From owner-freebsd-x11@FreeBSD.ORG Sun Feb 14 13:24:46 2010 Return-Path: Delivered-To: freebsd-x11@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 062C11065670 for ; Sun, 14 Feb 2010 13:24:46 +0000 (UTC) (envelope-from wilkinsa@dsto.defence.gov.au) Received: from digger1.defence.gov.au (digger1.defence.gov.au [203.5.217.4]) by mx1.freebsd.org (Postfix) with ESMTP id 59C038FC08 for ; Sun, 14 Feb 2010 13:24:44 +0000 (UTC) Received: from ednmsw520.dsto.defence.gov.au (ednmsw520.dsto.defence.gov.au [131.185.68.60]) by digger1.defence.gov.au (DSTO/DSTO) with ESMTP id o1EDLfDN024684 for ; Sun, 14 Feb 2010 23:51:41 +1030 (CST) Received: from ednex510.dsto.defence.gov.au (ednex510.dsto.defence.gov.au) by ednmsw520.dsto.defence.gov.au (Clearswift SMTPRS 5.3.2) with ESMTP id for ; Sun, 14 Feb 2010 23:54:43 +1030 Received: from stlex511.dsto.defence.gov.au ([203.6.60.49]) by ednex510.dsto.defence.gov.au with Microsoft SMTPSVC(6.0.3790.3959); Sun, 14 Feb 2010 23:54:42 +1030 Received: from stlux550.dsto.defence.gov.au ([203.6.60.61]) by stlex511.dsto.defence.gov.au with Microsoft SMTPSVC(6.0.3790.3959); Sun, 14 Feb 2010 21:24:42 +0800 Received: from stlux550.dsto.defence.gov.au (localhost [127.0.0.1]) by stlux550.dsto.defence.gov.au (8.14.3/8.14.3) with ESMTP id o1ED6oXX058225 for ; Sun, 14 Feb 2010 21:06:50 +0800 (WST) (envelope-from wilkinsa@stlux550.dsto.defence.gov.au) Received: (from wilkinsa@localhost) by stlux550.dsto.defence.gov.au (8.14.3/8.14.3/Submit) id o1ED6oGv058224 for freebsd-x11@freebsd.org; Sun, 14 Feb 2010 21:06:50 +0800 (WST) (envelope-from wilkinsa) Date: Sun, 14 Feb 2010 21:06:50 +0800 From: "Wilkinson, Alex" To: freebsd-x11@freebsd.org Message-ID: <20100214130650.GB57098@stlux503.dsto.defence.gov.au> Mail-Followup-To: freebsd-x11@freebsd.org References: <20100208172654.GA391@bunrab.catwhisker.org> <1265764746.8609.18.camel@balrog.2hip.net> <20100210023558.GV391@bunrab.catwhisker.org> <1265802517.8609.25.camel@balrog.2hip.net> <20100210130642.GA391@bunrab.catwhisker.org> <1265813805.8609.52.camel@balrog.2hip.net> <20100210150604.GC391@bunrab.catwhisker.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20100210150604.GC391@bunrab.catwhisker.org> Organisation: Defence Science Technology Organisation X-Message-Flag: "Please Restore Line Breaks If Necessary" User-Agent: Mutt/1.5.20 (2009-06-14) X-OriginalArrivalTime: 14 Feb 2010 13:24:42.0142 (UTC) FILETIME=[110133E0:01CAAD79] X-TM-AS-Product-Ver: SMEX-8.0.0.1285-6.000.1038-17192.007 X-TM-AS-Result: No--2.080700-0.000000-31 X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No Content-Transfer-Encoding: 7bit Subject: Re: DRI problems with ati/radeon on stable/7 r203425 [SEC=UNCLASSIFIED] X-BeenThere: freebsd-x11@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: X11 on FreeBSD -- maintaining and support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Feb 2010 13:24:46 -0000 0n Wed, Feb 10, 2010 at 07:06:04AM -0800, David Wolfskill wrote: >Well, I don't know what msi is, so I hadn't tried that. It stands for Message Signaled Interrupts, and it's a new way for PCI devices to generate interrupts. Instead of asserting a hardware signal on an interrupt line, the device does a write (using direct memory access) to a special address. The chipset sees the write and generates an interrupt to the CPU. The benefit ... Fewer dedicated signal lines on the motherboard == lower cost. Elimination of shared IRQs. Guaranteed ordering between DMA operations and the generation of the interrupt. -Alex IMPORTANT: This email remains the property of the Australian Defence Organisation and is subject to the jurisdiction of section 70 of the CRIMES ACT 1914. If you have received this email in error, you are requested to contact the sender and delete the email.