Issues in multiprogrammed multiprocessor scheduling

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University of Wisconsin--Madison, 1990 - Multiprocessors - 354 pages
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We also compare the policies under workloads that may be more realistic than previous studies have used. Using these new workloads, we arrive at different conclusions than reported in earlier work. In particular, we find that the 'smallest number of processes first' (SNPF) scheduling discipline performs poorly, even when the number of processes in a job is positively correlated with the total service demand of the job. We also find that policies that allocate an equal fraction of the processing power to each job in the system perform better than practical policies that allocate processing power unequally. We find that allocation of processing power among competing jobs is at least as important as explicit support for spin-lock and barrier synchronization.

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Contents

Scheduling Policies
26
Multiprocessor and Workload Models
43
NoSynchronization Results
57

4 other sections not shown

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