weird interrupt load / exec behaviour

[Simon 'corecode' Schubert]

hey,






It's really a pitty that it is so slow for compiling :/



Any clues?  Where could I start investigating?

cheers
  simon

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with my new athlon64 3200+ / NForce4 I am seeing a totally weird interrupt load when compiling. Usually the load is at about 80% then and the box doesn't really compile much faster than my duron 1200 before. I've narrowed it down to exec. If I write a program which does nothing but exec itself in a loop, I will get interrupt loads of > 90%. I'm not sure if this is just accounting or real interrupt processing. At the same time vmstat -i doesn't show more interrupts than usual. I'll try a GENERIC kernel and a non-mcpu=athlon64 kernel later, but I doubt this helps.

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