[Haskell-cafe] Profiling OpenGL applications

[Sönke Hahn]

On Sunday, Andrew Coppin asked:

> Is Thread Scope any use for profiling single-threaded programs?

I used threadscope to look at eventlogs from a program that uses OpenGL to 
render multiple frames per second (compiled without "-threaded"). That means, 
there is CPU activity regularly (multiple times per second), and this can be 
observed via threadscope and i found it somewhat useful.

There are some problems, though:

1. I can't definitely tell, which time span corresponds to CPU activity for the 
calculations for one frame. Is it possible to generate threadscope bookmarks 
from within the profiled program? (Or other events that can be shown in 
threadscope?)

2. The GPU activity cannot be observed. This is not a problem specific to 
Haskell, though. Is it even possible (with end user hardware) to get something 
similar to threadscope, not for CPU, but GPU activity? Any other ideas, that 
might help gathering information, about what's going on on the CPU(s) and the 
GPU?

Many thanks,
Sönke