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DOE OSTI · 1604742

UPC++ v1.0 Programmer’s Guide, Revision 2020.3.0

Bachan, John·Baden, Scott·Bonachea, Dan·Grossman, Max·Hargrove, Paul·Hofmeyr, Steven·Jacquelin, Mathias·Kamil, Amir·Van Straalen, B.
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Abstract

UPC++ is a C++11 library that provides Partitioned Global Address Space (PGAS) programming. It is designed for writing parallel programs that run efficiently and scale well on distributed-memory parallel computers. The PGAS model is single program, multiple-data (SPMD), with each separate constituent process having access to local memory as it would in C++. However, PGAS also provides access to a global address space, which is allocated in shared segments that are distributed over the processes. UPC++ provides numerous methods for accessing and using global memory. In UPC++, all operations that access remote memory are explicit, which encourages programmers to be aware of the cost of communication and data movement. Moreover, all remote-memory access operations are by default asynchronous, to enable programmers to write code that scales well even on hundreds of thousands of cores.

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Bachan, John, Baden, Scott, Bonachea, Dan, Grossman, Max, Hargrove, Paul, Hofmeyr, Steven, Jacquelin, Mathias, Kamil, Amir, Van Straalen, B.. 2020-03-12. UPC++ v1.0 Programmer’s Guide, Revision 2020.3.0. https://doi.org/10.25344/s4p88z

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