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Computer Science The total ISR instruction count for interrupt A, interrupt B, and interrupt C are 75, 105, and 80 instructions, respectively. Interrupt A occurs thrice as often as interrupt B, while interrupt C is called once whenever the other interrupts are called. If our microcontroller executes 60 million instructions per second and the combined CPU percentage of the three interrupts is 10% assuming they do not interrupt each other. What is the CPU overhead of interrupt A alone? (Answer as a percentage rounded off to two decimal places e.g. 12.345% is entered as 12.35) A timer was configured to generate an interrupt with a prescaler of 8 and a period register of 311. The ISR for the timer interrupt takes 73 instruction cycles in total, including context save and restore. If the instruction frequency is 8 MHz and the timer operates continuously, what is the percentage of CPU time used for the ISR? Note: Assume 1 additional cycle between timer rollovers and answer in percentage rounded off to 3 decimal places (e.g. 9.3258% is entered as 9.326 below).

Computer Science The total ISR instruction count for interrupt A, interrupt B, and interrupt C are 75, 105, and 80 instructions, respectively. Interrupt A occurs thrice as often as interrupt B, while interrupt C is called once whenever the other interrupts are called. If our microcontroller executes 60 million instructions per second and the combined CPU percentage of the three interrupts is 10% assuming they do not interrupt each other. What is the CPU overhead of interrupt A alone? (Answer as a percentage rounded off to two decimal places e.g. 12.345% is entered as 12.35) A timer was configured to generate an interrupt with a prescaler of 8 and a period register of 311. The ISR for the timer interrupt takes 73 instruction cycles in total, including context save and restore. If the instruction frequency is 8 MHz and the timer operates continuously, what is the percentage of CPU time used for the ISR? Note: Assume 1 additional cycle between timer rollovers and answer in percentage rounded off to 3 decimal places (e.g. 9.3258% is entered as 9.326 below).

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Computer Science The total ISR instruction count for interrupt A, interrupt B, and interrupt C are 75, 105, and 80 instructions, respectively. Interrupt A occurs thrice as often as interrupt B, while interrupt C is called once whenever the other interrupts are called. If our microcontroller executes 60 million instructions per second and the combined CPU percentage of the three interrupts is 10% assuming they do not interrupt each other. What is the CPU overhead of interrupt A alone? (Answer as a percentage rounded off to two decimal places e.g. 12.345% is entered as 12.35) A timer was configured to generate an interrupt with a prescaler of 8 and a period register of 311. The ISR for the timer interrupt takes 73 instruction cycles in total, including context save and restore. If the instruction frequency is 8 MHz and the timer operates continuously, what is the percentage of CPU time used for the ISR? Note: Assume 1 additional cycle between timer rollovers and answer in percentage rounded off to 3 decimal places (e.g. 9.3258% is entered as 9.326 below).
Transcribed Image Text:Computer Science The total ISR instruction count for interrupt A, interrupt B, and interrupt C are 75, 105, and 80 instructions, respectively. Interrupt A occurs thrice as often as interrupt B, while interrupt C is called once whenever the other interrupts are called. If our microcontroller executes 60 million instructions per second and the combined CPU percentage of the three interrupts is 10% assuming they do not interrupt each other. What is the CPU overhead of interrupt A alone? (Answer as a percentage rounded off to two decimal places e.g. 12.345% is entered as 12.35) A timer was configured to generate an interrupt with a prescaler of 8 and a period register of 311. The ISR for the timer interrupt takes 73 instruction cycles in total, including context save and restore. If the instruction frequency is 8 MHz and the timer operates continuously, what is the percentage of CPU time used for the ISR? Note: Assume 1 additional cycle between timer rollovers and answer in percentage rounded off to 3 decimal places (e.g. 9.3258% is entered as 9.326 below).
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