Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 24 Jan 2002 22:20:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 24 Jan 2002 22:20:18 -0500 Received: from pintail.mail.pas.earthlink.net ([207.217.120.122]:19107 "EHLO pintail.mail.pas.earthlink.net") by vger.kernel.org with ESMTP id ; Thu, 24 Jan 2002 22:20:05 -0500 Date: Thu, 24 Jan 2002 22:23:57 -0500 To: Rik van Riel Cc: linux-kernel@vger.kernel.org Subject: Re: 2.4.18pre4aa1 Message-ID: <20020124222357.C901@earthlink.net> In-Reply-To: <20020124191927.A809@earthlink.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from riel@conectiva.com.br on Thu, Jan 24, 2002 at 10:29:53PM -0200 From: rwhron@earthlink.net Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > [snip results: -aa twice as fast as -rmap for dbench, > -rmap twice as fast as -aa for tiobench] Look closely at all the numbers: dbench 64 128 192 on ext completed in 4500 seconds on 2.4.18pre4aa1 dbench 64 128 192 on ext completed in 12471 seconds on 2.4.17rmap12a 2.4.18pre4aa1 completed the three dbenches 277% faster. For tiobench: Tiobench is interesting because it has the CPU% column. I mentioned sequential reads because it's a bench where 2.4.17rmap12a was faster. Someone else might say 2.4.18pre4aa1 was 271% faster at random reads. Let's analyze CPU efficiency where threads = 1: Num Seq Read Rand Read Seq Write Rand Write Thr Rate (CPU%) Rate (CPU%) Rate (CPU%) Rate (CPU%) --- ------------- ----------- ------------- ----------- 2.4.17rmap12a 1 22.85 32.2% 1.15 2.2% 13.10 83.5% 0.71 1.6% 2.4.18pre4aa1 1 11.23 21.3% 3.12 4.8% 11.92 66.1% 0.66 1.3% Sequential Read CPU Efficiency 2.4.18pre4aa1 11.23 / .213 = 52.723 2.4.17rmap12a 22.85 / .322 = 70.962 2.4.17rmap12a was 35% more CPU efficent. Random Read CPU Efficiency 2.4.18pre4aa1 3.12 / .048 = 65.000 2.4.17rmap12a 1.15 / .022 = 52.272 2.4.18pre4aa1 was 24% more CPU efficient. Sequential Write CPU Efficiency 2.4.18pre4aa1 11.92 / .661 = 18.033 2.4.17rmap12a 13.10 / .835 = 15.688 2.4.18pre4aa1 was 15% more CPU efficient. Random Write CPU Efficiency 2.4.18pre4aa1 .066 / .013 = 50.767 2.4.17rmap12a .071 / .016 = 44.375 2.4.18pre4aa1 was 14% more CPU efficient. > It would be interesting to see the dbench dots from both > -aa and -rmap ;) All the dots are at: http://home.earthlink.net/~rwhron/kernel/dots/ -- Randy Hron - 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/