Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 20 Mar 2001 13:41:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 20 Mar 2001 13:41:13 -0500 Received: from adsl-63-195-162-81.dsl.snfc21.pacbell.net ([63.195.162.81]:14603 "EHLO master.linux-ide.org") by vger.kernel.org with ESMTP id ; Tue, 20 Mar 2001 13:40:58 -0500 Date: Tue, 20 Mar 2001 10:39:28 -0800 (PST) From: Andre Hedrick To: William Park cc: linux-kernel Subject: Re: VIA686B + 2.2.18 (was: VIA686A chipset crash under 2.4.2-ac20) In-Reply-To: <20010316145030.A7907@better.net> Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 16 Mar 2001, William Park wrote: > I'm running 2.2.18 on VIA686B (ABit VP6). Some time ago, you mentioned > that you got ~80Mb/s from 'hdparm -t /dev/hda'. Please tell us how? > Which hdparm/kernel options did you enable? Nope not w/ 'hdparm' with DiskPerf and correcting for CR3's on memcpy's. [root@via DiskPerf-1.0.3]# ./DiskPerf /dev/hda Device: IBM-DTLA-307030 Serial Number: YKDYKM37674 LBA 0 DMA Read Test = 56.62 MB/Sec (4.42 Seconds) Outer Diameter Sequential DMA Read Test = 35.46 MB/Sec (7.05 Seconds) Inner Diameter Sequential DMA Read Test = 17.72 MB/Sec (14.10 Seconds) When you adjust for memory delays (of 35-40%) then you get those number. and those numbers are valid inside for kernel-kernel access, not kernel-user-space. Cheers, Andre Hedrick Linux ATA Development - 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/