Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753722AbYKYKqU (ORCPT ); Tue, 25 Nov 2008 05:46:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752509AbYKYKqF (ORCPT ); Tue, 25 Nov 2008 05:46:05 -0500 Received: from lucidpixels.com ([75.144.35.66]:57722 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752302AbYKYKqD (ORCPT ); Tue, 25 Nov 2008 05:46:03 -0500 Date: Tue, 25 Nov 2008 05:46:01 -0500 (EST) From: Justin Piszcz To: Christoph Hellwig cc: Eric Sandeen , Stian Jordet , Alan Piszcz , linux-kernel@vger.kernel.org, xfs@oss.sgi.com Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] In-Reply-To: <20081125104415.GA17304@infradead.org> 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> <492B5684.2080107@sandeen.net> <20081125104415.GA17304@infradead.org> 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: 1224 Lines: 44 On Tue, 25 Nov 2008, Christoph Hellwig wrote: > On Tue, Nov 25, 2008 at 04:56:24AM -0500, Justin Piszcz wrote: >> barriers enabled: >> >> $ time bash -c 'tar xf linux-2.6.27.7.tar; sync' >> block 573932: ** Block of NULs ** >> Total bytes read: 293857280 (281MiB, 1.9MiB/s) >> >> real 2m40.643s >> user 0m0.194s >> sys 0m1.541s >> >> barriers disabled: >> >> time bash -c 'tar xf linux-2.6.27.7.tar; sync' >> block 573932: ** Block of NULs ** >> Total bytes read: 293857280 (281MiB, 11MiB/s) >> >> real 0m27.612s >> user 0m0.182s >> sys 0m1.617s > > That's worse than usual, and even the no-barriers numbers are still > really bad. What kind of disk and controller is this? Did you > try to disable the cache with hdparm and see what that gives? > WD 750G on ICH7 Device Model: WDC WD7500AAKS-00RBA0 00:1f.2 SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) SATA AHCI Controller (rev 01) I've not tried playing with the cache. 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/