time accounting problem (powerpc only?)

[Johannes Berg]

Hi,

[can you CC me? I can sometimes only skim the lists]

> No, I saw the high hardware interrupt value in top and looked at
> /proc/interrupts and concluded that those are the evil source of the
> high load.
> 
> > I'm fairly sure that I always had rather high numbers of interrupt
> > here. And the system isn't sluggish or unresponsive as you'd expect if
> > the IRQs actually did take 90% of the CPU time!
> 
> Okay, so what might be the source?

I'd guess NOHZ is the problem because we're letting the CPU not do
anything rather than doing idle ticks or something.

johannes
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