What is the problem in Dining Philosophers?
The dining philosopher’s problem is the classical problem of synchronization which says that Five philosophers are sitting around a circular table and their job is to think and eat alternatively. A bowl of noodles is placed at the center of the table along with five chopsticks for each of the philosophers.
What is the dining philosophers problem How is it solved?
Solution of Dining Philosophers Problem A solution of the Dining Philosophers Problem is to use a semaphore to represent a chopstick. A chopstick can be picked up by executing a wait operation on the semaphore and released by executing a signal semaphore.
How can we prevent deadlock in dining philosopher?
The waiter solution to Dining Philosophers Strategy: Every philosopher must request each of their (shared) chopsticks from a waiter, who may refuse the request at first in order to avoid a deadlock. For convenience, we assume that all philosophers request their left chopstick first, then their right chopstick.
How is dining philosophers problem related to OS?
The dining philosophers problem is a classic example in computer science often used to illustrate synchronization issues and solutions in concurrent algorithm design. It illustrates the challenges of avoiding a system state where progress is not possible, a deadlock. The problem was created in 1965 by E. W. Dijkstra.
Why the philosophers are eating spaghetti in dining philosophers problem?
Each philosopher must alternately think and eat. However, a philosopher can only eat spaghetti when they have both left and right forks. Each fork can be held by only one philosopher and so a philosopher can use the fork only if it is not being used by another philosopher.
How many philosophers at most may eat simultaneously in the dining philosophers problem with 5 philosophers?
12 that has no deadlock and no starvation is to protect the five statements following the call to think by a binary semaphore. It has a performance bug: only one philosopher can be eating at any instant. With five forks available, we should be able to allow two philosophers to eat at the same time.
What is dining philosopher problem and how can it be solved using mutex locks?
To address this problem, we may consider each chopstick as a shared item protected by a mutex lock. Each philosopher, before he can eat, locks his left chopstick and locks his right chopstick. If the acquisitions of both locks are successful, this philosopher now owns two locks (hence two chopsticks), and can eat.
What is dining philosophers problem discuss the solution to dining philosopher’s problem using monitors?
Monitor-based Solution to Dining Philosophers Monitor is used to control access to state variables and condition variables. It only tells when to enter and exit the segment. This solution imposes the restriction that a philosopher may pick up her chopsticks only if both of them are available.
What happens if all the philosophers pick left chopstick first then right chopstick in DP problem?
If philosopher P cannot eat for this moment, either he has no chopsticks or only has his right chopstick. If philosopher P has his right chopstick, he can eat once his left chopstick is available.
What is the problem if all Dining Philosophers simultaneously pick up their left fork explain?
Resource hierarchy solution The order in which each philosopher puts down the forks does not matter. In this case, if four of the five philosophers simultaneously pick up their lower-numbered fork, only the highest-numbered fork will remain on the table, so the fifth philosopher will not be able to pick up any fork.
What is the dining philosophers problem in Computer Science?
Computer Science MCA Operating System. The dining philosophers problem states that there are 5 philosophers sharing a circular table and they eat and think alternatively. There is a bowl of rice for each of the philosophers and 5 chopsticks. A philosopher needs both their right and left chopstick to eat.
What is the dining philosophers problem MCA?
Dining Philosophers Problem (DPP) Computer Science MCA Operating System The dining philosophers problem states that there are 5 philosophers sharing a circular table and they eat and think alternatively. There is a bowl of rice for each of the philosophers and 5 chopsticks.
How to solve the dining philosophers problem in ABA?
A solution of the Dining Philosophers Problem is to use a semaphore to represent a chopstick. A chopstick can be picked up by executing a wait operation on the semaphore and released by executing a signal semaphore. The structure of the chopstick is shown below −
How does a hungry philosopher eat from the bowl?
In order for a hungry philosopher to eat from the bowl he needs to have both the left and right chopstick available for his use, otherwise, he must sit down his chopstick and go back to thinking. The whole idea of the problem is to design a concurrent algorithm that prevents a deadlock situation.