Assume a system of 4 processes P = {P1, P2, P3, P4} and 5 memory cells M = {M₁, M2, M3, M4, M5}. All memory cells are initialed to 0 before any processes are started. The processes implement the following instructions: Process Instructions M₁ +1 M5 M3 2M3 ⇒ M2 P₁ P2 P3 P4 2M2 ⇒ M4 |M4 +7 ⇒ M3; M3 - 1 ⇒ M2 (Sequentially) You are also given the following precedence relation: ⇒: {(P2, P4), (P2, P3), (P1, P2), (P1, P4)} What is the domain and range of each process? P₁ P2 • P3 P4 Process •-•-● Domain Range M3\; M3+ Ms MaXa M₁+-5/ 2M3 My+7 ама M3-1; M2+1 M412 Is the system of processes determinate? Why or why Not? Are all pairs of processes mutually non-interfering? Why or Why Not? What modifications are needed to guarantee that the system will be determinate for all interpretations?

Assume a system of 4 processes P = {P1, P2, P3, P4} and 5 memory cells M = {M₁, M2, M3, M4, M5}. All memory cells are initialed to 0 before any processes are started. The processes implement the following instructions: Process Instructions M₁ +1 M5 M3 2M3 ⇒ M2 P₁ P2 P3 P4 2M2 ⇒ M4 |M4 +7 ⇒ M3; M3 - 1 ⇒ M2 (Sequentially) You are also given the following precedence relation: ⇒: {(P2, P4), (P2, P3), (P1, P2), (P1, P4)} What is the domain and range of each process? P₁ P2 • P3 P4 Process •-•-● Domain Range M3\; M3+ Ms MaXa M₁+-5/ 2M3 My+7 ама M3-1; M2+1 M412 Is the system of processes determinate? Why or why Not? Are all pairs of processes mutually non-interfering? Why or Why Not? What modifications are needed to guarantee that the system will be determinate for all interpretations?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter11: Operating Systems

Section: Chapter Questions

Problem 3VE

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