Alexander Motin wrote:
Hi.
Full interrupt rate on some CPU means that your system is not idle, but
running some process. Another possibility is that you have DUMMYNET
compiled into your kernel, which tends to schedule callout for every HZ
tick, effectively blocking skipping interrupts for one of CPUs.
Check 'top -SH' for running processes, or 'top -SH -m io -o vcsw' for
processes doing a lot of context switches. That most likely should give
an answer.
Hi,
It looks like the device polling is what was causing it, once I'd
removed that from kernconf it returned to normal - full interupt rate is
ok though if I can increase the rate to a decent level
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