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From: Robert Hancock <hancockr@shaw.ca>
To: Imre Gergely <imre.gergely@astral.ro>
Cc: linux-kernel@vger.kernel.org
Subject: Re: irq balancing question
Date: Fri, 23 Feb 2007 08:39:13 -0600	[thread overview]
Message-ID: <45DEFC91.2050908@shaw.ca> (raw)
In-Reply-To: <fa.o8VX4Uax4/73QDX3vvhLW5NBvRE@ifi.uio.no>

Imre Gergely wrote:
> hi
> 
> i have a SMP with 2x duo-core Opteron processors, and i have an ethernet card
> (eth0). i want to balance the interrupts generated by the card to all 4
> processors. i can do this by writing to smp_affinity, but on another machine it
> get's done by "default", without doing anything.
> 
> is this irq balancing a feature in the chipset, or driver, or kernel ? i got
> the idea of the smp_affinity stuff, and i've set it to "f", but nothing
> happens, i mean i see only one CPU getting the interrupts.
> 
> i'm using kernel 2.6.18, but tried with 2.6.19, too.

You need to run the irqbalance daemon to do this, unless the interrupts 
are distributed in hardware (which only some machines do).

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/


       reply	other threads:[~2007-02-23 14:39 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fa.o8VX4Uax4/73QDX3vvhLW5NBvRE@ifi.uio.no>
2007-02-23 14:39 ` Robert Hancock [this message]
2007-02-23 11:32 Imre Gergely
2007-02-23 14:45 ` Arjan van de Ven
2007-02-23 14:58   ` Gergely Imre
2007-02-23 15:54     ` Arjan van de Ven
2007-02-23 18:51       ` Gergely Imre
2007-02-23 19:01         ` Arjan van de Ven
2007-02-23 20:57           ` Gergely Imre
  -- strict thread matches above, loose matches on Subject: below --
2005-12-15 14:00 Pallipadi, Venkatesh
2005-11-17  8:28 ` JaniD++
2005-12-15  0:48 Pallipadi, Venkatesh
2005-12-15  9:10 ` JaniD++
2005-12-14 21:05 JaniD++
2005-12-14 21:16 ` Arjan van de Ven
2005-12-14 21:31   ` JaniD++

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