linux-kernel - [uprobes/x86] 8ad8e9d3fd6: -7.5% aim7.2000.jobs-per-min, -45.7% turbostat.%c1

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Message-ID: <53743B03.7030404@intel.com>
Date:	Thu, 15 May 2014 11:56:51 +0800
From:	Jet Chen <jet.chen@...el.com>
To:	Oleg Nesterov <oleg@...hat.com>
CC:	Fengguang Wu <fengguang.wu@...el.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [uprobes/x86] 8ad8e9d3fd6: -7.5% aim7.2000.jobs-per-min, -45.7% turbostat.%c1

Hi Oleg,

we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 8ad8e9d3fd64f101eed6652964670672d699e563 ("uprobes/x86: Introduce uprobe_xol_ops and arch_uprobe->ops")

Test case: lkp-snb01/aim7/signal_test

34e7317d6ae8f61  8ad8e9d3fd64f101eed665296
---------------  -------------------------
    230689 ~ 0%      -7.5%     213485 ~ 0%  TOTAL aim7.2000.jobs-per-min
      0.51 ~30%     -45.7%       0.28 ~10%  TOTAL turbostat.%c1
       430 ~17%     +27.8%        549 ~15%  TOTAL vmstat.procs.r
      0.83 ~14%     +38.1%       1.15 ~12%  TOTAL perf-profile.cpu-cycles.copy_pte_range.copy_page_range.copy_process.do_fork.sys_clone
    106076 ~ 4%     +22.4%     129816 ~ 3%  TOTAL softirqs.RCU
     12117 ~ 6%      -9.9%      10914 ~ 6%  TOTAL slabinfo.kmalloc-256.active_objs
     32163 ~17%     +39.4%      44824 ~12%  TOTAL time.voluntary_context_switches
    276487 ~ 1%     +16.5%     322091 ~ 1%  TOTAL time.involuntary_context_switches
     83.14 ~ 0%     +13.3%      94.21 ~ 0%  TOTAL time.user_time
    108800 ~ 2%      +9.4%     119014 ~ 3%  TOTAL time.minor_page_faults
      1255 ~ 0%      +9.9%       1379 ~ 0%  TOTAL time.system_time
      6774 ~ 1%      +8.8%       7373 ~ 1%  TOTAL vmstat.system.cs
     52.15 ~ 0%      +8.0%      56.34 ~ 0%  TOTAL time.elapsed_time
     25185 ~ 0%      +2.4%      25784 ~ 0%  TOTAL vmstat.system.in
     79.23 ~ 0%      +2.0%      80.80 ~ 0%  TOTAL turbostat.%c0
      2567 ~ 0%      +1.9%       2615 ~ 0%  TOTAL time.percent_of_cpu_this_job_got
       112 ~ 0%      +1.3%        113 ~ 0%  TOTAL turbostat.Cor_W
       138 ~ 0%      +1.0%        139 ~ 0%  TOTAL turbostat.Pkg_W


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


Thanks,
Jet



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