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- W2224946430 abstract "Barriers are a fundamental synchronization primitive, underpinning the parallel execution models of many modern shared-memory parallel programming languages such as OpenMP, OpenCL or Cilk, and are one of the main challenges to scaling. State-of-the-art barrier synchronization algorithms differ in tradeoffs between critical path length, communication traffic patterns and memory footprint. In this paper, we evaluate the efficiency of five such algorithms on the Intel Xeon Phi coprocessor. In addition, we present a novel hybrid barrier implementation that exploits the topology, the memory hierarchy and streaming stores of the Xeon Phi architecture to achieve a 3 $$times $$ lower overhead than the Intel OpenMP barrier implementation (ICC 14.0.0), thus outperforming, to the best of our knowledge, all other implementations, and which we evaluate on the CG and MG kernels from the NAS Parallel Benchmarks, the direct N-body simulation kernel and the EPCC barrier OpenMP microbenchmark. The optimized barriers presented in the paper are available at https://github.com/arodchen/cbarriers released as free software." @default.
- W2224946430 created "2016-06-24" @default.
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- W2224946430 date "2015-01-01" @default.
- W2224946430 modified "2023-09-30" @default.
- W2224946430 title "Effective Barrier Synchronization on Intel Xeon Phi Coprocessor" @default.
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- W2224946430 doi "https://doi.org/10.1007/978-3-662-48096-0_45" @default.
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