Galvin Edition 9 Exercise 9 Question 15 (Page No. 452)

Question

A simplified view of thread states is $Ready$, $Running$, and $Blocked$,where a thread is either ready and waiting to be scheduled, is running on the processor, or is blocked (for example, waiting for I/O). This is illustrated in Figure 9.31. Assuming a thread is in the Running state, answer the following questions, and explain your answer:

a. Will the thread change state if it incurs a page fault? If so, to what state will it change?
b. Will the thread change state if it generates a $TLB$ miss that is resolved in the page table ? If so, to what state will it change?
c. Will the thread change state if an address reference is resolved in the page table? If so, to what state will it change?

Answer 1

A. On a page fault the thread state is set to blocked as an I/O operation is required to bring the new
page into memory.
B. On a TLB-miss, the thread continues running if the address is resolved in the page table.
C. The thread will continue running if the address is resolved in the page table.

Ref:

CHAPTER 9