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- W3009969478 abstract "Summary High‐performance computing relies on accelerators (such as GPGPUs) to achieve fast execution of scientific applications. Traditionally, these accelerators have been programmed with specialized languages, such as CUDA or OpenCL. In recent years, OpenMP emerged as a promising alternative for supporting accelerators, providing advantages such as maintaining a single code base for the host and different accelerator types and providing a simple way to extend support for accelerators to existing application codes. Efficiently using this support requires solving several challenges, related to performance, work partitioning, and concurrent execution on multiple device types. In this article, we discuss our experiences with using OpenMP for accelerators and present performance guidelines. We also introduce a library, Hydra, that addresses several of the challenges of using OpenMP for such devices. We apply Hydra to a scientific application, PlasCom2, that has not previously been able to use accelerators. Experiments on three architectures show that Hydra results in performance gains of up to 10× compared with CPU‐only execution. Concurrent execution on the host and GPU resulted in additional gains of up to 20% compared to running on the GPU only." @default.
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- W3009969478 date "2020-03-07" @default.
- W3009969478 modified "2023-09-26" @default.
- W3009969478 title "Heterogeneous computing with OpenMP and Hydra" @default.
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- W3009969478 doi "https://doi.org/10.1002/cpe.5728" @default.
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