P3 sets M3 before it reads it, so M3 is not in the domain. 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 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? D R PI Mi, Ms Ms Pz M3 M2 M3, M2, M3 M4 P3 M² PyMz Ри My = {M1, M2, M3, M4, M5}.|

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
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P3 sets M3 before it reads it, so M3 is not in the domain.
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
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?
D
R
PI Mi, Ms Ms
Pz M3
M2
M3, M2, M3
M4
P3 M²
PyMz
Ри
My
=
{M1, M2, M3, M4, M5}.|
Transcribed Image Text:P3 sets M3 before it reads it, so M3 is not in the domain. 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 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? D R PI Mi, Ms Ms Pz M3 M2 M3, M2, M3 M4 P3 M² PyMz Ри My = {M1, M2, M3, M4, M5}.|
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