Determine if Memory Accesses are Being Coalesced

Accelerated Computing CUDA CUDA Programming and Performance
#1

I am having problems getting my CUDA program to perform the way I expect it to. I think the problem is that I am not achieving coalescing in one of my global memory accesses.

Is there any way to determine (for sure) if memory accesses are being coalesced or not?

Thanks,
Bill

#2

Try CUDA Visual Profiler

#3

Thank you for this tool. This will be very helpful for my continued work in the field of GPUs.

However it looks like there is a bit of a learning curve associated with getting this installed and using it. The project I’m working on is already past due. Is there any other way to determine this information?

#4

There isn’t much of a learning curve to it. Install it, select the .exe output from your last compiled run. Select a runtime, start it up and let it run. It will then display all the information in a nice chart for you.