Abstract
When executing Fortran 90 style data-parallel array operations on distributed-memory multiprocessors, intraprocessor data movement due to shift operations can account for a significant fraction of the execution time. This paper describes a strategy for minimizing data movement caused by Fortran 90 CSHIFT operations and presents a compiler technique that exploits this strategy automatically. The compiler technique is global in scope and can reduce data movement even when a definition of an array and its uses are separated by control flow. This technique supersedes those whose scope is restricted to a single statement. We focus on the application of this strategy on distributed-memory architectures, although it is more broadly applicable.
This research supported in part by the NSF Cooperative Research Agreement Number CCR-9120008.
Supported in part by the IBM Corporation through the Graduate Resident Study Program.
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© 1996 Springer-Verlag Berlin Heidelberg
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Kennedy, K., Mellor-Crummey, J., Roth, G. (1996). Optimizing Fortran 90 shift operations on distributed-memory multicomputers. In: Huang, CH., Sadayappan, P., Banerjee, U., Gelernter, D., Nicolau, A., Padua, D. (eds) Languages and Compilers for Parallel Computing. LCPC 1995. Lecture Notes in Computer Science, vol 1033. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0014198
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DOI: https://doi.org/10.1007/BFb0014198
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