Re: LLC-* events not working on sandybridge

[David Wragg <david@xxxxxxxxx>]

Namhyung Kim <namhyung.kim@xxxxxxx> writes:
> On Sun, 29 Apr 2012 00:03:14 +0100, David Wragg wrote:
>> I've run into a problem with perf on an Intel Sandybridge machine: The
>> LLC-* events never seem to trigger.
>> [...]
>
> I have a same problem on my i7-3930K machine. I guess it's because of
> lacking of extra register (MSP_OFFCORE_RSP_X) settings. But I have no
> idea of how I can set it properly :(.

Ok, I've done some further digging around, and it doesn't look like the
patch "perf events, x86: Implement Sandybridge last-level cache events"
at <https://lkml.org/lkml/2011/5/9/80> ever got merged.  It's not clear
why.

David
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