Date: Fri, 23 Jul 1999 11:43:44 -0600 From: "Justin T. Gibbs" <gibbs@caspian.plutotech.com> To: Mike Smith <mike@smith.net.au> Cc: "Justin T. Gibbs" <gibbs@plutotech.com>, cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Subject: Re: cvs commit: src/release/sysinstall tcpip.c Message-ID: <199907231743.LAA12993@caspian.plutotech.com> In-Reply-To: Your message of "Fri, 23 Jul 1999 10:36:08 PDT." <199907231736.KAA03557@dingo.cdrom.com>
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>> In zero copy applications, the header and the payload are usually placed >> in separate areas. > >Can you elaborate on this a little? We don't support the two being in >a separate allocation unit at the moment, yet I understood the 'fast >forwarding' code was essentially a zero-copy operation. I have not looked at the code Drew Gallatin used for his myrinet work, but here at Pluto, we plan to ship the header information into CPU memory and the payload to another PCI device's memory. I would expect a similar approach to be used for page flipping packet payloads into user space in more conventional zero-copy applications. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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