question on FSL_EMB perf

Scott Wood scottwood at freescale.com
Thu Jun 11 05:17:10 AEST 2015


On Wed, 2015-06-10 at 13:41 +0200, Peter Zijlstra wrote:
> Hi Mike, Ben,
> 
> I just noticed:
> 
> arch/powerpc/Kconfig:   select HAVE_PERF_EVENTS_NMI if PPC64
> 
> But can't ppc32 have FSL_EMB perf?

Yes, but it doesn't use NMIs.  ppc64 has lazy interrupt disabling 
which functions as a pseudo-NMI.

-Scott



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