Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 28 Aug 2017 My Price 6.00

memory Mvia

A computer consists of a CPU and an I/O device D connected to main memory Mvia a shared bus with a data bus width of one word. The CPU can execute a maximum of 106 instructions per second. An average instruction requires five processor cycles, three of which use the memory bus. A memory read or writes operation uses one processor cycle. Suppose that the CPU is continuously executing ?obackground?? programs that require 95% of its instruction execution rate but not any I/O instructions. Assume that one processor cycle equals one bus cycle. Now suppose that very large blocks of data are to be transferred between M and D.
a. If programmed I/O is used and each one-word I/O transfer requires the CPU to execute two instructions, estimate the maximum I/O data transfer rate, in words per second, possible through D.
b. Estimate the same rate if DMA transfer is used.

Answers

Maurice Tutor
(5)
Status NEW Posted 28 Aug 2017 01:08 PM My Price 6.00

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