Explain busy waiting semaphores, Operating System

Assignment Help:

Explain Busy Waiting Semaphores

Weak, Busy-wait Semaphores

a) The simplest way to implement semaphores.

b) Useful while critical sections last for a short time, or we comprise lots of CPUs.

c) S initialized to positive value (to permit someone in at the beginning).

d) S is an integer variable that, aside from initialization, can only be accessed by 2 atomic and mutually exclusive operations: 

wait(s):

while (s.value != 0);

s.value--;

signal(s):

s.value++;

 All happens atomically that is wrap pre and post protocols.


Related Discussions:- Explain busy waiting semaphores

Custom memory allocation, Some people write custom memory allocators to mee...

Some people write custom memory allocators to meet their speci?c needs. Although this is not needed for most of the applications, it is also not uncommon. The goal, of course, is t

What is the use of FIFOs in client-server applications, What is the use of ...

What is the use of FIFOs in client-server applications

Define server processing with queues, Define Server Processing with Queues ...

Define Server Processing with Queues The efficient server processing of client request is essential for optimized client- server applications. This process is greatly enhanced

GIS, 1. The City of Boston needs to be about 2 acres of green space per 1,0...

1. The City of Boston needs to be about 2 acres of green space per 1,000 persons. You have been hired as the GIS expert by an independent consulting company to determine where the

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

What do you understand by active directory domain, Question: a) What ...

Question: a) What do you understand by Active directory domain in Windows Server 2008? Support your answer with a diagram. b) Distinguish between active directory trees

Paging, what is the use of valid invalid bits in paging

what is the use of valid invalid bits in paging

Drawbacks of least-recently used algorithm, The question of fairness, regar...

The question of fairness, regarding page eviction, is a hard one. How do we decide what is fair? Many operating systems use global LRU, where pages from all processes are managed t

Advanced synchronization in operating system, Recall that condition variabl...

Recall that condition variables are synchronization primitives that enable threads to wait until a particular condition occurs. Generalizing, the combination of locks and condit

Explain how indefinite blocking or starvation occur, explain how indefinit...

explain how indefinite blocking or starvation occurs..

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