CUDA: reduction or atomic operations?

Question

I\'m writing a CUDA kernel which involves calculating the maximum value on a given matrix and I\'m evaluating possibilities. The best way I could find is:

Forcing ev

Answer 1

You may also want to use the reduction routines that comes w/ CUDA Thrust which is a part of CUDA 4.0 or available here.

The library is written by a pair of nVidia engineers and compares favorably with heavily hand optimized code. I believe there is also some auto-tuning of grid/block size going on.

You can interface with your own kernel easily by wrapping your raw device pointers.

This is strictly from a rapid integration point of view. For the theory, see tkerwin's answer.