 
> ML <lkp@01.org>
> 主题
> [LKP] [sched/fair] 638476007d1: +1.1% unixbench.score
> 
> 
> 
> 
> 
> 
> FYI, we noticed the below changes on
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
> commit 638476007d13534b2ed4134bf0279ef44071140b ("sched/fair: Fix the 
> dealing with decay_count in __synchronize_entity_decay()")
> 
> It appears that your patch cause CPU usage increased a little, so that 
> unixbench score increased.
> 
> testbox/testcase/testparams: nhm-white/unixbench/spawn
> 
> 7f1a169b88f513e3  638476007d13534b2ed4134bf0 
> ----------------  -------------------------- 
>          %stddev     %change         %stddev
>              \          |                \ 
>     268908 ±  0%      +4.6%     281320 ±  0% 
> unixbench.time.involuntary_context_switches
>  1.147e+08 ±  0%      +1.5%  1.164e+08 ±  0% 
> unixbench.time.minor_page_faults
>       3607 ±  0%      +1.1%       3648 ±  0%  unixbench.score
>        324 ±  0%      +1.2%        328 ±  0% 
> unixbench.time.percent_of_cpu_this_job_got
>        633 ±  0%      +1.2%        641 ±  0%  unixbench.time.system_time
>      54100 ±  3%     +51.0%      81705 ± 21% 
> sched_debug.cpu#4.ttwu_local
>      65678 ±  7%     +49.5%      98187 ± 16% 
> sched_debug.cpu#6.ttwu_local
>       5624 ± 31%     +52.1%       8553 ± 11% sched_debug.cpu#6.curr->pid
>         58 ± 20%     +37.6%         80 ±  7% 
> sched_debug.cfs_rq[3]:/.runnable_load_avg
>         61 ± 10%     +22.5%         74 ± 14% 
> sched_debug.cpu#2.cpu_load[3]
>     218479 ±  5%     +15.4%     252190 ±  5% 
> sched_debug.cpu#6.ttwu_count
>        102 ± 17%     -19.3%         82 ± 10% 
> sched_debug.cpu#4.cpu_load[2]
>     423974 ±  4%     +15.6%     490072 ±  5%  sched_debug.cpu#5.avg_idle
>         62 ±  4%     +16.9%         72 ±  9% 
> sched_debug.cpu#2.cpu_load[4]
>     152298 ±  2%      +9.7%     167037 ±  3% 
> sched_debug.cfs_rq[5]:/.min_vruntime
>     156795 ±  1%     +11.3%     174544 ±  1% 
> sched_debug.cfs_rq[7]:/.min_vruntime
>     155535 ±  3%     +11.8%     173813 ±  2% 
> sched_debug.cfs_rq[6]:/.min_vruntime
>       9231 ±  0%      +1.3%       9348 ±  0%  vmstat.system.in
> 
> nhm-white: Nehalem
> Memory: 6G
> 
> 
>                             unixbench.time.system_time
> 
>   643 
> ++---------------------------------------------------------------O----+
>   642 ++                    O                                   O  O
>       O O  O O  O O O  O O    O  O   O  O O  O   O  O O    O  O   O O |
>   641 ++                           O           O         O           O  |
>   640 ++  |
>       |  |
>   639 ++  |
>   638 ++  |
>   637 ++  |
>       |  |
>   636 ++  |
>   635 ++         .*  |
>       *.*.. .*..*  +         .*.. .*.*..  *  |
>   634 ++   *        *..*.*..*    *       +  |
>   633 
> ++--------------------------------*-----------------------------------+
> 
> 
>                      unixbench.time.involuntary_context_switches
> 
>   286000 
> ++-----------------------------------------------------------------+
>   284000 ++                                                 O  |
>          |                                                    O    O  |
>   282000 ++                                                          O O  
> O
>   280000 O+O    O          O      O      O  O   O  O O    O     O O |
>          |    O      O O O           O O      O        O  |
>   278000 ++       O           O O  |
>   276000 ++  |
>   274000 ++  |
>          |  |
>   272000 ++  |
>   270000 ++  .*.*.              *.*..      .*  |
>          *.*.     *..*. .*     :     *.*.*.  |
>   268000 ++            *  +    :  |
>   266000 
> ++----------------*--*---------------------------------------------+
> 
> 
>                        kmsg.tsc:Fast_TSC_calibration_failed
> 
>     1 
> ++-------------------------------------O--------O---------------------+
>       |  |
>       |  |
>   0.8 ++  |
>       |  |
>       |  |
>   0.6 ++  |
>       |  |
>   0.4 ++  |
>       |  |
>       |  |
>   0.2 ++  |
>       |  |
>       |  |
>     0 
> O+O--O-O--O-O-O--O-O--O-O--O-O-O--O-O----O-O--O----O-O--O-O-O--O-O--O-O
> 
>         [*] 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.
> 
> 
> Thanks,
> Huang, Ying
> 
> 
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> 庞训磊10110855/user/zte_ltd 删除
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