SHARING VIRTUAL FUNCTIONS IN A SHARED VIRTUAL MEMORY BETWEEN HETEROGENEOUS PROCESSORS OF A COMPUTING PLATFORM

摘要

A computing platform may include heterogeneous processors (e.g., CPU and a GPU) to support sharing of virtual functions between such processors. In one embodiment, a CPU side vtable pointer used to access a shared object from the CPU 110 may be used to determine a GPU vtable if a GPU-side table exists. In another embodiment, a shared non-coherent region, which may not maintain data consistency, may be created within the shared virtual memory. The CPU and the GPU side data stored within the shared non-coherent region may have a same address as seen from the CPU and the GPU side. However, the contents of the CPU-side data may be different from that of GPU-side data as shared virtual memory may not maintain coherency during the run-time. In one embodiment, the vptr may be modified to point to the CPU vtable and GPU vtable stored in the shared virtual memory.

主权项

1. A platform comprising:
a combination of a central processing unit (CPU) and a graphics processing unit (GPU); and a shared physical memory to be accessible to both the GPU and CPU, wherein the platform is capable of mapping the shared physical memory to a shared virtual memory accessible to both the CPU and GPU,wherein the platform is to:
store a shared object including a plurality of virtual functions in the shared virtual memory; and share at least one of the plurality of virtual functions between the CPU and the GPU.