Messages in this thread | | | Date | Tue, 13 Nov 2007 22:29:02 +0100 | From | Andi Kleen <> | Subject | Re: [perfmon] Re: [perfmon2] perfmon2 merge news |
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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.
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