From: "David S. Miller" <davem@davemloft.net>
To: joern@wohnheim.fh-wedel.de
Cc: netdev@axxeo.de, simlo@phys.au.dk, linux-kernel@vger.kernel.org,
mingo@elte.hu, netdev@vger.kernel.org, ioe-lkml@rameria.de
Subject: Re: Van Jacobson's net channels and real-time
Date: Sat, 22 Apr 2006 22:51:10 -0700 (PDT) [thread overview]
Message-ID: <20060422.225110.34182257.davem@davemloft.net> (raw)
In-Reply-To: <20060422114846.GA6629@wohnheim.fh-wedel.de>
From: Jörn Engel <joern@wohnheim.fh-wedel.de>
Date: Sat, 22 Apr 2006 13:48:46 +0200
> Unless I completely misunderstand something, one of the main points of
> the netchannels if to have *zero* fields written to by both producer
> and consumer. Receiving and sending a lot can be expected to be the
> common case, so taking a performance hit in this case is hardly a good
> idea.
That's absolutely correct, this is absolutely critical to
the implementation.
If you're doing any atomic operations, or any write operations by both
consumer and producer to the same cacheline, you've broken things :-)
next prev parent reply other threads:[~2006-04-23 5:51 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L0.0604201819040.19330-100000@lifa01.phys.au.dk>
2006-04-20 19:09 ` Van Jacobson's net channels and real-time David S. Miller
2006-04-21 16:52 ` Ingo Oeser
2006-04-22 11:48 ` Jörn Engel
2006-04-22 13:29 ` Ingo Oeser
2006-04-22 13:49 ` Jörn Engel
2006-04-23 0:05 ` Ingo Oeser
2006-04-23 5:50 ` David S. Miller
2006-04-24 16:42 ` Auke Kok
2006-04-24 16:59 ` linux-os (Dick Johnson)
2006-04-24 17:19 ` Rick Jones
2006-04-24 18:12 ` linux-os (Dick Johnson)
2006-04-24 23:17 ` Michael Chan
2006-04-25 1:49 ` Auke Kok
2006-04-25 11:29 ` linux-os (Dick Johnson)
2006-05-02 12:41 ` Vojtech Pavlik
2006-05-02 15:58 ` Andi Kleen
2006-04-23 5:52 ` David S. Miller
2006-04-23 9:23 ` Avi Kivity
2006-04-23 5:51 ` David S. Miller [this message]
2006-04-23 5:56 ` David S. Miller
2006-04-23 14:15 ` Ingo Oeser
2006-04-22 19:30 ` bert hubert
2006-04-23 5:53 ` David S. Miller
2006-04-24 17:28 Caitlin Bestler
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