Date: Thu, 1 Aug 2013 16:40:05 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
        Namhyung Kim <namhyung@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 6/8] perf: Account freq events per cpu
Message-ID: <20130801144005.GG27162@twins.programming.kicks-ass.net>
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 <20130801133155.GB27162@twins.programming.kicks-ass.net>
 <20130801135525.GE431@somewhere>
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On Thu, Aug 01, 2013 at 04:21:11PM +0200, Frederic Weisbecker wrote:
> > > Yeah, just go with a single global state for now..
> > 
> > The perf default is to create inherited counter, which are per cpu
> > anyway. So we'll not loose much.
> 
> So you mean that I keep the per cpu state when event->cpu != -1 and also have
> a global counter for the others. Right?

No, only a single global counter. The fact that perf, by default,
creates a counter per cpu, means that there's little effective
difference between a single global counter and per-cpu counters.
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