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Hi all, Does anyone know what I'm actually losing with having to set noapic on bootup? I mean in real terms how much harder / slower is an SMP machine working when it's doing standard multi-bus xt polling compared to when it's in APIC poll state. I appreciate that there can be a reduction in interrupt response latency using the damn thing but is this a measurable amount given a machine processing about 1200 interrupts/sec? (this figure is a sum rather than per processor). As an added complication how do I get around interrupt routing conflicts in noapic mode and do the 'routing conflict for xx:xx:xx have X want Y' messages make any difference to this performance? A useful URL (I couldn't find any) or reference would suffice if this is too invloved or boring a topic to explain easily. TIA Tim -- ---------------- Tim Kay systems administrator Advfn.com Plc - http://www.advfn.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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