Hyper Dictionary

English Dictionary Computer Dictionary Video Dictionary Thesaurus Dream Dictionary Medical Dictionary


Search Dictionary:  

Meaning of PRIORITY SCHEDULING

 
Computing Dictionary
 
 Definition: 

processes scheduling in which the scheduler selects tasks to run based on their priority as opposed to, say, a simple round-robin.

Priorities may be static or dynamic. Static priorities are assigned at the time of creation, while dynamic priorities are based on the processes' behaviour while in the system. For example, the scheduler may favour i/o-intensive tasks so that expensive requests can be issued as early as possible.

A danger of priority scheduling is starvation, in which processes with lower priorities are not given the opportunity to run. In order to avoid starvation, in preemptive scheduling, the priority of a process is gradually reduced while it is running. Eventually, the priority of the running process will no longer be the highest, and the next process will start running. This method is called aging.

 

 

COPYRIGHT © 2000-2013 HYPERDICTIONARY.COM HOME | ABOUT HYPERDICTIONARY