2. Consider the following snapshot of a system with four resource types R1, R2, R3and R4, and four processes A, B, C and D:AllocationR₁R₂RsRRiRaRequestRaAvailableRAR₁R₁₂Ra R₁A101101000000B11000110C10110000D00001Steasejak00Is the system in a deadlock state? If the system is in a deadlock state, list allprocesses that are involve in a deadlock. Show your computation step-by-step;

When two or more processes or threads are stuck in a position where they are waiting for each other…

2. Consider the following snapshot of a system with four resource types R1, R2, R3 and R4, and four processes A, B, C and D: Allocation Request R₁ R2 Rs RA R1 R₂ Rs B RA R1 Available R₂ R3 Ra A 1 0 1 1 0 1 0 0 0 0 0 0 B 1 1 0 0 0 1 1 0 C 1 0 1 1 0 0 0 0 D 0 0 0 0 1 0 1 0 Is the system in a deadlock state? If the system is in a deadlock state, list all processes that are involve in a deadlock. Show your computation step-by-step;

2. Consider the following snapshot of a system with four resource types R1, R2, R3 and R4, and four processes A, B, C and D: Allocation Request R₁ R2 Rs RA R1 R₂ Rs B RA R1 Available R₂ R3 Ra A 1 0 1 1 0 1 0 0 0 0 0 0 B 1 1 0 0 0 1 1 0 C 1 0 1 1 0 0 0 0 D 0 0 0 0 1 0 1 0 Is the system in a deadlock state? If the system is in a deadlock state, list all processes that are involve in a deadlock. Show your computation step-by-step;

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Consider the schedules S, and S, given below. Draw the precedence graphs for S, and S, and state whether each schedule is serializable or not ? S, :r,(X); r(Z); r,(Z); r3(X); r3(Y); w,(X ); w,(Y ); r,(Y); w,(Z ); w,(Y) S2 : r,(X ); r2(X); r,(Z); r,(Z); r,(X); r,(Y); w,(X); w,(Y); r2(Y); w,(Z ); w,(Y)
Operating system.
Consider the Follow Resource allocation Graph: T₂ T₁ R₁ R₂ Deadlock Present. O No Deadlock Present: T4, T1, T3, T2 Does this set of tasks contain a deadlock? If not what is a valid order of executions of tasks? T3 O No Deadlock Present: T1, T2, T3, T4 No Deadlock Present: T3, T1, T4, T2 TA
Computer science
Consider a system containing three periodic tasks: T1 = (10,3), T2 = (30,5), and T3 = (60,6), handled by Rate Monotonic. Solve the scheduling produced by a sporadic server with Ts = 20, Cs = 5, which is scheduled with the other tasks according to the RMA principle. Suppose there are three sporadic jobs S1 = (10,7,30) and S2 = (15,3,60), and S3 = (20,8,70). Work out a timing diagram showing the schedule of the system. Would any deadline be broken?
In a computer system five processes are attempting to proceed with three resource types. The total units of system resources are: (8,9,7). The maximum demands for every process are: P1(3,1,1), P2(3,3,2), P3(5,3,2), P4(5,1,2), P5(8,4,3). The current allocation is: P1 (0,1,1), P2 (2,1,1), P3 (3,1,2), P4 (1,1,1), and P5 (2,3,2). Is this state a safe state? Explain your answer. Please explain in great detail so i can understand .
Modern Operating Systems must tackle the challenges of Synchronization and Deadlock. 'Pro- vess Synchronization' is the task of coordinating the execution of processes in a way that no two processes can have access to the same shared data or resource. A process requesting a resource may have to wait, if the resource is not available at that time. Sometimes, a waiting process is never able to change state, because the resources it has requested are held by other waiting processes; this situation is called 'Deadlock'. ,In concurrent programming, a "critical section" is a part of a multi-process program that (a) may not be concurrently executed by more than one of the program's thread. Let us consider a 2 processes solution: do { flag(i] - TRUE; while (flag[j]); %wait CRITICAL SECTION flag[i] - FALSE; REMAINDER SECTION } while (TRUE); Pseudo-code of $P_i$ (the one of $P_j$ is symmetric) (i) { simple 'yes-no' answer is NOT enough. What is the mutual exclusion requirement? Why is (not?)…
5. Consider the following set of tasks in a real-time system: Tasks Release time Execution time Absolute deadline T 1 40 T2 10 30 T 3 7 60 T 4 10 10 20 T 5 12 6 70 Perform EDF (Earliest Deadline first) scheduling on this task set.
To not let any process wait longer than 500 ms, a system developer programs the Round Robin procedure with a dynamic time quantum size. With ‘n’ processes ready, the time quantum Q is set to 500 ms/n. What do you think of this scheduling strategy? (In which situations is this strategy feasible, and when is it not? Are there edge cases?) Explain your reasoning.
Consider the following snapshot of a system: Allocation Max Available A B C D A B C D A B C D T0 2 1 0 6 6 3 2 7 2 1 3 1 T1 3 3 1 3 5 4 1 5 T2 2 3 1 2 6 6 1 4 T3 1 2 3 4 4 3 4 5 T4 3 0 3 0 7 2 6 1 What are the total resources for A, B, C and D respectively? Select one: a.11, 10, 8, 16 b. 13, 10, 11, 16 c.11, 9, 8, 15 d.28, 18, 14, 22
Consider a system consisting of four processes and a single resource. The current state of the claim and allocation matrices are 44 A = What is the minimum number of units of the resource needed to be available for this state to be safe?
Based on the below system state, how many number of resource instances of type A, B, C, and D are there? (suppose there is no errors in table) Process Max Allocation Available ... A, B, C, D A, B, C, D A, B, C, D PO 6 0 1 2 40 0 1 3 2 1 1 P1 2750 1 10 0 P2 2356 1 2 5 4 P3 16 5 3 0633 P4 16 5 6 0 2 1 2