From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 14 Apr 2002 19:20:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 14 Apr 2002 19:20:21 -0400 Received: from conx.aracnet.com ([216.99.200.135]:50933 "HELO cj90.in.cjcj.com") by vger.kernel.org with SMTP id ; Sun, 14 Apr 2002 19:20:20 -0400 Message-ID: <3CBA0EAD.205@cjcj.com> Date: Sun, 14 Apr 2002 16:20:13 -0700 From: CJ User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.4) Gecko/20011128 Netscape6/6.2.1 X-Accept-Language: en-us MIME-Version: 1.0 To: Linux Kernel Development Subject: IDE performance 2.4.18 slower than MSDOS Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org These are for an unmounted Seagate 80GB IDE Primary ST380021A DMA in a Celeron 466, Intel 815BN, 256MB. dd 4.0.36 linux-2.4.18-------- MB/s Input Output Hdparm DOS 42.10 ? -Tt /dev/hda 36.36 19.94 37.21 /dev/raw 2.86 3.28 98.46 Linux 2.4.18 time dd if=/dev/hda of=/dev/nul 301.6user 1093system 36:41.05elapsed 63%cpu 36.36MB/s time dd if=/dev/raw/raw80 of=/dev/nul 690.95user 5060.35system 7:31:39elapsed 21%cpu (IDE light dim) 2.86MB/s time dd if=/dev/zero of=/dev/raw/raw80 626.32user 7570.34system 6:46:39elapsed 33%cpu (IDE light dim) 3.28MB/s time dd if=/dev/zero of=/dev/hda 304.34user 1413system 1:06:54elapsed 42%cpu (IDE light medium 123456, IDE light off 789)repeats throughtout 19.94MB/s