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Graphics processing units (GPUs) have specialized throughput-oriented memory systems optimized for stream-ing writes with scratchpad memories to capture locality explicitly. Expanding the utility of GPUs beyond graphics encourages designs that simplify programming (e.g., using caches instead of scratchpads) and better support irregular applications with finer-grain synchronization. Our hypothe-sis...
Although current homogeneous chips tightly couple the cores with cache-coherent shared virtual memory (CCSVM), this is not the communication paradigm used by any current heterogeneous chip. In this paper, we present a CCSVM design for a CPU/GPU chip, as well as an extension of the pthreads programming model for programming this HMC. We experimentally compare CCSVM/xthreads to a state-of-the-art CPU/GPU...
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