Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932199AbVL0Huh (ORCPT ); Tue, 27 Dec 2005 02:50:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932225AbVL0Hug (ORCPT ); Tue, 27 Dec 2005 02:50:36 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:14050 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S932199AbVL0Hug (ORCPT ); Tue, 27 Dec 2005 02:50:36 -0500 Subject: Re: ia_64_bit Performance difference From: Arjan van de Ven To: Nauman Tahir Cc: linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Date: Tue, 27 Dec 2005 08:50:31 +0100 Message-Id: <1135669831.2926.11.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: -2.8 (--) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (-2.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.8 ALL_TRUSTED Did not pass through any untrusted hosts X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 821 Lines: 18 On Tue, 2005-12-27 at 12:18 +0500, Nauman Tahir wrote: > Hi all, > I have written a block device driver. Driver includes the > implementation of write back cache policy. Purpose of the driver is > not an issue. The problem I am facing is the considerable difference > of performance when I run same driver on 32 and 64 BIT OS. I am > testing the driver on 64 Bit Machine and run the same driver on both > (32 and 64 Bit) OS. On 32 Bit, IO rate is almost double then on 64 Bit > OS. ( i wish it could have been opposite :( ) you forgot to post the URL to your source code... - 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/