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

What are the issues in designing a network, Normal 0 false fa...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Calculate the maximum file size , A UNIX file system has 1-KB blocks and 4-...

A UNIX file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contains 10 direct entries, and one single, double, and triple indirect entry

Explain gui based operating system, GUI - Short for Graphical User Interfa...

GUI - Short for Graphical User Interface a GUI Operating System contains icons and graphics and is commonly navigated by using a computer mouse. Below are some instances of GUI Op

Define a state which is not a fundamental process state, Define a state whi...

Define a state which is not a fundamental process state Answer: Blocked state is not a fundamental process state

Virtual memory, In modern operating systems, applications do not directly a...

In modern operating systems, applications do not directly access the physical memory. Instead, they use so-called virtual memory, where each virtual address is translated to a phys

Define a set of methods that allow executing a program, A set of methods th...

A set of methods that allow executing a program which is not completely in memory   is called A set of methods that allow executing a program which is not completely in memory

Single-level page tables, As mentioned above, page tables, are lookup table...

As mentioned above, page tables, are lookup tables mapping a process' virtual pages to physical pages in RAM. How would one implement these page tables? The most straightforward

What are the benefits of multithreaded programming, What are the benefits o...

What are the benefits of multithreaded programming? The advantages of multithreaded programming can be broken down into four main categories: Responsiveness Resourc

Briefly describe the producer-consumer problem, Question: a) Each proc...

Question: a) Each process is represented in the operating system by a process control block (PCB). The PCB contains many pieces of information associated with a specific proce

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