From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Fengguang Wu <fengguang.wu@intel.com>
To: lkp@lists.01.org
Subject: Re: [clockevents] d5a085970b0: -9.2% will-it-scale.per_thread_ops
Date: Thu, 26 Jun 2014 12:39:21 +0800
Message-ID: <20140626043921.GC17188@localhost>
In-Reply-To: <CAKohpomKX69qLMgUBJpi1H-mxtkqSDCDn4J5V65+n03Lj1iOsQ@mail.gmail.com>
List-Id: <oe-lkp.lists.linux.dev>

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On Thu, Jun 26, 2014 at 09:35:11AM +0530, Viresh Kumar wrote:
> On 26 June 2014 07:16, Fengguang Wu <fengguang.wu@intel.com> wrote:
> > I'm not sure how the simple commit will impact will-it-scale/pwrite2
> > throughput. Just in case you can see more clues.
> >
> > git://git.linaro.org/people/vireshk/linux tick/ONESHOT-STOPPED
> > commit d5a085970b0b88b8c82303d2c45f09c9427fd02a ("clockevents: x86: add=
 support for ONESHOT_STOPPED mode")
> >
> > test case: nhm4/will-it-scale/pwrite2
> =

> What is this test all about ?

It calls the pwrite2() syscall in parallel, on one single tmpfs file.

https://github.com/antonblanchard/will-it-scale.git

Thanks,
Fengguang

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