Re: [PATCH 4/4] perf, x86: Add PERF_COUNT_HW_NMI_WATCHDOG event

[Ingo Molnar]

* Don Zickus <dzickus@xxxxxxxxxx> wrote:

> From: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
> 
> Due to restriction and specifics of Netburst PMU we need
> a separated event for NMI watchdog. Note that on all other
> than P4 PMU cpus this event is a simple alias for PERF_COUNT_HW_CPU_CYCLES.
> 
> This event is only used by x86 for now so no other archs involved.

hm, there's no explanation exactly why this is needed and what the alternatives 
are.

This sentence:

> +  /* we use that named non-sleeping calls */

does not parse for me.

Thanks,

	Ingo
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