From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758506AbZDDMqv (ORCPT ); Sat, 4 Apr 2009 08:46:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753291AbZDDMqn (ORCPT ); Sat, 4 Apr 2009 08:46:43 -0400 Received: from rtr.ca ([76.10.145.34]:33767 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752172AbZDDMqn (ORCPT ); Sat, 4 Apr 2009 08:46:43 -0400 Message-ID: <49D756B0.6030609@rtr.ca> Date: Sat, 04 Apr 2009 08:46:40 -0400 From: Mark Lord Organization: Real-Time Remedies Inc. User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: Jeff Garzik Cc: Linus Torvalds , Chris Mason , Andrew Morton , Jens Axboe , Linux Kernel Mailing List Subject: Re: Linux 2.6.29 References: <1238758370.32764.5.camel@think.oraclecorp.com> <49D66C0E.5090301@garzik.org> <49D68431.30703@garzik.org> <49D6A04B.2080104@garzik.org> In-Reply-To: <49D6A04B.2080104@garzik.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jeff Garzik wrote: > Linus Torvalds wrote: >> "fio" does well: >> >> http://git.kernel.dk/?p=fio.git;a=summary > > Neat tool, Jens... > > >> and I think it comes with a few example files. Here's the random write >> file that Jens suggested, and that works pretty well.. >> >> It first creates a 2GB file to do the IO on, then does random 4k >> writes to it with O_DIRECT. >> >> If your SSD does badly at it, you'll just want to kill it, but it >> shows you how many MB/s it's doing (or, in the sucky case, how many >> kB/s). > > > heh, so far, the SSD is poking along... > > Jobs: 1 (f=1): [w] [2.5% done] [ 0/ 282 kb/s] [eta 02h:24m:59s] .. Try turning on the drive write cache? hdparm -W1