Messages in this thread | | | Date | Wed, 3 Feb 2021 15:47:14 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 3/3] perf/x86/rapl: Fix psys-energy event on Intel SPR platform |
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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.
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