Re: DRI/DRM profiling for performance analysis?

On Mon, 16 Aug 2010 10:22:35 +0300, Pasi Kärkkäinen pasik@iki.fi wrote:

Hello,

Do we currently have a method of profiling DRI/DRM drivers?

I was thinking that it would be interesting to:

1. Execute a benchmark, or some "timedemo" of a game
2. See how many times each dri/drm driver function is called, maybe top 20 most often called functions, and the total cpu time used for those functions.

So you could see that:

1. some function is called often, but it doesn't take much total cpu time.
2. some function is called just a couple of times, but it takes a lot of cpu time.

And everything in between.. would be good hints to use for optimizing the apps/drivers, and for comparison between different versions..

Does this make sense?

The tool to use is called "sysprof" and is ridiculously easy to use (on 32-bit x86). Click start, click stop, see where time was spent, go fix that.