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Answer the following questions

[问答题]

Answer the following questions using the banker's algorithm:
a. What is the content of the matrix Need?
b. Is the system in a safe state?
c. If a request from process PI arrives for (0,4,2,0), can the request be granted immediately?

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a.What is the content of the matrix Need? The values of Need for processes PO through P4 respectively are (0,0,0,0), (0, 7, 5, 0), (1, 0,0, 2),

(0,0, 2, 0), and (0, 6, 4, 2).
b.Is the system in a safe state? Yes. With Available being equal to (1, 5, 2, 0), either process P0 or P3 could run. Once process P3 runs, it releases its resources which allow all other existing processes to run.
c.If a request from process P1 arrives for (0,4,2,0), can the request be granted immediately? Yes it can. This results in the value of Available being (1, 1, 0,0). One ordering of processes that can finish is P0, P2, P3, P1, and P4

发表于 2018-03-23 22:06:57 回复(0)