1 Reply Latest reply on Dec 1, 2014 12:47 AM by srp1970

    What's the type of SVM cache supported?


      SVM logically extends global memory into host address space, and the cache support for global memory  on Kaveri is CL_READ_WRITE_CACHE.

      Does it mean that SVM will be cached as read and write type?


      Does anyone know the difference between zero copy buffer and SVM ? which one is preferred to use?

        • Re: What's the type of SVM cache supported?

          Cache behavior depends on fine grain and coarse grain SVM. With coarse grain, since the coherency is guaranteed to sync points like kernel launch/exit, the cache invalidation happens only at sync points. For fine grain, it can be controlled by the developer using c11 memory model/atomics. Zero copy buffer is still buffer and so pointers (within a data structure) cannot be shared.