Date: Thu, 02 Dec 1999 18:09:56 -0700 From: Wes Peters <wes@softweyr.com> To: Archie Cobbs <archie@whistle.com> Cc: "Justin T. Gibbs" <gibbs@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern uipc_mbuf.c src/sys/sys mbuf.h Message-ID: <38471864.7CFA54BF@softweyr.com> References: <199912012327.PAA45003@bubba.whistle.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Archie Cobbs wrote:
>
> Justin T. Gibbs writes:
> >
> > How does this work in a 0 copy system?
>
> Not sure what a '0 copy system' is..
One that doesn't copy anything, ala the Wind River "zbuf" interface.
> Basically all it does is create a completely new mbuf chain containing
> the same data as the original. Definitely at least 1 copy :-)
Which sucks. Wasting time copying stuff around in memory is a great way
to make your network stack slow.
> You rarely need this, but 'ipfw tee' is one of those cases.
Unless you can queue the same packet to multiple locations. ;^)
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?38471864.7CFA54BF>