Re: [PATCH 3/3] perf/x86/rapl: Fix psys-energy event on Intel SPR platform

[Peter Zijlstra]

FWIW, your email is malformed, please wrap at 78 chars.

On Mon, Jan 25, 2021 at 06:11:14AM +0000, Zhang, Rui wrote:
> In short, the current code does not allow RAPL energy counter to
> return 0. And all the work I do is to allow Psys energy counter to
> return 0.

Ok.

> In this way, the Psys event is "valid" on all CPUs, so we don't need
> to handle the master thing.

So RAPL is mapped to DIEs, and IIRC we can have multiple DIEs per
Package. But the master thing is a Package.

Is this all moot because SPR has one DIE per Package? Because if it
would have more, there's be more interesting problems I suppose.