"Real shared memory is here. Just to be on the same page, I mean sharing a pointer of allocated memory between CPU and GPU without paying dearly for it.

For the past few years all the major hardware vendors have created their own SOC (System on Chip) which means that all or most of the components of the system are on one piece of silicon. These systems  are mostly targeted at low power, whether intended for the mobile market (Qualcomm, Imagination, Nvidia [Tegra] ) or traditional CPU-based markets (Intel and AMD)."
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