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

Technical Report · Thu Mar 12 00:00:00 EDT 2020

DOI:https://doi.org/10.25344/S4P88Z· OSTI ID:1604742

Bachan, John ^[1]; Baden, Scott ^[1]; Bonachea, Dan ^[1]; Grossman, Max ^[1]; Hargrove, Paul ^[1]; Hofmeyr, Steven ^[1]; Jacquelin, Mathias ^[1]; Kamil, Amir ^[1]; Van Straalen, B. ^[1]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1604742
• Report Number(s): LBNL-2001269; ark:/13030/qt6j06n284
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING