From: Jens Axboe Subject: Re: [PATCH 0/4 v3] ext3/4: enhance fsync performance when using CFQ Date: Thu, 15 Apr 2010 16:03:49 +0200 Message-ID: <20100415140348.GB27497@kernel.dk> References: <1271279826-30294-1-git-send-email-jmoyer@redhat.com> <20100415103345.GY27497@kernel.dk> <20100415130854.GA27497@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, vgoyal@redhat.com To: Jeff Moyer Return-path: Received: from 0122700014.0.fullrate.dk ([95.166.99.235]:38709 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754318Ab0DOODu (ORCPT ); Thu, 15 Apr 2010 10:03:50 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu, Apr 15 2010, Jeff Moyer wrote: > Jens Axboe writes: > > >> > This is starting to look better. Can you share what tests you did? I > >> > tried reproducing with fs_mark last time and could not. > >> > >> Did you use the fs_mark command line I (think I) had posted? What > >> storage were you using? > > > > No, I didn't see any references to example command lines. I tested on a > > few single disks, rotating and SSD. I expected the single spinning disk > > to show the problem to some extent at least, but there was no difference > > observed with 64kb blocks. > > Boy, I'm really slipping. Try this one: > > ./fs_mark -S 1 -D 100 -N 1000 -d /mnt/test/fs_mark -s 65536 -t 1 -w 4096 Thanks Jeff, I'll give it a spin :-) -- Jens Axboe