Messages in this thread | | | Subject | Re: IRQ handling difference between i386 and x86_64 | From | Arjan van de Ven <> | Date | Sat, 30 Jun 2007 08:40:35 -0700 |
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On Sat, 2007-06-30 at 16:55 +0200, Krzysztof Oledzki wrote: > Hello, > > It seems that IRQ handling is somehow different between i386 and x86_64. > > In my Dell PowerEdge 1950 is it possible to enable interrupts spreading > over all CPUs. This a single CPU, four CORE system (Quad-Core E5335 Xeon) > so I think that interrupts migration may be useful. Unfortunately, it > works only with 32-bit kernel. Booting it with x86_64 leads to situation, > when all interrupts goes only to the first cpu matching a smp_affinity > mask.
arguably that is the most efficient behavior... round robin of interrupts is the worst possible case in terms of performance
are you using irqbalance ? (www.irqbalance.org)
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