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441
Galvin Edition 9 Exercise 5 Question 3 (Page No. 243)
What is the meaning of the term busy waiting ? What other kinds of waiting are there in an operating system ? Can busy waiting be avoided altogether ? Explain your answer.
What is the meaning of the term busy waiting ? What other kinds of waiting are there in an operating system ? Can busy waiting be avoided altogether ? Explain your answer...
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443
Galvin Edition 9 Exercise 5 Question 1 (Page No. 242)
disabling interrupts frequently can affect the system’s clock. Explain why this can occur and how such effects can be minimized.
disabling interrupts frequently can affect the system’s clock. Explain why this can occur and how such effects can be minimized.
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3 answers
444
Galvin Edition 9 Exercise 4 Question 15 (Page No. 193)
Consider the following code segment: pid t pid; pid = fork(); if (pid == 0) { /* child process */ fork(); thread create( . . .); } fork(); a. How many unique processes are created? b. How many unique threads are created?
Consider the following code segment:pid t pid; pid = fork(); if (pid == 0) { /* child process */ fork(); thread create( . . .); } fork();a. How many unique processes are ...
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1 answer
446
Galvin Edition 9 Exercise 4 Question 12 (Page No. 192)
Using Amdahl’s Law, calculate the speedup gain of an application that has a 60 percent parallel component for (a) two processing cores and (b) four processing cores.
Using Amdahl’s Law, calculate the speedup gain of an application that has a 60 percent parallel component for (a) two processing cores and (b) four processing cores.
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1 answer
447
Galvin Edition 9 Exercise 4 Question 11 (Page No. 192)
Is it possible to have concurrency but not parallelism ? Explain.
Is it possible to have concurrency but not parallelism ? Explain.
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2 answers
448
Galvin Edition 9 Exercise 4 Question 9 (Page No. 192)
Can a multithreaded solution using multiple user-level threads achieve better performance on a multiprocessor system than on a single processor system ? Explain.
Can a multithreaded solution using multiple user-level threads achieve better performance on a multiprocessor system than on a single processor system ? Explain.
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1 answer
449
Galvin Edition 9 Exercise 4 Question 8 (Page No. 192)
Which of the following components of program state are shared across threads in a multithreaded process ? a. Register values b. Heap memory c. Global variables d. Stack memory
Which of the following components of program state are shared across threads in a multithreaded process ?a. Register valuesb. Heap memoryc. Global variablesd. Stack memor...
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450
Galvin Edition 9 Exercise 4 Question 7 (Page No. 192)
Under what circumstances does a multithreaded solution using multiple kernel threads provide better performance than a single-threaded solution on a single-processor system ?
Under what circumstances does a multithreaded solution using multiple kernel threads provide better performance than a single-threaded solution on a single-processor syst...
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451
Galvin Edition 9 Exercise 4 Question 6 (Page No. 192)
Provide two programming examples in which multithreading does not provide better performance than a single-threaded solution.
Provide two programming examples in which multithreading does not provide better performance than a single-threaded solution.
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453
Galvin Edition 9 Exercise 4 Question 4 (Page No. 191)
What resources are used when a thread is created ? How do they differ from those used when a process is created ?
What resources are used when a thread is created ? How do they differ from those used when a process is created ?
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454
Galvin Edition 9 Exercise 4 Question 3 (Page No. 191)
Describe the actions taken by a kernel to context-switch between kernel level threads.
Describe the actions taken by a kernel to context-switch between kernel level threads.
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1 answer
455
Galvin Edition 9 Exercise 4 Question 2 (Page No. 191)
What are two differences between user-level threads and kernel-level threads ? Under what circumstances is one type better than the other ?
What are two differences between user-level threads and kernel-level threads ? Under what circumstances is one type better than the other ?
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456
Galvin Edition 9 Exercise 4 Question 1 (Page No. 191)
Provide two programming examples in which multithreading provides better performance than a single-threaded solution.
Provide two programming examples in which multithreading provides better performance than a single-threaded solution.
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459
Galvin Edition 9 Exercise 3 Question 16 (Page No. 153)
Consider the RPC mechanism. Describe the undesirable consequences that could arise from not enforcing either the “at most once” or “exactly once” semantic. Describe possible uses for a mechanism that has neither of these guarantees.
Consider the RPC mechanism. Describe the undesirable consequences that could arise from not enforcing either the “at most once” or “exactly once” semantic. Descri...
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460
Galvin Edition 9 Exercise 3 Question 15 (Page No. 153)
Give an example of a situation in which ordinary pipes are more suitable than named pipes and an example of a situation in which named pipes are more suitable than ordinary pipes.
Give an example of a situation in which ordinary pipes are more suitable than named pipes and an example of a situation in which named pipes are more suitable than ordina...
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