Computers and Technology, 03.06.2021 01:40 isaacbrown7one
Polling vs interrupts. A program is outputting a series of blocks by repeatedly issuing an I/O instruction. β’ Executing the I/O instruction takes 1 unit of CPU time. All other instructions take 0 units of time. β’ The device starts at the end of the I/O instruction and remains busy for 6 time units. β’ When polling is used, the CPU polls the device every 5 time units. β’ A poll takes 1 unit of CPU time. β’ When interrupts are used, the interrupt handler takes 3 time units to process the interrupt.
Draw a timing diagram showing when the CPU and the device are busy during the first 24 time units
1. with polling
2. with interrupts
Answers: 3
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Polling vs interrupts. A program is outputting a series of blocks by repeatedly issuing an I/O instr...
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