UPC++ Programmer’s Guide, v1.0-2018.3.0

Technical Report · Sat Mar 31 00:00:00 EDT 2018

DOI:https://doi.org/10.2172/1430693· OSTI ID:1430693

Bachan, J. ^[1]; Baden, S. ^[1]; Bonachea, Dan ^[1]; Hargrove, Paul H. ^[1]; Hofmeyr, S. ^[1]; Ibrahim, Khaled ^[1]; Jacquelin, M. ^[1]; Kamil, A. ^[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 thread of execution (referred to as a rank, a term borrowed from MPI) 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 ranks. 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 Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1430693
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING