Re: perf_counters issue with enable_on_exec

From: stephane eranian
Date: Mon Aug 24 2009 - 12:16:53 EST

On Mon, Aug 24, 2009 at 6:06 PM, Peter Zijlstra<a.p.zijlstra@xxxxxxxxx> wrote:
> On Mon, 2009-08-24 at 18:03 +0200, stephane eranian wrote:
>> >> Â2) enable_on_exec on !leader counters is undefined
>> >
>> > then fail it.
> Or make it work :-)
But what would that mean given how a group is made runnable?

>> In other words, I think timing_enabled is measuring the wrong thing.
>> It should be instead called time_runnable and it should measure the
>> time during which the event is runnable, i.e, its group is runnable. That
>> means the event (group) could be dispatched if PMU was "free".
> I tend to agree with you, but I'm hoping Paul will speak since he wrote
> both the time accounting and the enable_on_exec thing.
Fair enough.
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