GPGPU Programming for Games and Science

Practical Matters 243

with a tool called Intel Inspector XE 2013 that helps you track down memory

errors, leaks, and threading problems.

5.3.2 Performance on the GPU

Performance measurements on the GPU are possible at a high level us-

ing only D3D11 support. Firstly, you can always measure frame rate dur-

ing idle loop time to give you a coarse idea of how long something takes

to compute or how much faster something is after you have made shader

changes. The GTEngine sample applications show how to do this. Secondly,

the

ID3D11Device interface allows queries related to timing. Listing 5.8 shows

the basic code. The

HRESULT processing is omitted for simplicity ...