Synchronization issues of the parallel A Star Search
Name
46988178-MIT.pdf
Description
Full printable version
Size
1.44 MB
Format
Adobe PDF
Checksum (MD5)
7f058d53b0ec14fb48f7867adca5e2a3
Author(s)
Daly, Daniel Cameron
Advisor(s)
Dimitri P. Bertsekas and Ed. Leung.
Alternative Title
Synchronization issues of the parallel A* Search
Date Issued
1994
Publisher
Massachusetts Institute of Technology
Abstract
An experimental study was carried out on the performance of synchronous and asynchronous implementations of the A* Search on a multiprocessor network. Master-Slave parallelism was used to distribute the Search among the 8 processor nodes of a transputer network. The test programs were run on 4 different types of maps. Measurements were taken in the form of percentages of time spent in computation and communication in each cycle of the search as an artificial delay in the computation phase was increased. The results from the map tests showed that the asynchronous implementation spent a larger percentage of each cycle performing calculations rather than communicating or waiting for communications as the artificial delay was increased. This means that the efficiency of the asynchronous approach increases more rapidly than the efficiency of the synchronous approach as the computational complexity of a parallel program is increased. This was found to be true for all artificial delays on all test maps for the Master-Slave A* Search. The results might vary with different implementations and search methodologies.
Description
Thesis (B.S. and M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 1994.
Includes bibliographical references (leaf 29).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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