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1. What must a kernel provide for an effective user-level thread implementation?
2. With respect to the quantum q in a scheduling algorithm, explain and discuss the impact of the following on the operating system:
a) q is fixed and identical for all users.
b) q is fixed and unique to each user.
c) q is variable and identical for all users.
d) q is variable and unique to a each user.
3. Arrange the above schemes in question 2 from lowest to highest run-time overhead. Explain your answer.
4. Arrange the above schemes in question 2 from least to most responsive to variations in individual processes and system load. Explain you answer.
short note on context switching
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Translation Look aside Buffer In a cached system, the base addresses of the last few indexed pages is maintained in registers named the TLB that adds in faster lookup. TLB has
Q. We have stressed the require for an operating system to make efficient use of the computing hardware. When is it suitable for the operating system to forsake this principle and
reasons for process termination
The optimal replacement policy, called OPT, is to evict the page which will be accessed farthest into the future. Since we can't predict the future precisely, we can't implement OP
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For example, by initializing a semaphore to 0, threads can wait for an event to occur, and impose an ordering constraint, similar to a monitor using condition variables, but with m
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