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- W1498400246 abstract "Data is often communicated from different locations in application memory and is commonly serialized (copied) to send buffers or from receive buffers. MPI datatypes are a way to avoid such intermediate copies and optimize communications, however, it is often unclear which implementation and optimization choices are most useful in practice. We extracted the send/recv-buffer access pattern of a representative set of scientific applications into micro-applications that isolate their data access patterns. We also observed that the buffer-access patterns in applications can be categorized into three different groups. Our micro-applications show that up to 90% of the total communication time can be spent with local serialization and we found significant performance discrepancies between state-of-the-art MPI implementations. Our micro-applications aim to provide a standard benchmark for MPI datatype implementations to guide optimizations similarly to SPEC CPU and the Livermore loops do for compiler optimizations." @default.
- W1498400246 created "2016-06-24" @default.
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- W1498400246 date "2012-01-01" @default.
- W1498400246 modified "2023-09-27" @default.
- W1498400246 title "Micro-applications for Communication Data Access Patterns and MPI Datatypes" @default.
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- W1498400246 doi "https://doi.org/10.1007/978-3-642-33518-1_17" @default.
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