Assume a system of 4 processes P = {P1, P2, P3, P4} and 5 memory cells M All memory cells are initialed to 0 before any processes are started. The processes implement the following instructions: Process Instructions |M₁ + 1 — M5 ⇒ M3 = {M1, M2, M3, M4, M5}. P1 P2 |2M3 ⇒ M2 P3 M4 +7 ⇒ M3; M3 - 1⇒ M2 (Sequentially) P4 |2M2 ⇒ M4 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 M₁+ 2M3 My+7 ама 0-0-0 Range M3 M3+ M5 Ma/2 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 All memory cells are initialed to 0 before any processes are started. The processes implement the following instructions: Process Instructions |M₁ + 1 — M5 ⇒ M3 = {M1, M2, M3, M4, M5}. P1 P2 |2M3 ⇒ M2 P3 M4 +7 ⇒ M3; M3 - 1⇒ M2 (Sequentially) P4 |2M2 ⇒ M4 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 M₁+ 2M3 My+7 ама 0-0-0 Range M3 M3+ M5 Ma/2 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?
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
Question
Please explain how to solve this question step by step and answer all parts!!
![Assume a system of 4 processes P = {P1, P2, P3, P4} and 5 memory cells M
All memory cells are initialed to 0 before any processes are started.
The processes implement the following instructions:
Process
Instructions
|M₁ + 1 — M5 ⇒ M3
=
{M1, M2, M3, M4, M5}.
P1
P2
|2M3 ⇒ M2
P3
M4 +7 ⇒ M3; M3
-
1⇒ M2 (Sequentially)
P4
|2M2 ⇒ M4
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
M₁+
2M3
My+7
ама
0-0-0
Range
M3 M3+ M5
Ma/2
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?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4217e83c-b4b2-47da-9d7a-2d6031448fca%2F4a645bf8-2b02-4843-88ca-af1923a3b955%2Fyn4lmyb_processed.png&w=3840&q=75)
Transcribed Image Text:Assume a system of 4 processes P = {P1, P2, P3, P4} and 5 memory cells M
All memory cells are initialed to 0 before any processes are started.
The processes implement the following instructions:
Process
Instructions
|M₁ + 1 — M5 ⇒ M3
=
{M1, M2, M3, M4, M5}.
P1
P2
|2M3 ⇒ M2
P3
M4 +7 ⇒ M3; M3
-
1⇒ M2 (Sequentially)
P4
|2M2 ⇒ M4
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
M₁+
2M3
My+7
ама
0-0-0
Range
M3 M3+ M5
Ma/2
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?
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