Date: Fri, 26 Sep 2008 20:44:20 -0700 From: Peter Grehan <grehan@freebsd.org> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: freebsd-ppc@freebsd.org Subject: Re: Call for testers: Apple ATA DMA Message-ID: <48DDAC14.9070604@freebsd.org> In-Reply-To: <48DD2DF7.2020901@freebsd.org> 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> <b9c23c9f0809240338g61e93beoba429ea319a9d56@mail.gmail.com> <48DA4037.9000508@freebsd.org> <b9c23c9f0809240632h77f091dawe54887d0a7f51c1d@mail.gmail.com> <48DBD6C0.5070005@freebsd.org> <b9c23c9f0809261048v366a3cc9i4db8a16cd4eda03@mail.gmail.com> <b9c23c9f0809261053j121ce31fpb62382ff30e6ef76@mail.gmail.com> <48DD2DF7.2020901@freebsd.org>
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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. later, Peter.
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