From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 8 Nov 2002 21:29:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 8 Nov 2002 21:29:57 -0500 Received: from packet.digeo.com ([12.110.80.53]:56736 "EHLO packet.digeo.com") by vger.kernel.org with ESMTP id ; Fri, 8 Nov 2002 21:29:56 -0500 Message-ID: <3DCC74B0.47A462A9@digeo.com> Date: Fri, 08 Nov 2002 18:36:32 -0800 From: Andrew Morton X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.5.46 i686) X-Accept-Language: en MIME-Version: 1.0 To: Con Kolivas , Jens Axboe CC: linux kernel mailing list , marcelo@conectiva.com.br, Andrea Arcangeli Subject: Re: [BENCHMARK] 2.4.{18,19{-ck9},20rc1{-aa1}} with contest References: <200211091300.32127.conman@kolivas.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 09 Nov 2002 02:36:32.0826 (UTC) FILETIME=[D0D601A0:01C28798] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Con Kolivas wrote: > > io_load: > Kernel [runs] Time CPU% Loads LCPU% Ratio > 2.4.18 [3] 474.1 15 36 10 6.64 > 2.4.19 [3] 492.6 14 38 10 6.90 > 2.4.19-ck9 [2] 140.6 49 5 5 1.97 > 2.4.20-rc1 [2] 1142.2 6 90 10 16.00 > 2.4.20-rc1aa1 [1] 1132.5 6 90 10 15.86 > 2.4.20-pre3 included some elevator changes. I assume they are the cause of this. Those changes have propagated into Alan's and Andrea's kernels. Hence they have significantly impacted the responsiveness of all mainstream 2.4 kernels under heavy writes. (The -ck patch includes rmap14b which includes the read-latency2 thing)