From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: therbert@google.com, netdev@vger.kernel.org
Subject: Re: small RPS cache for fragments?
Date: Tue, 17 May 2011 23:00:50 +0200 [thread overview]
Message-ID: <1305666050.2691.4.camel@edumazet-laptop> (raw)
In-Reply-To: <20110517.164929.1737248436066795381.davem@davemloft.net>
Le mardi 17 mai 2011 à 16:49 -0400, David Miller a écrit :
> From: Tom Herbert <therbert@google.com>
> Date: Tue, 17 May 2011 13:02:25 -0700
>
> > I like it! And this sounds like the sort of algorithm that NICs might
> > be able to implement to solve the UDP/RSS unpleasantness, so even
> > better.
>
> Actually, I think it won't work. Even Linux emits fragments last to
> first, so we won't see the UDP header until the last packet where it's
> no longer useful.
>
> Back to the drawing board. :-/
Well, we could just use the iph->id in the rxhash computation for frags.
At least all frags of a given datagram should be reassembled on same
cpu, so we get RPS (but not RFS)
next prev parent reply other threads:[~2011-05-17 21:00 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 18:33 small RPS cache for fragments? David Miller
2011-05-17 20:02 ` Tom Herbert
2011-05-17 20:17 ` Rick Jones
2011-05-17 20:41 ` Rick Jones
2011-05-17 20:49 ` David Miller
2011-05-17 21:00 ` Eric Dumazet [this message]
2011-05-17 21:10 ` David Miller
2011-05-17 21:13 ` Rick Jones
2011-05-17 21:13 ` Ben Hutchings
2011-05-17 21:26 ` David Miller
2011-05-17 21:40 ` Rick Jones
2011-05-17 21:27 ` Eric Dumazet
2011-05-17 21:11 ` Rick Jones
2011-05-17 21:11 ` Ben Hutchings
2011-05-17 21:27 ` Tom Herbert
2011-05-17 21:28 ` David Miller
2011-05-17 23:59 ` Changli Gao
2011-05-18 6:37 ` David Miller
2011-05-17 20:14 ` Eric Dumazet
2011-05-17 20:47 ` David Miller
2011-05-17 21:44 ` Andi Kleen
2011-05-17 21:52 ` Eric Dumazet
2011-05-17 22:03 ` Andi Kleen
2011-05-17 21:44 ` David Miller
2011-05-17 21:48 ` Andi Kleen
2011-05-17 21:50 ` David Miller
2011-05-17 22:06 ` Andi Kleen
2011-05-17 22:42 ` Rick Jones
2011-05-24 20:01 ` David Miller
2011-05-24 21:38 ` Rick Jones
2011-06-04 20:29 ` David Miller
2011-06-06 17:08 ` Rick Jones
2011-06-06 17:15 ` Eric Dumazet
2011-06-06 18:06 ` Rick Jones
2011-06-06 19:23 ` David Miller
2011-06-06 19:22 ` David Miller
2011-06-06 20:05 ` Rick Jones
2011-06-06 21:06 ` Jay Vosburgh
2011-06-06 21:40 ` David Miller
2011-06-06 22:49 ` Chris Friesen
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