S4595-openacc-openmp4-apps-gpu-xeon-phi

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Outline• OpenACC2 and OpenMP4• Systematic Optimizations to PortablePerformance on GPU and Xeon Phi• Summary14
Performance Portability• Includes source code portability of a kernelimplementation and performance that iscommensurate with a device-specificimplementation of that kernel [Kokks]• Portability for Accelerators used in HPC– Different accelerators: GPU V.S. Xeon Phi– Different generations: Kepler V.S. Fermi– Different versions: K20 V.S. K4015
Page 1 and 2: 2014@San JoseShanghai Jiao Tong Un
Page 3 and 4: Why Direc>ve-‐based Programmi
Page 5 and 6: OpenACC2• Standard version evolut
Page 7 and 8: OpenACC2Parallel KernelDataLoopHost
Page 9 and 10: HOMP, OpenMP compiler for CUDA
Page 13: Performance impact of K40 and
Page 17 and 18: Op>miza>on for Portable Performa
Page 19 and 20: Shared Memory/L2 (SHMEM) Level
Page 21 and 22: SIMD Friendly Algorithm [ISCA12]
Page 24 and 25: Outline• OpenACC2 and OpenMP4•

S4595-openacc-openmp4-apps-gpu-xeon-phi

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