What is the cache coherency problem, Operating System

Assignment Help:

Question:

(a) Modern processors operate in one of two modes: one for the operating system and one for applications. What is the purpose of having these two modes?

What are the usual mechanisms for switching from system mode to application mode, and vice versa?

(b) (i) Compare UMA (Uniform Memory Access) and NUMA (Non Uniform Memory Access) Microprocessor System.

(ii) What is the cache coherency problem in a multiprocessor environment?

(c) Discuss the following multiprocessor scheduling strategies Space Sharing Gang Scheduling.

(d) Three source files normally take 10 seconds, 18 seconds and 30 seconds respectively to compile by themselves on one processor in a processor pool. How long should it take to compile all the files using two processors? Explain what is liable to limit the time attainable for a parallel compilation, especially as the number of compilations increases.

(e) Steaming audio or video services are usually implemented over UDP instead of TCP. Assuming that both impose roughly the same computational burden on the processor, explain why this is the case?


Related Discussions:- What is the cache coherency problem

Modern os, importance of Operating system in modern computers. Also explain...

importance of Operating system in modern computers. Also explain various functions & types of operating systems

What is direct access, Normal 0 false false false EN-IN...

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

What are the three main activities of an operating system, What are the thr...

What are the three main activities of an operating system in regard to memory management? Keep track of which parts of memory are now being used and by whom. Decide which pr

What are the functions of virtual file system (vfs), What are the functions...

What are the functions of virtual file system (VFS)? a. It separates file-system-generic operations from their execution defining a clean VFS interface. It permits transparent

Explain drawbacks of fixed partitioning, The drawbacks of fixed partitionin...

The drawbacks of fixed partitioning are: The number of partitions are précised at system generation time limits the number of active processes in the system. For the re

Explain page traffic, The term ‘page traffic’ explains   Page traffic’...

The term ‘page traffic’ explains   Page traffic’ explains the movement of pages in and out of memory.

Explain the concept of process, Q. Explain the Concept of Process? A pr...

Q. Explain the Concept of Process? A process is sequential program in execution. A process states the basic unit of computation for the computer. Components of process are:

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