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

From: Arjan van de Ven
Date: Fri Dec 05 2008 - 02:01:16 EST

On Fri, 5 Dec 2008 07:31:31 +0100
Ingo Molnar <mingo@xxxxxxx> 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

Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at