From owner-freebsd-ppc@FreeBSD.ORG Sat Sep 27 18:29:33 2008 Return-Path: Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 27A531065698; Sat, 27 Sep 2008 18:29:33 +0000 (UTC) (envelope-from nwhitehorn@freebsd.org) Received: from agogare.doit.wisc.edu (agogare.doit.wisc.edu [144.92.197.211]) by mx1.freebsd.org (Postfix) with ESMTP id E89078FC12; Sat, 27 Sep 2008 18:29:32 +0000 (UTC) (envelope-from nwhitehorn@freebsd.org) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=ISO-8859-1; format=flowed Received: from avs-daemon.smtpauth2.wiscmail.wisc.edu by smtpauth2.wiscmail.wisc.edu (Sun Java(tm) System Messaging Server 6.3-6.03 (built Mar 14 2008; 32bit)) id <0K7V00E00A18Y100@smtpauth2.wiscmail.wisc.edu>; Sat, 27 Sep 2008 13:29:32 -0500 (CDT) Received: from trantor.tachypleus.net (adsl-76-204-100-161.dsl.mdsnwi.sbcglobal.net [76.204.100.161]) by smtpauth2.wiscmail.wisc.edu (Sun Java(tm) System Messaging Server 6.3-6.03 (built Mar 14 2008; 32bit)) with ESMTPSA id <0K7V00EENA173K00@smtpauth2.wiscmail.wisc.edu>; Sat, 27 Sep 2008 13:29:31 -0500 (CDT) Date: Sat, 27 Sep 2008 13:33:55 -0500 From: Nathan Whitehorn In-reply-to: <48DDAC14.9070604@freebsd.org> To: grehan@freebsd.org Message-id: <48DE7C93.5050506@freebsd.org> X-Spam-Report: AuthenticatedSender=yes, SenderIP=76.204.100.161 X-Spam-PmxInfo: Server=avs-14, Version=5.4.2.344556, Antispam-Engine: 2.6.0.325393, Antispam-Data: 2008.9.27.181405, SenderIP=76.204.100.161 References: <48D389EE.9000207@FreeBSD.org> <645CD2B8-11A0-42E8-B5F9-C04DCF21F763@mac.com> <48D84C12.7070207@freebsd.org> <0DD89065-9CF3-45E4-89A0-70D6BBB9621D@mac.com> <48D92D44.6080807@freebsd.org> <48DA4037.9000508@freebsd.org> <48DBD6C0.5070005@freebsd.org> <48DD2DF7.2020901@freebsd.org> <48DDAC14.9070604@freebsd.org> User-Agent: Thunderbird 2.0.0.16 (X11/20080814) Cc: freebsd-ppc@freebsd.org Subject: Re: Call for testers: Apple ATA DMA X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Sep 2008 18:29:33 -0000 Peter Grehan wrote: > Hi Nathan, > > > If I can get positive reports from a few more people who were >> having trouble, I'll drop this in the tree. > > The imac's ata-4 is working solidly at UDMA-66. The difference in CPU > usage and i/o with dd at 32k block size is stunning: 2MB/7% idle before, > 18MB/75% idle with your patch. I guess DMA is a useful technology :) Thanks for testing -- I've committed the patch. I'll revisit it when Marcel tests it on Monday and it erases his hard drive... -Nathan