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Related Flashcards
Cards In This Set
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What are the benefits to multithreaded programming?
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Responsiveness, resource sharing, economy, utilization of multiprocessor architecture.
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What multithreading's economy benefits?
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Creating a thread is less resource intensive as creating a new process.
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What is the many-to-one model?
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It is where many user threads maps to one kernel thread. only one user thread runs at a time.
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What is the many-to-many model?
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Many user threads are mapped to many kernel threads.
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What is the two-level model?
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It is an OS using both many-to-many and one-to-one model.
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What happens when a multithreaded program uses fork() and exec() that creates a new process?
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It depends on parameters used in exec(), when exec() is used and what parameter is in exec().
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What is a lightweight process?
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It is placed between a user thread and a kernel thread. it is dislike a process where it shares most infromation with other process. it is unlike a thread that it has its own identifier and parenthood relationship. To the user thread, LWP is a virtual processor.
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What is schedular acitivation?
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It is where the kernel thread creates an application with a number of LWPs and the application can schedule user threads to the virtual processor.
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What is the upcall and upcall handler.
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It is the kernel thread's way of sending what's going to happen up to the application and to the user thread.
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