Re: [RFC][PATCH 0/4] tracing: Add new hwlat_detector tracer

[Daniel Bristot de Oliveira]

On 04/23/2015 05:21 PM, Thomas Gleixner wrote:
> I know of a SMI event counter which is available on newer CPUs and
> Intel promised to add a SMI cycle counter as well. I have no idea
> whether that one ever materialized. PeterZ should know.

The turbostat shows how many SMIs happened during a period. To do it, it
reads the 'MSR_SMI_COUNT' counter. The code's comment says this counter
is there since Nehalem.
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