Re: [RFC] BTS based perf user callchains

From: Peter Zijlstra
Date: Mon Aug 02 2010 - 14:39:16 EST

On Mon, 2010-08-02 at 20:35 +0200, Frederic Weisbecker wrote:
> I'm not even sure that will work. Also, while looking at the BTS implementation
> in perf, I see we have one BTS buffer per cpu. But that doesn't look right as
> the code flow is not linear per cpu but per task. Hence I suspect we need
> one BTS buffer per task. But may be someone tried that and encountered a
> problem?

IIRC we flush the buffer when we deschedule the counter.
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