Date: Sun, 2 Dec 2001 05:18:54 -0800 From: David Greenman <dg@root.com> To: rsharpe@ns.aus.com Cc: Matthew Dillon <dillon@apollo.backplane.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: Patch #3 (TCP / Linux / Performance) Message-ID: <20011202051854.A7713@nexus.root.com> In-Reply-To: <3C0A3204.3010009@ns.aus.com>; from sharpe@ns.aus.com on Mon, Dec 03, 2001 at 12:22:04AM %2B1030 References: <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011128104629.A43642@walton.maths.tcd.ie> <5.1.0.14.1.20011130181236.00a80160@postamt1.charite.de> <200111302047.fAUKlT811090@apollo.backplane.com> <200111302130.fAULUU324648@apollo.backplane.com> <3C08CF9D.2030109@ns.aus.com> <200112012138.fB1LcG837063@apollo.backplane.com> <200112020810.fB28Arr77757@apollo.backplane.com> <3C0A3204.3010009@ns.aus.com>
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>Does the FreeBSD tcp stack do zero copy (page flip the data to >userspace)? In the localhost case, it seems like there are two copies >to/from userspace there. It has the ability to do it via sendfile() and a few other mechanisms, but not as a normal part of typical read()/write(). -DG David Greenman Co-founder, The FreeBSD Project - http://www.freebsd.org President, TeraSolutions, Inc. - http://www.terasolutions.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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