Interrupt-driven i/o to manage a single serial port, Operating System

Q. Why might a system utilize interrupt-driven I/O to manage a single serial port however polling I/O to manage a front-end processor such as a terminal concentrator?

Answer: Polling can be more proficient than interrupt-driven I/O. This is the situation when the I/O is frequent and of short duration. Although a single serial port will perform I/O relatively infrequently and should therefore use interrupts a collection of serial ports such as those in a terminal concentrator can produce a lot of short I/O operations as well as interrupting for each one could create a heavy load on the system. An opportune polling loop could alleviate that load without wasting many resources through looping with no I/O needed.

Posted Date: 7/29/2013 2:15:54 AM | Location : United States







Related Discussions:- Interrupt-driven i/o to manage a single serial port, Assignment Help, Ask Question on Interrupt-driven i/o to manage a single serial port, Get Answer, Expert's Help, Interrupt-driven i/o to manage a single serial port Discussions

Write discussion on Interrupt-driven i/o to manage a single serial port
Your posts are moderated
Related Questions
how to find ncr value in shell script

Note that the parameter for scanf doesn't need the address operators & because name is an address. However the variable name has no defined space. This can cause problems within C

What are batch systems? Batch systems are quite appropriate for implementing large jobs that need little interaction. The user can submit jobs and return later for the results.

MEMORY MANAGEMENT USING LINK LISTS The first one is for showing it is process or hole, second is for starting address and third is for length of the process and last is a point

I am not getting what you have tried to describe here. Can you elaborate more about this, i will be thankful to you. Vinay

Write a note on multithreading. Multithreading is the capability of an operating system to execute different parts of a program called as threads, at the same time. The program

Thermostats are subjected to rigorous testing before they are shipped to air conditioning technicians around the world. Results from the last five samples are shown in the table. D


Define busy waiting and spinlock. When a process is in its significant section, any other process that tries to enter its critical section must loop continuously in the entry c

Now, let us discuss two related algorithms for deciding which pages to evict. The clock algorithm is one of the most popular choices. It works by keeping frames in a circular struc