From: Stephen Hemminger <shemminger@vyatta.com>
To: David Miller <davem@davemloft.net>
Cc: peter.p.waskiewicz.jr@intel.com, jeffrey.t.kirsher@intel.com,
gospo@redhat.com, netdev@vger.kernel.org
Subject: Re: [net-next-2.6 PATCH 2/3] ixgbe: Set MSI-X vectors to NOBALANCING and set affinity
Date: Fri, 23 Oct 2009 06:45:52 +0900 [thread overview]
Message-ID: <20091023064552.6ca3cbd8@s6510> (raw)
In-Reply-To: <20091022.035601.193700201.davem@davemloft.net>
On Thu, 22 Oct 2009 03:56:01 -0700 (PDT)
David Miller <davem@davemloft.net> wrote:
> From: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
> Date: Thu, 22 Oct 2009 01:22:36 -0700
>
> > The first thing any performance guide says is to disable irqbalance
>
> Such guides are wrong, and that's the end of this discussion.
>
> These kinds of guides also say to do all kinds of crazy things with
> the socket sysctl settings. That's wrong too and we absolutely do not
> do things to accomodate nor support those guide suggestions.
>
> And we won't do that here.
>
> I'm especially not going to succumb in this case because Arjan has
> been more than responsive to making sure irqbalanced in userspace does
> the right thing for networking devices, even multiqueue ones.
>
> So we can make it do the right thing when flow director is present.
> In fact, the thing you want for flow director makes sense in the
> general case too.
irqbalance daemon already has IRQBALANCE_BANNED_INTERRUPTS
to work around this. It also has code to special case devices, if you
think ixgbe needs special treatment, why not do it there.
next prev parent reply other threads:[~2009-10-22 21:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-21 2:26 [net-next-2.6 PATCH 1/3] irq: Export irq_set_affinity() for drivers Jeff Kirsher
2009-10-21 2:27 ` [net-next-2.6 PATCH 2/3] ixgbe: Set MSI-X vectors to NOBALANCING and set affinity Jeff Kirsher
2009-10-22 4:50 ` David Miller
2009-10-22 8:22 ` Peter P Waskiewicz Jr
2009-10-22 10:56 ` David Miller
2009-10-22 21:45 ` Stephen Hemminger [this message]
2009-11-12 19:12 ` Waskiewicz Jr, Peter P
2009-11-18 18:10 ` David Miller
2009-11-18 19:46 ` Ben Hutchings
2009-11-18 19:50 ` David Miller
2009-11-19 1:14 ` Peter P Waskiewicz Jr
2009-11-19 6:28 ` David Miller
2009-10-21 2:27 ` [net-next-2.6 PATCH 3/3] ixgbe: Make queue pairs on single MSI-X interrupts Jeff Kirsher
2009-10-21 15:35 ` [net-next-2.6 PATCH 1/3] irq: Export irq_set_affinity() for drivers Ben Hutchings
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