From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263494AbTJVTIM (ORCPT ); Wed, 22 Oct 2003 15:08:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263543AbTJVTIM (ORCPT ); Wed, 22 Oct 2003 15:08:12 -0400 Received: from fw.osdl.org ([65.172.181.6]:54664 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S263494AbTJVTIL (ORCPT ); Wed, 22 Oct 2003 15:08:11 -0400 Date: Wed, 22 Oct 2003 12:08:08 -0700 From: Dave Olien To: Nick Piggin Cc: rwhron@earthlink.net, venom@sns.it, linux-kernel@vger.kernel.org, akpm@osdl.org, Mary Edie Meredith Subject: Re: [BENCHMARK] I/O regression after 2.6.0-test5 Message-ID: <20031022190808.GA10311@osdl.org> References: <20031021130501.GA4409@rushmore> <3F9653E6.4060209@cyberone.com.au> <20031022183028.GA10249@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20031022183028.GA10249@osdl.org> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I don't know how useful this might but. I've been trying to track down which patches to as-iosched resulted in the performance drop. The results so far are a little confusing. I have been running reaim on an 8-way system, comparing as-iosched performance with deadline, on each kernel version. The numbers are "number of jobs per minute". So, larger is better. Deadline As-iosched 2.6.0-test5 8542 8589 2.6.0-test5-mm1 8303 8401 2.6.0-test5-mm2 8309 8224 2.6.0-test5-mm3 8222 8417 2.6.0-test6 8302 6934 **** 2.6.0-test6-mm1 8375 8163 2.6.0-test6-mm2 ??? 8309 I'm still getting data on test6-mm*. It's curious that performance dropped for test6, but came back for test6-mm1. On Wed, Oct 22, 2003 at 11:30:28AM -0700, Dave Olien wrote: > > Sorry, this patch didn't fix our performance problems. Mary just > finished running dbt2 on test8 with your patch: > > NOTPM kernel scheduler > 965 2.6.0-test8-np AS > 1632 2.6.-test6-mm4 deadline > > This is an 8-way system with DAC960 and 12 LUNs, using raw devices. > That's still quite a sizeable drop. >