From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.12.11.20060308/8.12.11/SuSE Linux 0.7) with ESMTP id mAP1adg3029276 for ; Mon, 24 Nov 2008 19:36:39 -0600 Received: from sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C346A15E3A66 for ; Mon, 24 Nov 2008 17:36:38 -0800 (PST) Received: from sandeen.net (sandeen.net [209.173.210.139]) by cuda.sgi.com with ESMTP id XzuAm0KSXGZEdXYt for ; Mon, 24 Nov 2008 17:36:38 -0800 (PST) Message-ID: <492B5684.2080107@sandeen.net> Date: Mon, 24 Nov 2008 19:36:04 -0600 From: Eric Sandeen MIME-Version: 1.0 Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] 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> In-Reply-To: <1227569808.5039.6.camel@chevrolet> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Stian Jordet Cc: xfs@oss.sgi.com, linux-kernel@vger.kernel.org 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... I don't know if the storage you're on passes barriers or not, but xfs has barriers on by default, while ext3 does not. ext3 will still likely win the "untar a kernel" race, but for a fairer test, make the barrier settings consistent between the two. -Eric _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs