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Global interrupt and barrier networks

United States Patent

October 28, 2008
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A system and method for generating global asynchronous signals in a computing structure. Particularly, a global interrupt and barrier network is implemented that implements logic for generating global interrupt and barrier signals for controlling global asynchronous operations performed by processing elements at selected processing nodes of a computing structure in accordance with a processing algorithm; and includes the physical interconnecting of the processing nodes for communicating the global interrupt and barrier signals to the elements via low-latency paths. The global asynchronous signals respectively initiate interrupt and barrier operations at the processing nodes at times selected for optimizing performance of the processing algorithms. In one embodiment, the global interrupt and barrier network is implemented in a scalable, massively parallel supercomputing device structure comprising a plurality of processing nodes interconnected by multiple independent networks, with each node including one or more processing elements for performing computation or communication activity as required when performing parallel algorithm operations. One multiple independent network includes a global tree network for enabling high-speed global tree communications among global tree network nodes or sub-trees thereof. The global interrupt and barrier network may operate in parallel with the global tree network for providing global asynchronous sideband signals.
Blumrich; Matthias A. (Ridgefield, CT), Chen; Dong (Croton-On-Hudson, NY), Coteus; Paul W. (Yorktown Heights, NY), Gara; Alan G. (Mount Kisco, NY), Giampapa; Mark E (Irvington, NY), Heidelberger; Philip (Cortlandt Manor, NY), Kopcsay; Gerard V. (Yorktown Heights, NY), Steinmacher-Burow; Burkhard D. (Mount Kisco, NY), Takken; Todd E. (Mount Kisco, NY)
International Business Machines Corporation (Armonk, NY)
10/ 468,997
February 25, 2002
This invention was made with Government support under subcontract number B517552 under prime contract number W-7405-ENG-48 awarded by the Department of Energy. The Government has certain fights in this invention.