(i) Describe Banker’s algorithm for deadlock avoidance with supporting example Consider a computer system with has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock

(i) Describe Banker’s algorithm for deadlock avoidance with supporting example Consider a computer system with has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section: Chapter Questions

Problem 17RP

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QUESTION TWO A. (i) Describe Banker’s algorithm for deadlock avoidance with supporting example (ii)Consider a computer system with has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock B. Give a solution for the following synchronization problem using semaphores (i)Producer- Consumer Problem (ii)Readers- Writers Problem C. List out the issues in preprocessor scheduling that causes performance degradation in multiprocessor systems
Consider a computer system which has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in any way that is, two in one shot or one by one. The system always satisfies a request for a resource if enough resources are available. If the processes don't request any other kind of resource, show that the system never deadlocks?
Ch-6 1. The first known correct software solution to the critical-section problem for n processes with a lower bound on waiting of n − 1 turns was presented by Eisenberg and McGuire. The processes share the following variables: enum pstate { idle, want_in, in_cs}; pstate flag[n]; int turn; All the elements of flag are initially idle. The initial value of turn is immaterial (between 0 andn-1).ThestructureofprocessPi isshowninthefollowingFigure.Provethatthe algorithm satisfies all three requirements for the critical-section problem.
7. (a) Answer the following by giving proper justification and examples:(i) Are all serializable schedules conflict-serializable?(ii) Are all conflict-serializable schedules view-serializable. (b) Consider the following schedules:(i) S1: r1 (X), r2 (Z), r2 (Z), r3 (X), r3 (Y), w1 (X), w2 (Y), r2 (Y), w2 (Z), w2 (Y)(ii) S2: r1 (X), r2 (Z), r2 (X), r1 (Z), r2 (Y), r3 (Y), w1 (X), w2 (Z), w3 (Y), w2 (Y)Draw precedence graph for the above schedules and check whether each schedule is serializable or not. If a schedule is serializable, write down the equivalent serial schedule(s)?
Various synchronization problems such as the bounded-buffer problem and the dining-philosophers problems are important mainly because they are examples of a large class of concurrency control problem. a) Present the problem: write pseudo-code of the producer (P) process and the pseudo-code of the consumer (C) process. b) Make a possible simulation of the entire system considering a NON preemptive execution of the P and C processes. c) Make a possible simulation of the entire system considering the preemptive execution of the P and C processes. d) Where is the problem? Explain. e) Modify the previous pseudo-code to solve the bounded-buffer problem using semaphores. f) Make a possible simulation of the entire system when using semaphores.
Hey, I have already received a good answer to this question but I am looking for greater detail to be provided. There are three processes P1, P2 and P3 are running in a system with 3 instances of a resource R1, 2 instances of a resource R2, and 2 instances of a resource R3. At a given time the allocation matrix is: A = [{1, 1, 1} { 0, 1, 0} { 1, 0, 0 }] Assume that the maximum matrix is M = [ {2,2,1} {1,1,1} {3,1,0}] While in this state, a new process P4 is created which requires at most 2 instances of R1 and one instance of R2. This process initially requests one instance of R1 to be allocated to it. Using the Banker’s algorithm, determine whether this request can be granted or must be refused.
79. One way to ensure that the circular wait condition never holds is to : a. impose a total ordering of all resource types and to determine whether one precedes another in the ordering b. to never let a process acquire resources that are held by other processes c. to let a process wait for only one resource at a time d. all of the mentioned
Explain the procedure that allows all the processes to get their resource allocation for the following graph
List/explain 3 different ways that a system can recover from deadlock. Know the necessary conditions for deadlock and explanations of each. Why is it necessary to have an atomic instructions for providing access to a critical section? Consider a system with 5 processes (A, B, C, D and E) and 5 single instances of resources (Q, R, S, T, U) with given assignments (A holds R and wants T, C holds T and wants Q, etc). Construct a resource allocation graph. Determine if deadlock occurred. Draw a wait-for graph of the system. It's a C Programming
Banker’s Algorithm question Consider the following snapshot of a system: Using the banker’s algorithm, determine whether or not each of the following states is unsafe. If the state is safe, illustrate the order in which the processes may complete. Otherwise, illustrate why the state is unsafe. For each sub question, state whether it is safe or not and supply a safe order if safe. Illustrate why they are safe or not safe Available = (1, 0,0,1) Available = (1, 1, 0, 0)
6. A system is in a ______ state if there exists a set of transactions such that every transaction in the set is waiting for another transaction in the set. a. Idle b. Waiting c. Deadlock d. Ready
11 Consider a situation where 5 instances of a resource are available. That means maximum 5 processes are allowed to enter the critical section at any point in time. Please provide a solution using a counting semaphore. Write the pseudocode for each process.