From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: lk@tantalophile.demon.co.uk (Jamie Lokier)
Cc: dank@kegel.com (Dan Kegel),
linux-kernel@vger.kernel.org (linux-kernel@vger.kernel.org),
zab@zabbo.net (Zach Brown)
Subject: Re: is CONFIG_PACKET_MMAP always a win?
Date: Fri, 22 Feb 2002 18:40:01 +0000 (GMT) [thread overview]
Message-ID: <E16eKbx-0002k2-00@the-village.bc.nu> (raw)
In-Reply-To: <20020222180957.A16796@kushida.apsleyroad.org> from "Jamie Lokier" at Feb 22, 2002 06:09:57 PM
> > Overhead: kernel does a full memcpy of the packet body to get it
> > into the ring buffer, and my program does another to get it out.
>
> I had a look at this about a year ago, and it seems there is no method
> provided to read the packets without copying them, if you need them in
> user space.
You can process them in the ring buffer. If you can't keep up then you
are screwed any way you look at it 8)
next prev parent reply other threads:[~2002-02-22 18:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-22 1:51 Dan Kegel
2002-02-22 2:33 ` Alan Cox
2002-02-22 5:59 ` David S. Miller
2002-02-22 6:45 ` Ben Greear
2002-02-22 7:04 ` Dan Kegel
2002-02-22 14:04 ` Maciej W. Rozycki
2002-02-22 8:37 ` Gianni Tedesco
2002-02-22 18:09 ` Jamie Lokier
2002-02-22 18:40 ` Alan Cox [this message]
2002-02-22 19:04 ` Jamie Lokier
2002-02-22 19:57 ` Alan Cox
2002-02-22 21:44 ` Mike Fedyk
2002-02-23 0:24 ` Alan Cox
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