GATE (Graduate Aptitude Test in Engineering) Computer Science & IT (CS) Operating System-CPU Scheduling Study Material (Page 2 of 3)

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Mutual Exclusion Possible Solutions: Hardware Solutions

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Mutual Exclusion Possible Solutions -

  • Mutual exclusion is now back again. Now there both software and hardware solutions for enforcing mutual exclusion. Let us see some of them,

Hardware Solutions

  • These are not the preferred route for providing the solution to Mutual exclusion. On the uniprocessor systems, the simplest solution to achieve mutual exclusion is to disable interrupts during a process՚s critical section. This will prevent any interrupt service routines from springing up. However, if the critical section happens to be “lengthy” , then the system would simply drift. The system can hang up too if the process hal…

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CPU Scheduling (Multiple-Processor Scheduling) : Approaches to Multiple-Processor Scheduling, Processor Affinity, Load Balancing, Multicore Processors

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CPU Scheduling (Multiple-Processor Scheduling)

In multiple-processor scheduling multiple CPU՚s are available and hence Load Sharing becomes possible. However multiple processor scheduling is more complex as compared to single processor scheduling. In multiple processor scheduling there are cases when the processors are identical in terms of their functionality, we can use any processor available to run any process in the queue.

Approaches to Multiple-Processor Scheduling

One approach is when all the scheduling decisions and I/O processing are ha…

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