From mboxrd@z Thu Jan 1 00:00:00 1970 From: Douglas Gilbert Subject: Re: I/O performance measurement tools on Linux Date: Tue, 28 Mar 2006 22:07:37 -0500 Message-ID: <4429F9F9.9000403@torque.net> References: <890BF3111FB9484E9526987D912B261901BC88@NAMAIL3.ad.lsil.com> Reply-To: dougg@torque.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from canuck.infradead.org ([205.233.218.70]:26247 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S1750700AbWC2DIR (ORCPT ); Tue, 28 Mar 2006 22:08:17 -0500 In-Reply-To: <890BF3111FB9484E9526987D912B261901BC88@NAMAIL3.ad.lsil.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "Ju, Seokmann" Cc: "Ju, Seokmann" , linux-kernel , linux-scsi 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