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

Assignment Help:

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.


Related Discussions:- Interrupt-driven i/o to manage a single serial port

What is the design issues involved in segmentation?, SEGMENTATION HARDWARE ...

SEGMENTATION HARDWARE An execution to map two-dimensional user-defined addresses into one-dimensional physical addresses. This mapping is affected by means of segment table. Ev

Explain about functions of operating system, Q. Explain about Functions of ...

Q. Explain about Functions of Operating System? Functions of Operating System Operating system performs 3 functions as follows: 1.  Convenience:   Operating System mak

Caching name translations for computers, Q. Discuss the advantages as well ...

Q. Discuss the advantages as well as disadvantages of caching name translations for computers located in remote domains. Answer: There is a performance benefit to caching nam

What is an operating system, What is an operating system? An operating ...

What is an operating system? An operating system is a program that manages the computer hardware. It acts as an intermediate among users of a computer and the computer hardware

Split the hexadecimal format, The following is a dump of a TCP header in h...

The following is a dump of a TCP header in hexadecimal format: 00CD0018 00000EF1 00000D5D 502200D1 01BF0010 We need to first split the above hex as such 00 CD 00 18 00 00

Define where a program generation activity aims, Define where a Program gen...

Define where a Program generation activity aims  Program generation activity aims at Automatic generation of program

Explain and differentiate programmed and interrupt i/o, Question 1 Explain...

Question 1 Explain the structure of operating system in detail Question 2 Explain the following scheduling algorithm                                     1) First come Firs

Define caching, Define caching. A cache is a region of fast memory that...

Define caching. A cache is a region of fast memory that holds copies of data. Access to the cached copy is well-organized than access to the original. Caching and buffering are

Explain system-wide open-file and per-process open-file, Explain system-wid...

Explain system-wide open-file and per-process open-file The system-wide open-file table have a copy of the FCB of each open file, as well as other information. The per-pr

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd