Aligning parallel arrays to reduce communication

Aligning parallel arrays to reduce communication (1995)

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by Thomas J. Sheffler , Robert Schreiber , John R. Gilbert , Siddhartha Chatterjee

Venue:	IN FRONTIERS '95: THE 5TH SYMP. ON THE FRONTIERS OF MASSIVELY PARALLEL COMPUTATION
Citations:	16 - 1 self

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Datum	Value	Source
TITLE	Aligning parallel arrays to reduce communication	INFERENCE
AUTHOR NAME	Thomas J. Sheffler	user correction
AUTHOR AFFIL	The Research Institute for Advanced Computer Science is operated by Universities Space Research	user correction
AUTHOR ADDR	Association, The American City Building, Suite 212, Columbia, MD 21044, (410) 730-2656	user correction
AUTHOR NAME	Robert Schreiber	user correction
AUTHOR NAME	John R. Gilbert	user correction
AUTHOR NAME	Siddhartha Chatterjee	user correction
AUTHOR AFFIL	Science (RIACS), NASA Ames Research Center	user correction
AUTHOR ADDR	Moffett Field, CA 94035-1000.	user correction
ABSTRACT	Axis and stride alignment is an important optimization in compiling data-parallel programs for distributed-memory machines. We previously developed an optimal algorithm for aligning array expressions. Here, we examine alignment for more general program graphs. We show that optimal alignment is NP-complete in this setting, so we study heuristic methods. This paper makes two contributions. First, we show how local graph transformations can reduce the size of the problem significantly without changing the best solution. This allows more complex and effective heuristics to be used. Second, we give aheuristic that can explore the space of possible solutions in a number of ways. We show that some of these strategies can give better solutions than a simple greedy approach proposed earlier. Our algorithms have been implemented; we present experimental results showing their effect on the performance of some example programs running on the CM-5.	user correction
YEAR	1995	INFERENCE
VENUE	IN FRONTIERS '95: THE 5TH SYMP. ON THE FRONTIERS OF MASSIVELY PARALLEL COMPUTATION	user correction
VENUE TYPE	CONFERENCE	INFERENCE
PAGES	324--331	INFERENCE
CITATIONS	10 found	ParsCit 1.0