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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 4 (Page No. 429)
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Explain the tradeoffs between precise and imprecise interrupts on a superscalar machine.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 37 (Page No. 432)
The clock interrupt handler on a certain computer requires $2\: msec$ (including process switching overhead) per clock tick. The clock runs at $60\: Hz.$ What fraction of the CPU is devoted to the clock?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 10 (Page No. 430)
In Fig. 5-9(b), the interrupt is not acknowledged until after the next character has been output to the printer. Could it have equally well been acknowledged right at the start of the interrupt service procedure? If so, give one reason for doing it at the end, as in the text. If not, why not?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 9 (Page No. 430)
CPU architects know that operating system writers hate imprecise interrupts. One way to please the OS folks is for the CPU to stop issuing new instructions when an interrupt is signaled, but allow all the ... executed to finish, then force the interrupt. Does this approach have any disadvantages? Explain your answer.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 8 (Page No. 430)
Suppose that a computer can read or write a memory word in $5 nsec.$ Also suppose that when an interrupt occurs, all $32$ CPU registers, plus the program counter and PSW are pushed onto the stack. What is the maximum number of interrupts per second this machine can process?
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