3 replies to this topic

[Martin Perry]

Hi, i have problem measuring times of compute shaders.

I am using QueryPerformanceCounter (and for checking also clock()). Both gave +- same results in ms. But if I measure time on my stopwatch I gave totally different time.
C++ timer says 10ms, but its rubbish. Application (computer) freezes for about 30 seconds during shader execution.

How can I measure this ?

Thanks

[Hodgman]

I'm guessing that you're measuring the amount of time it takes for the CPU to submit your workload, not the amount of time it takes the GPU to actually execute the work?
Perhaps you should post some code or describe your testing methodology.

[Martin Perry]

Version with clock

clock_t initial = clock();
this->deviceContext->Dispatch(this->group.x, this->group.y, this->group.z);

clock_t current = clock();
float diff = (current - initial); //ms

[Martin Perry]

OK.. I solved it.. I used DX Query profiling...