In our load balancing discussion, we described how processors decide when and with whom to migrate a process. However, we did not describe how processors decide which process to migrate. Suggest some factors that could help determine which process to migrate.
What will be an ideal response?
Communication links should be considered. Processes that do not communicate much
with other processes at the sending node (or do communicate with processes at the receiving
node) are good candidates for migration, whereas processes that communicate with a number
of processes at the sending node should not be migrated.The system also might consider
migrating groups of communicating processes. It should also consider what resources a process
needs and whether they are available at the receiving processor.Another heuristic could
be to send processor-bound processes, because these place more load on a processor than
interactive processes. Finally, the processor might want to migrate processes with little state
information so that migration is cheap.
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