Operating Systems Principles and Practice, Volume 2: Concurrency by Anderson Thomas & Dahlin Michael

Author:Anderson, Thomas & Dahlin, Michael
Language: eng
Format: epub
ISBN: 9780985673543
Publisher: Recursive Books
Published: 2015-08-30T16:00:00+00:00

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In the previous chapter, we described a key building block for writing concurrent programs: how to design an object that can be shared between multiple threads. In this chapter, we need to go one step further: what happens as programs become more complex, with multiple shared objects and multiple locks? To answer this, we need to reason about the interactions between shared objects.

Several considerations arise in this context:

Multiprocessor performance. Modern computers have increasing numbers of processors because of the difficulty of improving single CPU performance. The design of shared objects can have a large impact on multiprocessor performance. For example, a lock protecting a frequently accessed shared object can become a bottleneck, since only one thread can hold the lock at a time.

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