Date: Sat, 27 Sep 2008 13:33:55 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: grehan@freebsd.org Cc: freebsd-ppc@freebsd.org Subject: Re: Call for testers: Apple ATA DMA Message-ID: <48DE7C93.5050506@freebsd.org> In-Reply-To: <48DDAC14.9070604@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> <48DDAC14.9070604@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?48DE7C93.5050506>