Does Peterson algorithm work on more than two process?

Does Peterson algorithm work on more than two process?

Peterson in 1981. While Peterson’s original formulation worked with only two processes, the algorithm can be generalized for more than two.

What are the drawbacks of Peterson’s algorithm?

(i) This algorithm satisfies the “mutual exclusion”, “progress” and “bounded waiting” condition. ii) This algorithm has a flaw as the variable “turn” can be modified by both processes at the same time. iii) This algorithm may cause “deadlock” if both processes set their flags to True at the same time.

How many processes can be synchronized with Peterson’s solution?

two processes
Explanation of Peterson’s algorithm – Peterson’s Algorithm is used to synchronize two processes. It uses two variables, a bool array flag of size 2 and an int variable turn to accomplish it.

How many processes that alternate execution between their critical section and remainder section in Peterson’s solution?

Peterson’s solution is restricted to two processes that alternate execution between their critical sections and remainder sections. The processes are numbered Po and Pi.

Does Peterson’s solution work properly when two processes try to enter critical region at the same time?

Disadvantage. Peterson’s solution works for two processes, but this solution is best scheme in user mode for critical section. This solution is also a busy waiting solution so CPU time is wasted.

How many philosophers may eat simultaneously in the Dining Philosophers problem with 5 philosophers?

With five forks available, we should be able to allow two philosophers to eat at the same time.

Does Peterson solution satisfy bounded wait?

Here, the Peterson’s solution is considers strict alternation so, alternatively process[0] and process[1] will get access to critical section. Here bounded waiting won’t be satisfied in case e.g. some process gets C.S. repeatedly starving other processes but this situation is not possible because of strict alternation.

How does Peterson’s algorithm guarantee mutual exclusion?

Basically, Peterson’s algorithm provides guaranteed mutual exclusion by using only the shared memory. It uses two ideas in the algorithm: Willingness to acquire lock. Turn to acquire lock.

What is critical section problem and explain two process solutions and multiple process solutions?

A critical section is a segment of code which can be accessed by a signal process at a specific point of time. Three must rules which must enforce by critical section are : 1) Mutual Exclusion 2) Process solution 3)Bound waiting.

What are the advantages and disadvantages of Peterson solution to the critical section problem?

Disadvantage. Peterson’s solution works for two processes, but this solution is best scheme in user mode for critical section. This solution is also a busy waiting solution so CPU time is wasted. So that “SPIN LOCK” problem can come.

How does Peterson’s algorithm work with multiple processes?

In Peterson’s algorithm, a process will never wait longer than one turn for entrance to the critical section: After giving priority to the other process, this process will run to completion and set its flag to 1, thereby never allowing the other process to enter the critical section…

What is the meaning of bound by bounded waiting in Peterson’s algorithm?

Bounded waiting. In Peterson’s algorithm, a process will never wait longer than one turn for entrance to the critical section: After giving priority to the other process, this process will run to completion and set its flag to 1, thereby never allowing the other process to enter the critical section…

How many processes can be added to a critical section?

While Peterson’s original formulation worked with only two processes, the algorithm can be generalized for more than two. The algorithm uses two variables, flag and turn. A flag [n] value of true indicates that the process n wants to enter the critical section.

What are the variables used in the process Pi algorithm?

 The algorithm uses two variables, flag and turn.  The variable turn indicates whose turn it is to enter the critical section.  If turn == i, then process Pi is allowed.  The flag array is used to indicate if a process is ready to enter the critical section.  Flag [i] = true implies that process Pi is ready.