Messages in this thread | | | Subject | Re: irq balancing question | From | Arjan van de Ven <> | Date | Fri, 23 Feb 2007 15:45:17 +0100 |
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On Fri, 2007-02-23 at 13:32 +0200, 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.
you have only one card? then balancing like you say will only really hurt you; neither linux nor the chipset will do this.
> 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.
if you have multiple real interrupt sources you can balance between them using irqbalance, see http://www.irqbalance.org But note that this program will NOT move one irq across 4 cpus all the time, since that gives *really* bad performance.
-- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org
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