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

Introduction to microprocessors, Let us consider the pining details of the ...

Let us consider the pining details of the 68HC11 as shown below.     Each pin has a defined function, some easy, some complex. A microprocessor designer should understan

What is banker''s algorithm, What is banker's algorithm? Banker's algor...

What is banker's algorithm? Banker's algorithm is a deadlock avoidance algorithm that is applicable to a resource-allocation system with multiple examples of each resource type

Server thread, Extend task 1 so that the requests are issued by the clients...

Extend task 1 so that the requests are issued by the clients instead of the server. The server now do not use the "all_requests.dat" file. Instead every client thread reads from

Linux OS, Ask questioDevelop a utility in C language which will run in Linu...

Ask questioDevelop a utility in C language which will run in Linux operating systems to display following properties of the system: ? Processor speed ? Ram size ? Computer name ? S

What are the different accessing methods of a file, What are the different ...

What are the different accessing methods of a file? The different types of accessing a file are: Sequential access: Information in the file is accessed sequentially

Explain about demand paging, Explain about demand paging? A demand pagi...

Explain about demand paging? A demand paging system is same to a paging system with swapping. Processes reside on secondary memory. When we require executing a process, we chan

What is the purpose of system calls, Q. What is the purpose of system calls...

Q. What is the purpose of system calls? Answer: System calls permit user-level processes to request services of the operating system.

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

Write on short note dma., Write on short note DMA. Direct M emory...

Write on short note DMA. Direct M emory Access (DMA) is a technique for transferring data from  main to a device without passing it through the CPU. Computers that have

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