cudaGraphicsUnmapResources and concurrent copy and execute

Accelerated Computing CUDA CUDA Programming and Performance
1

I’m trying to build a program that combines CUDA and OpenGL and uses concurrent copy and execute on kernels.

It seems to mostly work fine except for the call to cudaGraphicsUnmapResources on a map texture that despite accepting a stream as input will not allow a copy to device to happen in parallel.

Anyone know if there is a way around this?

I’m using CUDA 4 with 280 drivers at the moment.

Thanks

2

You’re not using the default stream anywhere are you?

3

Before the pipeline starts, nowhere in the pipeline, and the profiler verifies this. The only thing that doesn’t explicitly use a stream and I didn’t see that it is possible is cudaGraphicsSubResourceGetMappedArray.