From: Maarten Lankhorst <maarten.lankhorst@canonical.com>
To: Fengguang Wu <fengguang.wu@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>, lkp@01.org
Subject: Re: [x86] 339a3922f6: +4.3% aim7 jobs-per-min
Date: Thu, 20 Feb 2014 14:13:20 +0100 [thread overview]
Message-ID: <5305FF70.2030406@canonical.com> (raw)
In-Reply-To: <20140220130646.GA22815@localhost>
op 20-02-14 14:06, Fengguang Wu schreef:
> Hi Maarten,
>
> We are glad to find that your commit 339a3922f68dcb7d93001f07b7e914d5cf6c066d
> ("decrease useless padding") increased aim disk_src performance by 4.3%:
>
> 74833276be6802b 339a3922f68dcb7d93001f07b
> --------------- -------------------------
> 511685 ~ 0% +4.3% 533571 ~ 0% TOTAL aim7.2000.jobs-per-min
> 77.30 ~ 0% -9.9% 69.66 ~ 0% TOTAL time.system_time
> 1.95 ~ 2% +7.0% 2.09 ~ 2% TOTAL iostat.sda.rrqm/s
> 23.57 ~ 0% -4.1% 22.60 ~ 0% TOTAL time.elapsed_time
> 425 ~ 0% -3.1% 412 ~ 0% TOTAL time.percent_of_cpu_this_job_got
> 7.59 ~ 0% -2.9% 7.37 ~ 0% TOTAL boottime.dhcp
> 15.24 ~ 0% -1.9% 14.94 ~ 0% TOTAL boottime.boot
>
Really? I just did it to get rid of the 15-byte nop sequences with tons of prefixes.
Interesting..
~Maarten
prev parent reply other threads:[~2014-02-20 13:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-20 13:06 [x86] 339a3922f6: +4.3% aim7 jobs-per-min Fengguang Wu
2014-02-20 13:13 ` Maarten Lankhorst [this message]
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