ratGPU OpenCL raytracing benchmark

[jogshy]

Can you thread the multiprocessors individually, giving each bank a smaller chunk of the task?
--Matt

Don't think so. All the data grid is automatically assigned to all the GPU's multiprocessors. I neither can "device-fission" an AMD's GPU ( it only works for CPU apparently ) nor assign task's priorities.
Other alternative was to fire several "incomplete" kernels asyncronously to compensate the low # of threads, but the problem is that Fermi only allows to fire 2 kernels simultanously ( In case of ATI, one ).
There's also another problem: each kernel's launch takes a lot of time, so firing a lot of small kernels takes much more time than to fire one big data chunk ( probably due to how PCI-x works ).