Re: [RFC PATCH 0/3] perf: show package power consumption in perf

[Lin Ming]

On Thu, 2010-08-19 at 15:54 +0800, Matt Fleming wrote:
> On Thu, Aug 19, 2010 at 11:28:17AM +0800, Lin Ming wrote:
> > On Wed, 2010-08-18 at 20:41 +0800, Matt Fleming wrote:
> > > 
> > > I had a quick look over the patches and Peter is right - the group
> > > events stuff would probably fit quite well here. Unfortunately, due to
> > > holidays and things, I haven't been able to get them finished
> > > yet. I'll get on that ASAP.
> > 
> > Hi, Matt
> > 
> > What's the "group events stuff"?
> > Is there some discussion on LKML or elsewhere I can have a look at?
> > 
> > Thanks,
> > Lin Ming
> 
> The relevant information can be found here in this thread,
> http://lkml.org/lkml/2010/8/4/174. I'm working on some patches for
> this but they're not finished yet. I can probably get something to
> show by next week.

Thanks.

> 
> The discussion started because the performance counters on SH do not
> generate an interrupt on overflow, so we need to periodically sample
> them. Am I correct in thinking that the energy counters also do not
> generate an interrupt on overflow and that's why you wrote the event
> as a software event?

I think so.

Rui, could you confirm this?


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