Re: [patch 0/3] [Announcement] Performance Counters for Linux

Arjan van de Ven
2008-12-05T07:00:58Z

On Fri, 5 Dec 2008 07:31:31 +0100
Ingo Molnar <mingo@elte.hu> wrote:

> Btw., i'm curious, why would we want to do that? It skews the results
> if the task continues executing and counters stop. To get the highest
> quality profiling output the counters should follow the true state of
> the task that is profiled - and events should be passed to the
> monitoring task asynchronously. The _events_ can contain precise
> coupled information
> - but the counters should continue.

btw stopping the task on counter overflow is an issue for things that
want to self profile, like JITs

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Arjan van de Ven Intel Open Source Technology Centre
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