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

Processes, draw a state diagram showing the transissions of a process from ...

draw a state diagram showing the transissions of a process from creation to termination

What problems arise if the directory is a general graph, What problems aris...

What problems arise if the directory structure is a general graph? Searching for a particular file may result in searching the similar directory many times. Deletion of the fil

Define loader that executed when system is first turned on, Define a loader...

Define a loader that is executed when a system is first turned on or restarted? Bootstrap loader is executed when a system is first turned on or restarted

Briefly explain about file system implementation, Briefly explain about fil...

Briefly explain about file system implementation? Several on-disk and in-memory structures are used to execute a file system. On disk, the file system may have information abou

Peer to peer network and a client server network, Question : a) Describ...

Question : a) Describe the difference between the authentication of a user account on a peer to peer network and a client server network. b) Compare an end user account with

Aggregate planning, Prepare a report that motivates alternatives reactive s...

Prepare a report that motivates alternatives reactive strategies that can be used by wind Mud clothing factory

Enforce memory protection at compile time?, Why is it not possible to enfor...

Why is it not possible to enforce memory protection at compile time?   Every process should be protected against unwanted interference by other process, whether intentional or

Write in brief on unix file structure, Write in brief on UNIX file structur...

Write in brief on UNIX file structure. UNIX considers every file to be a sequence of 8-bit bytes no interpretation of these bits is made by the operating system. This system pr

Define thread cancellation and target thread, Define thread cancellation & ...

Define thread cancellation & target thread. The thread cancellation is the task of terminating a thread before it has completed. A thread that is to be cancelled is often refer

Protection scheme in unix, Q. Consider a system that holds 5000 users. Pre...

Q. Consider a system that holds 5000 users. Presume that you want to allow 4990 of these users to be able to access one file. a. How would you denote this protection scheme in

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