On Tue, Nov 13, 2007 at 01:13:45PM -0800, Stephane Eranian wrote:
> Oprofile does not setup the PMU interrupt. It builds on top of the NMI watchdog
> setup.
Oprofile works without the NMI watchdog too, but it just happens to be another
NMI user.
> It uses the register_die() mechanism,
Not correct.
> if I recall. The low level APIC
> and gate is setup elsewhere. Perfmon does not use NMI, unless forced to because
> of the NMI watchdog.
It could handle it in the same way as oprofile if it wanted. But given
NMIs make everything more complicated and it might not be worth it.
-Andi
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