Hi all,
I have a conceptual question regarding reading the data back from the GPU to host. Can I use clEnqueueReadBuffer() or clEnqueueMapBuffer() interchangeably? Which one is better? I read about both of them but I am confused about the difference between mapping and copying?
Also when we create buffer usign clCreateBuffer we have different flag options. For CL_MEM_USE_HOST_PTR table 4.3 of AMD OpenCL programming guide mentions:
------ Location ------ ------- Map Mode------ ------Map Location---
----Device Memory---- ----Copy---- ---- Pinned Host Memory---
Could anyone please explain the significance of Map Location here? Can I use any of the clEnqueueReadBuffer() or clEnqueueMapBuffer() here to read the data back?
I appreciate any help.
Richeek