On Sat, Sep 01, 2012 at 07:44:17PM -0700, Arjan van de Ven wrote: > On 9/1/2012 6:36 PM, Ben Widawsky wrote: > > > It depends on what you're trying to measure. I think this patch is quite useful but I think I'll make you defend your patch now since you're the maintainer and you took > > your own patch and you're shooting down my idea. So please tell me what PowerTOP should do with this patch other than notice we're stuck (and furthermore, even if we're > > stuck, what should it tell us to do)? > > what I would like to do, as the powertop guy.... is to show frequency stats similar to how we do that > for CPUs. E.g. as close as to actual as we can get. > few questions: > 1) Can I read the momentary frequency somewhere? > (it's great to get change events, but I also need a start frequency, otherwise I have a gap in > knowledge from start of measurement to first change event) Oops, forgotten about this, but it looks like Ben has already volunteered himself for those ;-) > 2) Can I read a "hardware average" somewhere, similar to what we can do for cpus ? Afaik, there's nothing. But since the cpu controls the gpu freq completely, you can just compute those yourselves from the tracepoints. Together with the rc6 residency timers we already expose this should give a neat overview of how busy the gpu is and how much power it blows through -Daniel -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
