Re: HW breakpoints perf_events request

[Andi Kleen]

> We would like to avoid using ptrace at all costs.
> It requires us to have a parent thread running
> which monitors all the others.  It's not clear that
> the wait() call by the parent doesn't mask a barrage
> of signals from various threads and the performance

mask? It'll report them. You expect to have so 
many signals that this would be a problem?

-Andi
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