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1711
Galvin Edition 9 Exercise 5 Question 13 (Page No. 244)
Describe two kernel data structures in which race conditions are possible.Be sure to include a description of how a race condition can occur.
Describe two kernel data structures in which race conditions are possible.Be sure to include a description of how a race condition can occur.
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1712
Galvin Edition 9 Exercise 5 Question 12 (Page No. 244)
The Linux kernel has a policy that a process cannot hold a spin lock while attempting to acquire a semaphore. Explain why this policy is in place.
The Linux kernel has a policy that a process cannot hold a spin lock while attempting to acquire a semaphore. Explain why this policy is in place.
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1713
Galvin Edition 9 Exercise 5 Question 11 (Page No. 244)
Explain why interrupts are not appropriate for implementing synchronization primitives in multiprocessor systems.
Explain why interrupts are not appropriate for implementing synchronization primitives in multiprocessor systems.
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1714
Galvin Edition 9 Exercise 5 Question 10 (Page No. 243)
Explain why implementing synchronization primitives by disabling interrupts is not appropriate in a single-processor system if the synchronization primitives are to be used in user-level programs.
Explain why implementing synchronization primitives by disabling interrupts is not appropriate in a single-processor system if the synchronization primitives are to be us...
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1719
Galvin Edition 9 Exercise 5 Question 5 (Page No. 243)
Show that, if the $wait()$ and $signal()$ semaphore operations are not executed atomically, then mutual exclusion may be violated.
Show that, if the $wait()$ and $signal()$ semaphore operations are not executed atomically, then mutual exclusion may be violated.
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1720
Galvin Edition 9 Exercise 5 Question 4 (Page No. 243)
Explain why spin locks are not appropriate for single-processor systems yet are often used in multiprocessor systems.
Explain why spin locks are not appropriate for single-processor systems yet are often used in multiprocessor systems.
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1721
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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1723
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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1725
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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1727
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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1728
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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1729
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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1731
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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1732
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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1733
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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1734
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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1737
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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1738
Galvin Edition 9 Exercise 3 Question 11 (Page No. 152)
Explain the role of the init process on UNIX and Linux systems in regard to process termination.
Explain the role of the init process on UNIX and Linux systems in regard to process termination.
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