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Improving efficiency of a global barrier operation in a parallel computer

United States Patent

October 4, 2016
View the Complete Patent at the US Patent & Trademark Office
Performing a global barrier operation in a parallel computer that includes compute nodes coupled for data communications, where each compute node executes tasks, with one task on each compute node designated as a master task, including: for each task on each compute node until all master tasks have joined a global barrier: determining whether the task is a master task; if the task is not a master task, joining a single local barrier; if the task is a master task, joining the global barrier and the single local barrier only after all other tasks on the compute node have joined the single local barrier.
Archer; Charles J. (Rochester, MN), Blocksome; Michael A. (Rochester, MN), Ratterman; Joseph D. (Seattle, WA), Smith; Brian E. (Knoxville, TN)
International Business Machines Corporation (Armonk, NY)
13/ 683,726
November 21, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Contract No. B554331 awarded by the Department of Energy. The government has certain rights in this invention.