From owner-freebsd-ppc@FreeBSD.ORG Mon Sep 29 21:52:04 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 43A9A1065698; Mon, 29 Sep 2008 21:52:04 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from asmtpout015.mac.com (asmtpout015.mac.com [17.148.16.90]) by mx1.freebsd.org (Postfix) with ESMTP id 26E028FC38; Mon, 29 Sep 2008 21:52:04 +0000 (UTC) (envelope-from xcllnt@mac.com) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Received: from macbook-pro.jnpr.net (natint3.juniper.net [66.129.224.36]) by asmtp015.mac.com (Sun Java(tm) System Messaging Server 6.3-7.03 (built Aug 7 2008; 32bit)) with ESMTPSA id <0K7Z000C38QRC3W4@asmtp015.mac.com>; Mon, 29 Sep 2008 14:52:04 -0700 (PDT) Message-id: <0D5AE023-0D54-43BA-A325-0E1BEEC39D28@mac.com> From: Marcel Moolenaar To: Nathan Whitehorn In-reply-to: <48DE7C93.5050506@freebsd.org> Date: Mon, 29 Sep 2008 14:52:03 -0700 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> <48DE7C93.5050506@freebsd.org> X-Mailer: Apple Mail (2.929.2) Cc: grehan@freebsd.org, 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: Mon, 29 Sep 2008 21:52:04 -0000 On Sep 27, 2008, at 11:33 AM, Nathan Whitehorn wrote: > 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... Good and bad news. The good: my Xserve is working fine and acd0 is now using UDMA33 instead of BIOSPIO. The bad: my Mac Mini G4 is still having the same problems. This is ad0 at UDMA66 and acd0 at UDMA33. I'll experiment with it a bit later... -- Marcel Moolenaar xcllnt@mac.com