From: David Miller <davem@davemloft.net>
To: gandalf@mjufs.se
Cc: shemminger@vyatta.com, dada1@cosmosbay.com, therbert@google.com,
andi@firstfloor.org, netdev@vger.kernel.org
Subject: Re: [PATCH] Software receive packet steering
Date: Thu, 23 Apr 2009 00:34:40 -0700 (PDT) [thread overview]
Message-ID: <20090423.003440.121254229.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.62.0904221628330.10428@wlug.westbo.se>
From: Martin Josefsson <gandalf@mjufs.se>
Date: Wed, 22 Apr 2009 16:33:17 +0200 (CEST)
> On Tue, 21 Apr 2009, Stephen Hemminger wrote:
>
>> I would like to see some way to have multiple CPU's pulling packets
>> and adapting
>> the number of CPU's being used based on load. Basically, turn all
>> device is into
>> receive multiqueue. The mapping could be adjusted by user level (see
>> irqbalancer).
>
> I've been toying with the irqbalancer idea as well.
> Set the number of software "queues" high and have a mapping table of
> queue->cpu and then let irqbalanced which has knowledge of cpu cache
> hirarchy etc balance the load by changing the mapping table as it sees
> fit.
Steering changes without any protocol specific handling is
a total non-started because of packet reordering.
Please understand how deeply important this when considering
any packet steering scheme. You absolutely cannot allow it
to happen.
prev parent reply other threads:[~2009-04-23 7:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 22:48 [PATCH] Software receive packet steering Tom Herbert
2009-04-08 23:08 ` Stephen Hemminger
2009-04-08 23:09 ` Stephen Hemminger
2009-04-08 23:15 ` David Miller
2009-04-09 16:43 ` Tom Herbert
2009-04-09 18:23 ` Ben Hutchings
2009-04-09 21:17 ` David Miller
2009-04-09 0:36 ` David Miller
2009-04-09 4:40 ` Tom Herbert
2009-04-09 5:24 ` David Miller
2009-04-20 10:32 ` Andi Kleen
2009-04-20 10:46 ` David Miller
2009-04-21 3:26 ` Tom Herbert
2009-04-21 9:48 ` Eric Dumazet
2009-04-21 15:46 ` Stephen Hemminger
2009-04-21 18:52 ` Tom Herbert
2009-04-22 9:21 ` David Miller
2009-04-22 15:46 ` Tom Herbert
2009-04-22 18:49 ` Rick Jones
2009-04-22 20:44 ` Jesper Dangaard Brouer
2009-04-23 6:58 ` Jens Axboe
2009-04-23 7:25 ` David Miller
2009-04-23 7:29 ` Jens Axboe
2009-04-23 9:12 ` Jens Laas
2009-04-22 14:33 ` Martin Josefsson
2009-04-23 7:34 ` David Miller [this message]
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