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    SubjectRe: [RFC] BTS based perf user callchains
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    On Mon, 2010-08-02 at 20:41 +0200, Frederic Weisbecker wrote:
    > On Mon, Aug 02, 2010 at 08:38:52PM +0200, Peter Zijlstra wrote:
    > > 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.
    >
    >
    > Ok. So the buffer is cut on schedule time. It might be nice
    > to maintain the buffer progress across scheduling.

    We flush it into the perf data buffer.


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