Abstract
Although nonshared memory programming is widely used in developing applications for the Xeon Phi coprocessor, the Intel C/C++ compiler supports virtual shared memory programming. The advantage of this programming model is that it allows you to have more complex data structures shared between the host and client, removing the requirement that the data objects be bitwise copyable (such that the data can be copied using simple memcpy function) between the host and the coprocessor. With virtual shared memory constructs, the data copied between the host and coprocessor can be arbitrarily complex, including structures containing pointers such as linked list and tree data structures. The data must be placed in the shared virtual space before the offload computation can be performed on the shared virtual memory objects. In this model, the underlying software implements and maintains virtual memory that is shared between the host and the coprocessor.
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