From: Andreas Dilger Subject: Re: Performance of ext4 Date: Thu, 19 Jun 2008 00:58:44 -0600 Message-ID: <20080619065844.GQ3726@webber.adilger.int> References: <20080612131928.GB18229@mit.edu> <20080612180605.GD22481@skywalker> <20080616175408.GF3279@atrey.karlin.mff.cuni.cz> <20080616181353.GA20686@skywalker> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Cc: "Aneesh Kumar K.V" , Jan Kara , Theodore Tso , Solofo.Ramangalahy@bull.net, Nick Dokos , linux-ext4@vger.kernel.org, linux-kernel To: Holger Kiehl Return-path: Received: from sca-es-mail-1.Sun.COM ([192.18.43.132]:48282 "EHLO sca-es-mail-1.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752942AbYFSG6t (ORCPT ); Thu, 19 Jun 2008 02:58:49 -0400 In-reply-to: Content-disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: On Jun 18, 2008 05:58 +0000, Holger Kiehl wrote: > 1.03 ------Sequential Output------ --Sequential Input- --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- > ext4 K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP > 16G 52133 98 221378 95 106873 32 55707 99 297065 42 1546 4 > 16G 52042 98 220931 93 107715 32 55939 98 298810 42 1543 3 > 16G 52975 98 220976 93 108060 31 56426 98 298906 42 1452 4 > >ext4(patchqueue)16G 59727 98 252733 52 110177 25 55821 98 296739 42 1553 5 >> 16G 61047 99 239242 48 111664 25 55706 98 297151 42 1545 4 >> 16G 60503 99 241532 47 109655 25 55671 98 297648 42 1552 3 > > I forgot to mention that for bonnie ext4-patch-queue reduces CPU-load > a lot. For block writting it is nearly halved. That was the main reason for developing mballoc. With this patch it would be able to drive almost 500MB/s write, 600MB/s read on the above system instead of being CPU limited at 250/300MB/s. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.