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A Development of Fusion Processor Architecture for Efficient Main Memory Access in CPU-GPU Environment
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 Title & Authors
A Development of Fusion Processor Architecture for Efficient Main Memory Access in CPU-GPU Environment
Park, Hyun-Moon; Kwon, Jin-San; Hwang, Tae-Ho; Kim, Dong-Sun;
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The HSA resolves an old problem with existing CPU and GPU architectures by allowing both units to directly access each other`s memory pools via unified virtual memory. In a physically realized system, however, frequent data exchanges between CPU and GPU for a virtual memory block result bottlenecks and coherence request overheads. In this paper, we propose Fusion Processor Architecture for efficient access of main memory from both CPU and GPU. It consists of Job Manager, Re-mapper, and Pre-fetcher to control, organize, and distribute work loads and working areas for GPU cores. These components help on reducing memory exchanges between the two processors and improving overall efficiency by eliminating faulty page table requests. To verify proposed algorithm architectures, we develop an emulator based on QEMU, and compare several architectures such as CUDA(Compute Unified Device Architecture), OpenMP, OpenCL. As a result, Proposed fusion processor architectures show 198% faster than others by removing unnecessary memory copies and cache-miss overheads.
CPU-GPU;GPGPU;Uniform Memory Access;HSA;Fusion architecture;
 Cited by
CPU-GPU간 긴밀성을 위한 효율적인 공유메모리 접근 방법과 검증 시스템 구현,박현문;권진산;황태호;김동순;

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