Re: [perfmon2] [perfmon] Re: perfmon2 merge news
Status: Beta
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From: Andi K. <an...@fi...> - 2007-11-13 21:29:00
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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. -Andi |