netdev - Re: [PATCH] xps-mq: Transmit Packet Steering for multiqueue

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Message-ID: <1298316700.2768.687.camel@jerms-wks.usersys.redhat.com>
Date:	Mon, 21 Feb 2011 14:31:40 -0500
From:	Jeremy Eder <jeder@...hat.com>
To:	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] xps-mq: Transmit Packet Steering for multiqueue

On Mon, 2011-02-21 at 18:19 +0000, Ben Hutchings wrote:
> On Wed, 2010-09-01 at 18:32 -0700, David Miller wrote:
> > From: Tom Herbert <therbert@...gle.com>
> > Date: Wed, 1 Sep 2010 09:24:18 -0700
> > 
> > > On Wed, Sep 1, 2010 at 8:54 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> > >> 3) Eventually have a user selectable selection (socket option, or system
> > >> wide, but one sysctl, not many bitmasks ;) ).
> > >>
> > > Right, but it would also be nice if a single sysctl could optimally
> > > set up multiqueue, RSS, RPS, and all my interrupt affinities for me
> > > ;-)

Are cgroups the right place to have the network stack pull "guidance"
from ?

If an app is bound to a socket/core/NUMA node; then the network stack
could inherit the cgroup's tuning and adjust kernel knobs accordingly.

This would not replace procfs tuning, but it seems like a natural
extension of how cgroups and RPS/RFS/XPS could be integrated to ease the
management burden that these new technologies might impose.

--jer

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