Asynchronous GPU calculations
1 view (last 30 days)
Show older comments
In the latest release, GPU calls execute asynchronously to the CPU. But do also GPU calls themselves run asynchronously? I.e. does multiple calls using e.g. feval(CUDA_kernel, ...) execute at the same time, or does the GPU wait for subsequent calls to finish? Does one need to impose wait() between feval to guarantee that the calls execute in order on the GPU? Experimental tests indicate that wait() is not needed, but it would be nice with a proper guarantee.
0 Comments
Accepted Answer
Edric Ellis
on 17 Apr 2012
The asynchronous nature of the kernel invocations should be completely transparent in terms of functionality (if it isn't, then that would be a bug), the "wait()" is required only when attempting to get timings for portions of code.
2 Comments
Jill Reese
on 17 Apr 2012
Yes, this code will be executed properly. And gather does wait for the variable it is transferring to be completely evaluated before the transfer starts.
More Answers (0)
See Also
Categories
Find more on GPU Computing in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!