From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262010AbULPT0u (ORCPT ); Thu, 16 Dec 2004 14:26:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262011AbULPT0t (ORCPT ); Thu, 16 Dec 2004 14:26:49 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:49602 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S262010AbULPTWu (ORCPT ); Thu, 16 Dec 2004 14:22:50 -0500 Date: Thu, 16 Dec 2004 14:30:44 -0200 From: Marcelo Tosatti To: Hans Reiser Cc: Steve French , cliff white , linux-kernel@vger.kernel.org Subject: Re: cifs large write performance improvements to Samba Message-ID: <20041216163044.GG9986@logos.cnet> References: <41BDC9CD.60504@austin.rr.com> <20041213092057.5bf773fb.cliffw@osdl.org> <41BDE0B4.6020003@austin.rr.com> <41BDE2CF.9060402@austin.rr.com> <20041216121151.GH8246@logos.cnet> <41C1DABF.2050004@namesys.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41C1DABF.2050004@namesys.com> User-Agent: Mutt/1.5.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 16, 2004 at 10:58:07AM -0800, Hans Reiser wrote: > Marcelo Tosatti wrote: > > > > >>I have not seen anyone > >>doing that on Linux in an automated fashion (e.g running iozone > >>automated every time a new 2.6.x.rc on a half a dozen of the fs - simply > >>to verify that things had not gotten drastically worse on a particular > >>fs due to a bug or sideffect of a global VFS change). > >> > >> > > > >Yes, we definately need that. > > > > > > > Andrew Morton is saying that iozone does things real apps don't do, that > is, it dirties mmap'd pages enough to swamp the machine. > > Do you guys agree or disagree with that? > > Reiser4 needs iozone optimization work which we haven't bothered with yet. I'm not really familiar with iozone's behaviour, sorry. Steve, Andrew? PS: Yep, another important part (to me at least) of all this automated performance testing effort is a detailed understanding of the tests being performed.