Hi, Peter, On Wed, 2021-02-03 at 15:47 +0100, Peter Zijlstra wrote: > 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?
Oh, right. This is not a problem on SPR because it is a single-die platform. > Because if it > would have more, there's be more interesting problems I suppose. Agreed. thanks, rui