Date: Wed, 29 Mar 2006 09:13:07 +0200
From: Jens Axboe <axboe@suse.de>
To: Douglas Gilbert <dougg@torque.net>
Cc: "Ju, Seokmann" <Seokmann.Ju@lsil.com>,
       "Ju, Seokmann" <Seokmann.Ju@engenio.com>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: I/O performance measurement tools on Linux
Message-ID: <20060329071306.GP8186@suse.de>
References: <890BF3111FB9484E9526987D912B261901BC88@NAMAIL3.ad.lsil.com> <4429F9F9.9000403@torque.net>
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On Tue, Mar 28 2006, Douglas Gilbert wrote:
> Ju, Seokmann wrote:
> > Hi,
> > 
> > Are there any performance measurement tools available that running on
> > Linux?
> > I would like to measure disk I/O performance (file system and raw I/O)
> > on several kernels.
> > Please lead me to the place.
> 
> The sg3_utils package may help with some raw SCSI
> and SATA disk I/O measurements.
> sg_dd, sgp_dd and sgm_dd are dd variants that
> let you tweak a lot of low level details. The sg_read
> utility can be used to measure disk cache throughput,
> transport speeds and command overhead.

I wrote a little fio tool that can be used as well, it can use various
types of io engines: libaio, posixaio, regular sync io, direct io, and
SG_IO io. You can write simple job files for it, there are some examples
included in the tar ball.

http://brick.kernel.dk/snaps/

Just grab the latest snapshot, that's usually the least buggy version
:-)

-- 
Jens Axboe

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