6) The following program is executed by 2 processes p and q concurrently for i = 1; i <= 3; i++ x = x + 1 The variable x is shared by the two processes. • The instruction x = x + 1 is compiled into 3 machine instructions to load x into a register, increment the register value, and store the register back into x. If x is initially 0, determine the expected value of x when both p and q terminate. 7) Modify the solution to the CS problem by reversing the will_wait assignment: p1 sets will_wait = 2 and p2 sets will_wait = 1. Thus each process, rather than expressing willingness to wait, states that the other process should wait if necessary. Which of the 4 requirements will be violated?

6) The following program is executed by 2 processes p and q concurrently for i = 1; i <= 3; i++ x = x + 1 The variable x is shared by the two processes. • The instruction x = x + 1 is compiled into 3 machine instructions to load x into a register, increment the register value, and store the register back into x. If x is initially 0, determine the expected value of x when both p and q terminate. 7) Modify the solution to the CS problem by reversing the will_wait assignment: p1 sets will_wait = 2 and p2 sets will_wait = 1. Thus each process, rather than expressing willingness to wait, states that the other process should wait if necessary. Which of the 4 requirements will be violated?

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

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