Date: Tue, 1 Aug 2006 09:37:18 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Robert Watson <rwatson@FreeBSD.org> Cc: arch@FreeBSD.org, net@FreeBSD.org Subject: Re: Changes in the network interface queueing handoff model Message-ID: <17615.22798.24602.160771@grasshopper.cs.duke.edu> In-Reply-To: <20060801142056.C64452@fledge.watson.org> References: <20060730141642.D16341@fledge.watson.org> <17615.19420.172545.986872@grasshopper.cs.duke.edu> <20060801142056.C64452@fledge.watson.org>
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Robert Watson writes: > > Jack Vogel at Intel has previously talked about having TSO patches for FreeBSD > to use with if_em, but was running into stability/correctness problems on 7.x. > I e-mailed him a few minutes ago to ask to take a look at the patches. Since > I've not yet seen them, I don't know the details of how they work -- I assume > that some amount of tweaking is required not just to TCP so that it passes > down larger segments, but so that larger segments are used in the right ways, > and in keeping with the facilities offered by the underlying interface, > especially before a routing decision has been made. I'm not sure about what stack changes are required for TSO. I do know that NetBSD has had TSO for roughly 2 years, so they might be a good place to look.. Drew
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