Benchmarking warning

Hi,

I get the following warning in the kernel messages:

kvm: emulating preempt notifiers; do not benchmark on this machine

Is this an accurate warning, should the machine not be used for benchmarking KVM? or does it mean don't benchmark other applications on the host?

Thanks,
Cam

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It's accurate.

It's when running kvm (it traps every process scheduling). On newer hosts (2.6.23 >=) the preempt notifiers are integrated and there is no need tapping the scheduler.

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