Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750978AbWKBOoO (ORCPT ); Thu, 2 Nov 2006 09:44:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750980AbWKBOoO (ORCPT ); Thu, 2 Nov 2006 09:44:14 -0500 Received: from brick.kernel.dk ([62.242.22.158]:43076 "EHLO kernel.dk") by vger.kernel.org with ESMTP id S1750954AbWKBOoN (ORCPT ); Thu, 2 Nov 2006 09:44:13 -0500 Date: Thu, 2 Nov 2006 15:46:04 +0100 From: Jens Axboe To: martin Cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [Patch 0/5] I/O statistics through request queues Message-ID: <20061102144603.GN13555@kernel.dk> References: <20061023113728.GM8251@kernel.dk> <453D05C3.7040104@de.ibm.com> <20061023200220.GB4281@kernel.dk> <453E38FE.1020306@de.ibm.com> <20061024162050.GK4281@kernel.dk> <453E9C18.70803@de.ibm.com> <20061025051238.GO4281@kernel.dk> <453F3D4E.4020608@de.ibm.com> <20061025104217.GB4281@kernel.dk> <1162478356.6902.144.camel@dix> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1162478356.6902.144.camel@dix> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 805 Lines: 19 On Thu, Nov 02 2006, martin wrote: > Jens, Andrew, > I am not pursueing this patch set. I have convinced myself that blktrace > is capable of being used as a an analysis tool for low level I/O > performance, if invoced with appropriate settings. In our tests, we > limited traces to Issue/Complete events, cut down on relay buffers, and > redirected traces to a network connection instead of filling locally > attached storage up. Cost is about 2 percent, as advertised. Martin, thanks for following up on this and verifying the cost numbers. -- Jens Axboe - 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/