From: rick jones <rick.jones2@hp.com>
To: netdev@oss.sgi.com
Subject: Re: Intel and TOE in the news
Date: Sun, 20 Feb 2005 11:45:02 -0800 [thread overview]
Message-ID: <91f1bcca156f343c17918ce67ef23666@hp.com> (raw)
In-Reply-To: <m1psywb8i4.fsf@muc.de>
> <speculating freely>
>
> It would be nice if the NIC could asynchronously trigger prefetches in
> the CPU. Currently a lot of the packet processing cost goes
> to waiting for read cache misses.
>
> E.g.
>
> - NIC receives packet.
> - Tells target CPU to prefetch RX descriptor and headers.
> - CPU later looks at them and doesn't have to wait a for a cache miss.
>
> Drawback is that you would need to tell the NIC in advance
> on which CPU you want to process the packet, but with Linux
> IRQ affinity that's easy to figure out.
With all the interrupt avoidance that is going-on these days, would
prefetching in the driver be sufficient? Presumably the driver is
going to be processing multiple packets at a time on an interrupt/etc
so having it issue prefetches in SW would seem to help with all but the
very first packet.
rick jones
Wisdom teeth are impacted, people are affected by the effects of events
next prev parent reply other threads:[~2005-02-20 19:45 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-19 3:44 Intel and TOE in the news Jeff Garzik
2005-02-19 4:10 ` Lennert Buytenhek
2005-02-19 19:46 ` David S. Miller
2005-02-19 20:27 ` Andi Kleen
2005-02-19 20:32 ` Lennert Buytenhek
2005-02-20 16:46 ` Eugene Surovegin
2005-02-21 14:01 ` jamal
2005-02-20 19:45 ` rick jones [this message]
2005-02-20 21:20 ` Michael Richardson
2005-02-20 21:29 ` Andi Kleen
2005-02-20 22:43 ` Leonid Grossman
2005-02-20 23:07 ` Andi Kleen
2005-02-21 1:57 ` Alex Aizman
2005-02-21 2:37 ` Jeff Garzik
2005-02-21 19:34 ` Alex Aizman
2005-02-21 20:34 ` Jeff Garzik
2005-02-22 0:50 ` Alex Aizman
2005-02-21 11:37 ` Andi Kleen
2005-02-21 3:31 ` Leonid Grossman
2005-02-21 11:50 ` Andi Kleen
2005-02-21 13:28 ` Thomas Graf
2005-02-21 14:03 ` jamal
2005-02-21 14:17 ` Thomas Graf
2005-02-21 14:31 ` jamal
2005-02-21 15:34 ` Thomas Graf
2005-02-21 15:48 ` jamal
2005-02-21 16:40 ` Thomas Graf
2005-02-21 17:03 ` jamal
2005-02-21 20:12 ` patrick mcmanus
2005-02-21 21:12 ` jamal
2005-03-06 11:21 ` Harald Welte
2005-02-21 21:41 ` Thomas Graf
2005-02-21 15:38 ` Robert Olsson
2005-02-21 15:50 ` jamal
2005-02-21 13:44 ` jamal
2005-02-21 16:52 ` Leonid Grossman
2005-02-21 17:11 ` jamal
2005-02-21 18:02 ` Leonid Grossman
2005-02-22 18:02 ` Stephen Hemminger
2005-02-22 18:07 ` Andi Kleen
2005-02-22 20:51 ` Leonid Grossman
2005-02-22 21:20 ` Rick Jones
2005-02-22 21:30 ` Leonid Grossman
2005-02-22 21:42 ` Rick Jones
2005-02-22 22:10 ` Leonid Grossman
2005-02-22 21:43 ` Andi Kleen
2005-02-22 22:17 ` Leonid Grossman
2005-02-22 22:42 ` Andi Kleen
2005-02-22 22:51 ` Leonid Grossman
2005-03-14 20:22 ` [ANNOUNCE] Experimental Driver for Neterion/S2io 10GbE Adapters Alex Aizman
2005-03-14 20:38 ` David S. Miller
2005-03-14 20:53 ` Leonid Grossman
2005-03-14 23:27 ` Andi Kleen
2005-03-14 23:45 ` Jeff Garzik
2005-03-15 0:32 ` Leonid Grossman
2005-03-15 1:07 ` Alex Aizman
2005-03-15 1:29 ` Rick Jones
2005-03-15 2:28 ` Leonid Grossman
2005-03-15 15:07 ` Leonid Grossman
2005-03-15 15:55 ` Leonid Grossman
2005-03-19 20:15 ` Andi Kleen
2005-03-19 22:19 ` Leonid Grossman
2005-03-20 13:40 ` jamal
2005-03-20 20:13 ` Leonid Grossman
2005-03-15 5:14 ` Scott Feldman
2005-03-15 5:59 ` Matt Mackall
2005-03-15 6:02 ` Leonid Grossman
2005-02-22 17:27 ` Intel and TOE in the news Andi Kleen
2005-02-19 20:29 ` Lennert Buytenhek
2005-03-02 13:48 ` Lennert Buytenhek
2005-03-02 17:34 ` Leonid Grossman
2005-02-21 13:59 ` P
2005-02-21 14:10 ` jamal
2005-02-21 22:44 ` Stephen Hemminger
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