We are here with you hands in hands to facilitate your learning & don't appreciate the idea of copying or replicating solutions. Read More>>

Looking For Something at vustudents.ning.com? Click Here to Search

Q 1. Suppose we have a 1.5-GHz CPU to which the following three I/O devices are connected:


  1. Flash drive that can transfer data in 32-byte chunks with a maximum transfer rate of 16 MB/sec
  2. DVD drive which can transfer data in 16-byte chunks with a maximum transfer rate of 16 MB/sec
  3. Joystick that needs to be polled 50 times per second


Polling requires 300 instructions for each I/O device. Students are required to compute the percentage of CPU time required to poll each device.



Q 2. Instead of polling, we want to use interrupts for handling the DVD drive. Keeping in view the DVD drive to be active only 12% of the time, you are required to compute the percentage of CPU time for handling it.


Note: Interrupt and polling requires the same amount of instructions.

Share This With Friends......

+ Click Here To Join also Our facebook study Group.

This Content Originally Published by a member of VU Students.

+ Prohibited Content On Site + Report a violation + Report an Issue

..How to Join Subject Study Groups & Get Helping Material?..

Views: 8922

See Your Saved Posts Timeline

Replies to This Discussion

plz complete solution send kr dein

fil m

mujhy aik bat ki smjh ni a ri wo y k...bytes of  chunks ki bat ki assignment m or handouts m buses ki bat h. or CPU ka bi ni mention assignment m k kitni buses hen, bcz 32 bit CPU p to agr 16 bits buses drive ki hon to half ..krte

please help




a = 10 %

b = 20 %

c = 0.001 %



please share solution


koi solution mila? kisi ko...

plz cs501 solution plz

plz share your solution.

plz solution share kar dy cs501 ka


© 2019   Created by + M.Tariq Malik.   Powered by

Promote Us  |  Report an Issue  |  Privacy Policy  |  Terms of Service