From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 14 Nov 2000 09:49:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 14 Nov 2000 09:49:16 -0500 Received: from windsormachine.com ([206.48.122.28]:47109 "EHLO router.windsormachine.com") by vger.kernel.org with ESMTP id ; Tue, 14 Nov 2000 09:49:09 -0500 Message-ID: <3A1149CD.A2A1E4F4@windsormachine.com> Date: Tue, 14 Nov 2000 09:18:53 -0500 From: Mike Dresser Organization: Windsor Machine & Stamping X-Mailer: Mozilla 4.75 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: LA Walsh , linux-kernel@vger.kernel.org Subject: Re: IDE0 /dev/hda performance hit in 2217 on my HW In-Reply-To: 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 check if DMA mode is still on, on your hard drive. I'm trying to remember if that behaviour changed for 2.2.17 LA Walsh wrote: > I skimmed over the archives and didn't find a mention of this. I thought > I'd noticed this when I first installed 2217, but I was too busy to verify > it at the time. > > Simple case: > Under 2216, I can do a 'badblocks /dev/hda1 XXXXX'. Vmstat shows about > 10,000K/s average. This is consistent with 'dd' operations I use to copy > partitions for disk mirroring/backup. > > Under 2217, the xfer speed drops to near 1,000K/s. This is for both > 'badblocks' > and a 'dd' if=/dev/hda of=/dev/hdb bs=256k. In both instances, I notice > a near 90% performance degredation. > > Haven't tried any latest 2.2.18's -- has there been any work that might > have fixed this problem in 2218. Am I the only person who noticed this? > I.e. -- maybe it's something peculiar to my HW (Inspiron 7500), > IBM DARA-22.5G HD. > > -- > L A Walsh | Trust Technology, Core Linux, SGI > law@sgi.com | Voice/Vmail: (650) 933-5338 > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/