Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 10 Dec 2001 00:27:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 10 Dec 2001 00:27:44 -0500 Received: from pcow028o.blueyonder.co.uk ([195.188.53.124]:5899 "EHLO blueyonder.co.uk") by vger.kernel.org with ESMTP id ; Mon, 10 Dec 2001 00:27:35 -0500 Date: Mon, 10 Dec 2001 04:48:49 +0000 From: Ian Molton To: linux-kernel@vger.kernel.org Subject: slow read performance... Message-Id: <20011210044849.538c84c6.spyro@armlinux.org> Reply-To: spyro@armlinux.org Organization: The dragon roost X-Mailer: Sylpheed version 0.6.5 (GTK+ 1.2.10; ) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi. I've just run bonnie (Im curious :) and got some disappointing figures. Im running a Duron @ 976MHz, on an ASUS A7M (76x northbridge, via 686B southbridge) the machine has 256MB RAM and a seagate ST320413A UDMA 100 harddisc as the only device on the primary ide interface. UDMA is /on/, and all in hdparm looks OK - 32 bit IO etc. write speed is fine (22-30MB/sec) but reads are horribly slow, as little as 9MB/sec and I havent seen >16MB/sec yet. I am using a 400MB test in bonnie to remove linuxs disc cache from the equation, as suggested by someone here. I thought HDDs were supposed to /read/ faster than they write? if 9MB/sec normal? seems low... I thought UDMA 100 discs were up around the 30MB/sec mark for reads... or does bonnie just report unrealistic read speeds? the machine 'feels' responsive enough... TIA... - 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/