linux-kernel - Re: [PATCH V2 1/1] perf/x86: Add Intel power cstate PMUs support

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Message-ID: <20150806213243.GA16853@twins.programming.kicks-ass.net>
Date:	Thu, 6 Aug 2015 23:32:43 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	"Liang, Kan" <kan.liang@...el.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 1/1] perf/x86: Add Intel power cstate PMUs support

On Thu, Aug 06, 2015 at 11:14:17AM -0700, Stephane Eranian wrote:
> On Thu, Aug 6, 2015 at 8:44 AM, Peter Zijlstra <peterz@...radead.org> wrote:
> >> +static cpumask_t power_cstate_core_cpu_mask;
> >
> > That one typically does not need a cpumask.
> >
> You need to pick one CPU out of the multi-core. But it is for client parts thus
> there is only one socket. At least this is my understanding.

Oh crud, core as in a group of SMT. There's so much core as in logical
cpu usage around these days I got confused :/
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