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While GPUs are becoming common in HPC systems, the CPU is still responsible for managing both GPU-side and CPU-side compute, communication, and synchronization operations. For instance, if a result from a GPU-side computation is to be transferred to a remote destination, then the CPU must synchronize on GPU compute completion issuing a communication operation. Both CPU cycles and energy are consumed...
GPUDirect RDMA (GDR) brings the high-performance communication capabilities of RDMA networks like InfiniBand (IB) to GPUs (referred to as "Device"). It enables IB network adapters to directly write/read data to/from GPU memory. Partitioned Global Address Space (PGAS) programming models, such as OpenSHMEM, provide an attractive approach for developing scientific applications with irregular...
Message Passing Interface (MPI) has been the defacto programming model for scientific parallel applications. However, data driven applications with irregular communication patterns are harder to implement using MPI. The Partitioned Global Address Space (PGAS) programming models present an alternative approach to improve programmability. PGAS languages like UPC are growing in popularity because of...
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