Situation
- I used K20 with Hyper-Q function on Windows 7(Visual Studio)
- I have done like below example
Problem
- I heard that K20 can use 32 streams at the same time.
- We can work only 8 streams at the same time.
Question
- Is there any way to use 32 streams at the same time?
- Is it common to see this kind of result? If it is, please tell the technical reason.
for(int i=0 ; i<nStreams ; i++)
{
checkCudaErrors(cudaMemcpyAsync(dev_fimage, fimage, nx * ny * sizeof(float), cudaMemcpyHostToDevice, streams[i]));
}
for(int i=0 ; i<nStreams ; i++)
{
Kernel 1<<<dimGrid_P_ovs, dimBlock, 0, streams[i]>>>(dev_fimage);
Kernel 2<<<dimGrid_P_ovs, dimBlock, 0, streams[i]>>>(dev_fimage);
Kernel 3<<<dimGrid_P_ovs, dimBlock, 0, streams[i]>>>(dev_fimage);
…….
}
for(int i=0 ; i<nStreams ; i++)
{
checkCudaErrors(cudaMemcpyAsync(fimage, dev_fimage, nx * ny * sizeof(float), cudaMemcpyDeviceToHost, streams[i]));
}