Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263638AbTFEBi6 (ORCPT ); Wed, 4 Jun 2003 21:38:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264015AbTFEBi6 (ORCPT ); Wed, 4 Jun 2003 21:38:58 -0400 Received: from pao-ex01.pao.digeo.com ([12.47.58.20]:46473 "EHLO pao-ex01.pao.digeo.com") by vger.kernel.org with ESMTP id S263638AbTFEBi5 (ORCPT ); Wed, 4 Jun 2003 21:38:57 -0400 Date: Wed, 4 Jun 2003 18:52:28 -0700 From: Andrew Morton To: Vladimir Saveliev Cc: linux-kernel@vger.kernel.org, reiserfs-dev@namesys.com Subject: Re: file write performance drop between 2.5.60 and 2.5.70 Message-Id: <20030604185228.5cfc6b02.akpm@digeo.com> In-Reply-To: <200306042017.53435.vs@namesys.com> References: <200306042017.53435.vs@namesys.com> X-Mailer: Sylpheed version 0.9.0pre1 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 05 Jun 2003 01:52:28.0052 (UTC) FILETIME=[1E598540:01C32B05] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 787 Lines: 28 Vladimir Saveliev wrote: > > Hi > > It looks like file write performance dropped somewhere between 2.5.60 and > 2.5.70. > Doing > time dd if=/dev/zero of=file bs=4096 count=60000 > > on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM > I get for ext2 > 2.5.60: real 1.42 sys 0.77 > 2.5.70: real 1.73 sys 1.23 > for reiserfs > 2.5.60: real 1.62 sys 1.56 > 2.5.70: real 1.90 sys 1.86 > > Any ideas of what could cause this drop? > hm, 2.5.60 was a long time ago. The best way to tell would be comparative oprofiling. - 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/