From: David Miller <davem@davemloft.net>
To: peter.p.waskiewicz.jr@intel.com
Cc: 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: Thu, 22 Oct 2009 03:56:01 -0700 (PDT) [thread overview]
Message-ID: <20091022.035601.193700201.davem@davemloft.net> (raw)
In-Reply-To: <1256199756.2634.65.camel@ppwaskie-mobl2>
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.
next prev parent reply other threads:[~2009-10-22 10:55 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 [this message]
2009-10-22 21:45 ` Stephen Hemminger
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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