a) Suppose a processor scans the connected keyboard every 1000 µs. This system is controlledby an operator through commands entered from the keyboard. The average number of commandsentered in an 10-hour interval is 100. By what fraction would the number of processor visits to thekeyboard be reduced if interrupt-driven I/O were used?
a) Suppose a processor scans the connected keyboard every 1000 µs. This system is controlledby an operator through commands entered from the keyboard. The average number of commandsentered in an 10-hour interval is 100. By what fraction would the number of processor visits to thekeyboard be reduced if interrupt-driven I/O were used?
Chapter6: System Integration And Performance
Section: Chapter Questions
Problem 4RQ
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a) Suppose a processor scans the connected keyboard every 1000 µs. This system is controlled
by an operator through commands entered from the keyboard. The average number of commands
entered in an 10-hour interval is 100. By what fraction would the number of processor visits to the
keyboard be reduced if interrupt-driven I/O were used?
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