From: Douglas Gilbert <dougg@torque.net>
To: "Ju, Seokmann" <Seokmann.Ju@lsil.com>
Cc: "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
Date: Tue, 28 Mar 2006 22:07:37 -0500 [thread overview]
Message-ID: <4429F9F9.9000403@torque.net> (raw)
In-Reply-To: <890BF3111FB9484E9526987D912B261901BC88@NAMAIL3.ad.lsil.com>
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.
Recently I have been looking at measuring command overhead.
On the disks that I am testing a zero block READ (i.e.
issue a SCSI READ for zero blocks) is the fastest command.
The most recent released sg3_utils can be found at:
http://www.torque.net/sg [Utilities section]
The latest beta is in the news section of that page.
A description can be found at:
http://www.torque.net/sg/u_index.html
Doug Gilbert
next prev parent reply other threads:[~2006-03-29 3:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-28 18:53 I/O performance measurement tools on Linux Ju, Seokmann
2006-03-29 3:07 ` Douglas Gilbert [this message]
2006-03-29 7:13 ` Jens Axboe
2006-03-30 6:54 ` Grant Grundler
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