Abstract
SHMEM is an important and popular Partitioned Global Address Space (PGAS) programming model. The OpenSHMEM API Specification Version 1.2 defines a SHMEM programming model and there are many implementations of at least most of the specification. This paper presents extensions to this API that can improve ease of programming and provide more opportunities for implementors to improve performance. Some of these features are particularly important for performance on heterogeneous system architectures with architectural features such as multi-core processors, processor accelerators, distributed memory, and heterogeneous memories. The new features described in this paper are: Alltoall Collectives, Flexible PE Subsets, Thread-Safety, Local Shared Memory Pointers, Put With Signal, and Non-blocking Put and Get. The benefits of each of these features in terms of ease of programming or program performance are also described.
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Acknowledgement
The authors wish to acknowledge the Cray Inc. employees who worked on the design and implementation of these proposed extensions to OpenSHMEM: Monika ten Bruggencate, Kim McMahon, Steve Oyanagi, and Nick Radcliffe.
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Knaak, D., Namashivayam, N. (2015). Proposing OpenSHMEM Extensions Towards a Future for Hybrid Programming and Heterogeneous Computing. In: Gorentla Venkata, M., Shamis, P., Imam, N., Lopez, M. (eds) OpenSHMEM and Related Technologies. Experiences, Implementations, and Technologies. OpenSHMEM 2014. Lecture Notes in Computer Science(), vol 9397. Springer, Cham. https://doi.org/10.1007/978-3-319-26428-8_4
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DOI: https://doi.org/10.1007/978-3-319-26428-8_4
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