Hi, Could someone explain differences and relations between the SVM(Shared Virtual Memory, by Intel), HSA(Heterogeneous System Architecture, by AMD), HMM(Heterogeneous Memory Management, by Glisse) and UM(Unified Memory, by NVIDIA) ? Are these in the substitutional relation? As I understand it, these aim to solve the same thing, sharing pointers between CPU and GPU(implement with ATS/PASID/PRI/IOMMU support). So far, SVM and HSA can only be used by integrated gpu. And, Intel declare that the root ports doesn't not have the required TLP prefix support, resulting that SVM can't be used by discrete devices. So could someone tell me the required TLP prefix means what specifically? With HMM, we can use allocator like malloc to manage host and device memory. Does this mean that there is no need to use SVM and HSA with HMM, or HMM is the basis of SVM and HAS to implement Fine-Grained system SVM defined in the opencl spec?
Thanks, Zongyong Wu
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