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This paper extends an earlier out-of-core Fast Fourier Transform (FFT)
method for a uniprocessor with the Parallel Disk Model (PDM) to use
multiple processors. Four out-of-core multiprocessor methods are
examined. Operationally, these methods differ in the size of
"mini-butterfly" computed in memory and how the data are organized on
the disks and in the distributed memory of the multiprocessor. The
methods also perform differing amounts of I/O and communication. Two
of them have the remarkable property that even though they are
computing the FFT on a multiprocessor, all interprocessor
communication occurs outside the mini-butterfly computations.
Performance results on a small workstation cluster indicate that
except for unusual combinations of problem size and memory size, the
methods that do not perform interprocessor communication during the
mini-butterfly computations require approximately 86% of the time of
those that do. Moreover, the faster methods are much easier to
Revised version appeared in IOPADS '97.
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
Thomas H. Cormen, Jake Wegmann, and David M. Nicol, "Multiprocessor Out-of-Core FFTs with Distributed Memory and Parallel Disks." Dartmouth Computer Science Technical Report PCS-TR97-303, January 1997.
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