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17. Suppose there is a process with three threads that use the same amount of time...

17. Suppose there is a process with three threads that use the same amount of time to execute. Thread 1 spends 50% of its time waiting on I/O. Thread 2 spends 10% of its time waiting for information from Thread 1. Thread 3 spends 10% of it's time waiting for information from thread 2. How much of a speedup will there be if the threads are implemented as kernel-level threads on 2 processors as apposed to user-level threads?

a. A factor of 1.67

b. A factor of 1.88

c. A factor of 1.95

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Answer #1

Ans: A factor of 1.88

Explanation: User threads are faster than kernel-level thread but because of two processer speedup is increased

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