can one CPU talk to more than one GPU

Hi guys,

Is it possible to write a CUDA program that uses one CPU to drive more than one GPU?? :rolleyes:
Is there any restriction that there is one -to -one mapping between CPU-GPU??

since the CPU has to wait until the GPU completes the computation…instead it can be used to give compute instructions for another GPU.

any suggestions
Thanks in advance

Yes.Using cudaSetDevice()

Yes, two GPUs can not interact with each other but through CPU.

You will basically need a CPU thread for each GPU you want to address.

cudaSetDevice works within the thread that invoked it, so there’s a 1-1 mapping between a GPU and a CPU thread. You can naturally run more than one thread on a CPU.

Thank You cirus and Big_Mac
that helped a lot :thumbup: