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Pcb process control block - PowerPoint PPT Presentation

Signals (continued)

Signals (continued). CS 241 April 9, 2012 University of Illinois. Signals. A signal is an asynchronous notification of an event Asynchronous : could occur at any time Interrupts receiving process; jumps to signal handler in that process A (limited) menu of event types to pick from

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Interrupts

Interrupts. Signal that causes the CPU to alter its normal flow on instruction execution frees CPU from waiting for events provides control for external input Examples unexpected input abnormal situation illegal instructions multitasking, multiprocessing. Interrupt Terminology.

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Pcb process control block - PowerPoint PPT Presentation

Signals (continued)

Interrupts