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- W2895519740 abstract "General Purpose GPU computing (GPGPU) plays an increasingly vital role in high performance computing and other areas like deep learning. However, arising from the SIMD execution model, the branch divergence issue lowers efficiency of conditional branching on GPUs, and hinders the development of GPGPU. To achieve runtime on-the-spot branch divergence reduction, we propose the first on-GPU thread-data remapping scheme. Before kernel launching, our solution inserts codes into GPU kernels immediately before each target branch so as to acquire actual runtime divergence information. GPU software threads can be remapped to datasets multiple times during single kernel execution. We propose two thread-data remapping algorithms that are tailored to the GPU architecture. Effective on two generations of GPUs from both NVIDIA and AMD, our solution achieves speedups up to 2.718 with third-party benchmarks. We also implement three GPGPU frontier benchmarks from areas including computer vision, algorithmic trading and data analytics. They are hindered by more complex divergence coupled with different memory access patterns, and our solution works better than the traditional thread-data remapping scheme in all cases. As a compiler-assisted runtime solution, it can better reduce divergence for divergent applications that gain little acceleration on GPUs for the time being." @default.
- W2895519740 created "2018-10-12" @default.
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- W2895519740 date "2018-09-30" @default.
- W2895519740 modified "2023-10-01" @default.
- W2895519740 title "On-GPU Thread-Data Remapping for Branch Divergence Reduction" @default.
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- W2895519740 doi "https://doi.org/10.1145/3242089" @default.
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