Compute the effective instruction time on the system, Operating System

Assignment Help:

Q. An operating system sustains a paged virtual memory using a central processor with a cycle time of 1 microsecond. It costs an additional one microsecond to access a page other than the current one. Pages have 1000 words as well as the paging device is a drum that rotates at 3000 revolutions per minute and transfers one million words per second. The subsequent statistical measurements were obtained from the system:

  • One percent of all instructions implemented accessed a page other than the current page.
  • An instructions that accessed another page 80 percent accessed a page already in memory.
  • When a fresh page was required the replaced page was modified 50 percent of the time.

Compute the effective instruction time on this system assuming that the system is running one process only in addition to that the processor is idle during drum transfers.

Answer:

Effective access time                                                  = 0.99 × (1 μ sec + 0.008 × (2 μ sec)

+ 0.002 × (10,000 μ sec + 1,000 μ sec)

+ 0.001 × (10,000 μ sec + 1,000 μ sec)

= (0.99 + 0.016 + 22.0 + 11.0) μ sec

= 34.0 μ sec


Related Discussions:- Compute the effective instruction time on the system

How can deadlocks be represented?, How can deadlocks be represented? D...

How can deadlocks be represented? Deadlocks are able to be described in terms of a directed graph called as a system resource-allocation graph. This graph contains of the foll

What are the various available scheme in ipc, Several schemes available are...

Several schemes available are as follows: Pipes : One-way communication process through which different process can interact. The problem is that the two processes could have

Fcfs scheduling algorithm, Q. Presume that the following processes arrive f...

Q. Presume that the following processes arrive for execution at the times indicated. Every process will run the listed amount of time. In responding the questions use non pre-empti

What is a two state process model?, What is a two state process model? ...

What is a two state process model?   At any time a process is being implementing by a processor or not. Therefore a process may be in Running or not running state. When an Ope

Why interrupt can be used, Why interrupt can be used? The majority of t...

Why interrupt can be used? The majority of the different parts of the PC need to send information to and from the processor and they expect to be able to get the processor's at

How does windows xp execute transport protocols, Q. What kinds of networkin...

Q. What kinds of networking does Windows XP support? How does Windows XP execute transport protocols? Describe two networking protocols. Answer: Support is offer for bo

Define how to manage the interaction of client and server, Managing the int...

Managing the interaction of client and server  Among the differences between traditional application programs and client server ones is that developers must create a mechanism

Define a policy for data storage, Produce a referenced four page report whi...

Produce a referenced four page report which describes the possible functionality of the system; similar systems that are out there and different possible approaches to delivering t

Write an equation for this seek time, Q. The accelerating search for descr...

Q. The accelerating search for described in subsequent exercise is typical of hard-disk drives. By contrast floppy disks and several hard disks manufactured before the mid-1980s t

What is busy waiting, What is busy waiting? The repeated implementation...

What is busy waiting? The repeated implementation of a loop of code while waiting for an event to happen is known as busy-waiting. The CPU is not engaged in any actual producti

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