Memory copy between two CUDA contexts

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi all!

I have two CPU threads, each have associated CUDA context. Both work with one CUDA device.
Is it possible to copy memory from one cuda context to another cuda context ? (device to device)

I can workaround this by copying memory device to host on one context and then host to device on another context, but this is inefficient.

2

At the moment, sending data through an intermediary host buffer is the only way, but I think NVIDIA is working on this for a future CUDA release.