From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263841AbUDONbh (ORCPT ); Thu, 15 Apr 2004 09:31:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263798AbUDONb0 (ORCPT ); Thu, 15 Apr 2004 09:31:26 -0400 Received: from smtp.rol.ru ([194.67.21.9]:42128 "EHLO smtp.rol.ru") by vger.kernel.org with ESMTP id S263719AbUDONbW (ORCPT ); Thu, 15 Apr 2004 09:31:22 -0400 From: Konstantin Sobolev To: Justin Cormack Subject: Re: poor sata performance on 2.6 Date: Thu, 15 Apr 2004 17:34:03 +0400 User-Agent: KMail/1.6.1 Cc: Ryan Geoffrey Bourgeois , Kernel mailing list , linux-ide@vger.kernel.org References: <200404150236.05894.kos@supportwizard.com> <200404151455.36307.kos@supportwizard.com> <1082030525.14389.70.camel@lotte.street-vision.com> In-Reply-To: <1082030525.14389.70.camel@lotte.street-vision.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit Message-Id: <200404151734.03786.kos@supportwizard.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 15 April 2004 16:02, Justin Cormack wrote: > Ah I see from your config you have himem_4G turned on. How much memory > do you have? Sii3112 appears (I dont actually have datasheets) to only > have 32 bit DMA support, and will use bounce buffers quite a lot of the > time if you turn on himem at all, reducing throughput substantially. Try > again with no himem support at all and see if it helps. I have 1.5 GB. I tried to disable highmem, now less than 1GB is visible, but there is no noticable difference in SATA performance: siimage: /dev/hde: setting fs readahead to 8129 setting 32-bit IO_support flag to 1 setting multcount to 16 multcount = 16 (on) IO_support = 1 (32-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 8128 (on) geometry = 16383/255/63, sectors = 145226112, start = 0 Timing buffer-cache reads: 1428 MB in 2.00 seconds = 713.75 MB/sec Timing buffered disk reads: 100 MB in 3.03 seconds = 32.99 MB/sec libata /dev/sda: setting fs readahead to 8192 readahead = 8192 (on) Timing buffered disk reads: 82 MB in 3.02 seconds = 27.17 MB/sec -- /KoS * Popularity is not the same as validity.