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HSA memory access improvement in signal processing applications

Question asked by pawdzied on Feb 4, 2015
Latest reply on Feb 5, 2015 by jason



I'm working on my paper about processing signals on GPU. From my pre-research I've found out that when it comes to processing input vector/matrix, which will come at about 100MB/s it becomes unprofitable to execute calculations on GPU, though algorithm is well paralleled. The problem is bandwidth of PCI-E interface and need to copy data from CPU memory to GPU memory. As far as I understand when I will be able to build my system around AMD's APU with HSA architecture I should be able to omit this bottleneck and I should be able to 'get back' into 10x CPU performance of my application.

Could you please tell me how well this thing will work? If it works that simple I guess it will be much faster to execute this program in Kaveri APU than on high-end R9 GPU, am I correct?


Thanks for all replies.


Best Regards,