Chapter 28
Waiting for Time
This chapter is a case study of time delays. Unlike the other case-study chapters, there is no specific program to study, but we will examine some unexpected execution dynamics.
From our framework, this chapter is about not running while waiting for a timer interrupt. A process may block waiting for a timer in order to run at periodic intervals or specific times of day, to have a timeout that checks on some other process running too long, to do timeslicing, or to have a required delay accessing some external hardware.
Many programs need to wait for a certain amount of time to pass before continuing, even though this may seem counterproductive from a performance point of view.
28.1 Periodic Work
Some processes, ...
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