Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754396AbYKXXw7 (ORCPT ); Mon, 24 Nov 2008 18:52:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753783AbYKXXwu (ORCPT ); Mon, 24 Nov 2008 18:52:50 -0500 Received: from lucidpixels.com ([75.144.35.66]:47831 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753094AbYKXXwu (ORCPT ); Mon, 24 Nov 2008 18:52:50 -0500 Date: Mon, 24 Nov 2008 18:52:48 -0500 (EST) From: Justin Piszcz To: Stian Jordet cc: linux-kernel@vger.kernel.org, xfs@oss.sgi.com Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] In-Reply-To: <1227569808.5039.6.camel@chevrolet> Message-ID: References: <1226760254.5089.11.camel@chevrolet> <430c4fa50811180551r67d5d680tf1ffa493604ac4ea@mail.gmail.com> <1227476908.32357.5.camel@chevrolet> <1227485956.5145.10.camel@chevrolet> <1227569808.5039.6.camel@chevrolet> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1537 Lines: 51 On Tue, 25 Nov 2008, Stian Jordet wrote: > ma., 24.11.2008 kl. 04.50 -0500, skrev Justin Piszcz: >> While there still may be something else wrong, the first problem I see is >> your sunit and swidth are set to 0. >> >> Please read, a good article on what they are and how to set them: >> http://www.socalsysadmin.com/ > > Oh, this was new to me. But the setting didn't change anything. I can > copy one large file between the xfs and ext3 disk (both ways), and I get > speeds between 160 and 200 MB/s. But unpacking the kernel source takes > between 5 and 10 minutes on the xfs disk, and a mere 15 seconds on the > ext3... (and it also used to take between 5 and 10 minutes when I had > xfs on the raid0, so it doesn't seem to be hardware related...) > > If anyone has anything more I can try before I do the lengthy process of > backup 1TB, reformat and restore... > > Thanks :) > > Regards, > Stian > When you 'unpack the kernel source' ext3 will cache it etc, best way to test: /usr/bin/time cmd or time cmd where cmd is: bash -c 'tar xvf file.tar; sync' Make sure its a tar and not gzip/bzip2 (limited by CPU/etc) The other option is the relatime you stated, use this instead: defaults,noatime,logbufs=8,logbsize=262144 then tell me what you get (instead of relatime) Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/