Date: Thu, 15 Nov 2007 16:09:02 -0800 From: "Jack Vogel" <jfvogel@gmail.com> To: "Andre Oppermann" <andre@freebsd.org> Cc: freebsd-net@freebsd.org, freebsd-current@freebsd.org, "Wilkinson, Alex" <Alex.Wilkinson@dsto.defence.gov.au> Subject: Re: I/OAT ... Coming Soon ? Message-ID: <2a41acea0711151609i64f59719wcd893d0eb89f4cb0@mail.gmail.com> In-Reply-To: <473CDE7E.80008@freebsd.org> References: <1B860D81B4F3F44398B9AE84D91C151671D11B@stlex510.dsto.defence.gov.au> <2a41acea0711141712x533bcdbex92df05280311be8e@mail.gmail.com> <473CDE7E.80008@freebsd.org>
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On Nov 15, 2007 4:04 PM, Andre Oppermann <andre@freebsd.org> wrote: > Jack Vogel wrote: > > On Nov 14, 2007 5:01 PM, Wilkinson, Alex > > <Alex.Wilkinson@dsto.defence.gov.au> wrote: > >> Hi all, > >> > >> Curious, is I/OAT [http://www.intel.com/go/ioat/] coming to FreeBSD soon > >> ? > > > > LOL, I did a driver for the first version of I/OAT more than a year > > ago, submitted it and interest was half hearted. > > IMHO the biggest drawback (design failure) is the polling requirement > for the work queue. Ideally it would be structured like a NIC with > its DMA engine and rings. I know, at the time I did this Chris Leech the Linux developer was having trouble with an interrupt design, so I figured I'd not bang my head against the wall unnecessarily and follow what he was doing :) Since then however, work has been done and particularly with the CB2 support I believe Linux now does use interrupts, so if I go back and rework the driver I will try and follow that path. There is a goodly amount of work to do this justice, and I have been busy with new NIC hardware so much lately, but I hope to come up for air soon so I will try and get this off the queue :) Cheers, Jack > > The driver needs updating and polishing yet, but interest being what it was > > it hasn't been a real high priority.
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