Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 12 Feb 2002 14:35:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 12 Feb 2002 14:35:12 -0500 Received: from mta02-svc.ntlworld.com ([62.253.162.42]:46830 "EHLO mta02-svc.ntlworld.com") by vger.kernel.org with ESMTP id ; Tue, 12 Feb 2002 14:34:57 -0500 Message-ID: <3C696FE4.83AAA1B9@ntlworld.com> Date: Tue, 12 Feb 2002 19:41:24 +0000 From: SA X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.4.7-10 i686) X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Re: Write-combining 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 Have I missed something here? Am I being dim? Or is the usual "instant advice" feature switched off? The device I am writing the driver for formally didn't support write-combining and it took 10000 clock ticks to do a partial transfer- now it does support write-combining and it still takes 10000 clock ticks to transfer the data- It is performance critical- How do I switch write-combining on? It is worth at least a 2x speed up for me? If it is something obvious please don't be afraid to point it out----- Thanks SA - 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/