Re: [PATCH 00/12] perf lock: New subcommand "perf lock", foranalyzing lock statistics

[Ingo Molnar]

* Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> On Sun, 2010-01-31 at 22:07 +0100, Frederic Weisbecker wrote:
> > 
> > - We are using the -M option from perf tools which multiplexes every
> >   event buffers, which means every cpu commit their lock events in
> >   the same buffer. Couple that with the two above reasons, it's supposed
> >   to scale at worst.
> 
> Why are you doing that? That seems like asking for trouble.. 

But as i said i already tried with -M off and it didnt cure the slowdown.

that -M was just copied over from perf sched (where it makes sense).

	Ingo
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