Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination with perf

Peter Zijlstra
2018-08-02T16:18:35Z

On Thu, Aug 02, 2018 at 09:14:10AM -0700, Reinette Chatre wrote:

> The current implementation does not coordinate with perf and this is
> what I am trying to fix in this series.
>
> I do respect your NAK but it is not clear to me how to proceed after
> obtaining it. Could you please elaborate on what you would prefer as a
> solution to ensure accurate measurement of cache-locked data that is
> better integrated?

We have an in-kernel interface to perf, use that if you want access to
the PMU. You will not directly stomp on PMU registers.