From: Andreas Dilger Subject: Re: ext4 compile bench is slower Date: Fri, 25 Jul 2008 18:00:16 -0400 Message-ID: <20080725215901.GA3181@webber.adilger.int> References: <20080709165655.GB29109@skywalker> <20080709215728.GD6239@webber.adilger.int> <20080710042453.GA6764@skywalker> <20080714144442.GA1041@skywalker> <20080714100153.0f9756e3@ichigo> <20080721222357.56471dd5@gara> <20080723005850.GF19325@webber.adilger.int> <20080723083033.4bdddf08@gara> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Cc: Mingming Cao , "Aneesh Kumar K.V" , linux-ext4@vger.kernel.org To: "Jose R. Santos" Return-path: Received: from sca-es-mail-2.Sun.COM ([192.18.43.133]:36730 "EHLO sca-es-mail-2.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751670AbYGYWAi (ORCPT ); Fri, 25 Jul 2008 18:00:38 -0400 Received: from fe-sfbay-09.sun.com ([192.18.43.129]) by sca-es-mail-2.sun.com (8.13.7+Sun/8.12.9) with ESMTP id m6PM0P5r010485 for ; Fri, 25 Jul 2008 15:00:36 -0700 (PDT) Received: from conversion-daemon.fe-sfbay-09.sun.com by fe-sfbay-09.sun.com (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007)) id <0K4L00C0113B4N00@fe-sfbay-09.sun.com> (original mail from adilger@sun.com) for linux-ext4@vger.kernel.org; Fri, 25 Jul 2008 15:00:25 -0700 (PDT) In-reply-to: <20080723083033.4bdddf08@gara> Content-disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: On Jul 23, 2008 08:30 -0500, Jose R. Santos wrote: > On Tue, 22 Jul 2008 18:58:50 -0600 > Andreas Dilger wrote: > > Jose, do you have ext3 results on the same system > > for the benchmarks you ran? That would tell us how much improvement we > > get from other ext4 features (e.g. extents vs. block allocation) and how > > much from flex_bg. > > No I dont, I tried doing some runs yesterday but after updating the > kernel, the results flex_bg are about the same as without it and ext3 > is a lot faster than ext4. Im investigating to see if I messed up the > kernel build somehow or if we have a regression. There was another report that the current ext4 code is no longer faster at compilebench than ext3. > Valerie did a very comprehensive set of comparisons that could be > useful for the presentation. I'll try to see if I can recreate this > once I figure out the regression im seeing but would this work for now? > > http://www.bullopensource.org/ext4/20080530/ffsb-readwrite-2.6.26-rc2.html Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.