The two variables a and b have initial values of 1 and 2, respectively. The following code is for a Linux system: Thread 1 a = 3; mb (); b=4; - - Thread 2 c = b; rmb(); d = a; What possible errors are avoided by the use of the memory barriers?

The two variables a and b have initial values of 1 and 2, respectively. The following code is for a Linux system: Thread 1 a = 3; mb (); b=4; - - Thread 2 c = b; rmb(); d = a; What possible errors are avoided by the use of the memory barriers?

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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Linux supports all available concurrent techniques. A lot of people don't.
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The two variables a and b have initial values of 1 and 2, respectively. The following code is for a Linux system: Thread 1 a = 3; mb (); b=4; - Thread 2 c = b; rmb(); d = a; What possible errors are avoided by the use of the memory barriers?
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The two variables a and b have initial values of 1 and 2, respectively. The following code is for a Linux system: Thread 1 a = 3; mb (); b=4; - Thread 2 c = b; rmb(); d = a; What possible errors are avoided by the use of the memory barriers?