An Analysis of Preemptive Multiprocessor Job Scheduling
Name
MIT-LCS-TM-110.pdf
Size
1.98 MB
Format
Adobe PDF
Checksum (MD5)
a8f4a5a31a2fdfe331264eac883ad93c
Author(s)
Jaffe, Jeffrey M.
Date Issued
September 1978
Series/Report no.
MIT-LCS-TM-110
Abstract
The preemptive scheduling of a partially ordered set of tasks is studied. A class of scheduling heuristics is introduced, and the performance of schedules in this class is analyzed with respect to the least finishing time optimality criterion. If there are m processors, then the finishing time of any schedule in the class is at most √m + (1/2) times worse than optimal, independent of the speeds of the processors. Examples are given which indicate that there are schedules whcih may be as bad as √m-1 times worse than optimal even for machines with one fast processor.
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