Explain the concept of instruction reordering in a pipeline and its role in enhancing processor throughput.
Explain the concept of instruction reordering in a pipeline and its role in enhancing processor throughput.
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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Explain the concept of instruction reordering in a pipeline and its role in enhancing processor throughput.
Expert Solution

Step 1: Conceptual Overview:
Pipelined processors employ instruction reordering to enhance the processors throughput, which refers to instruction level parallelism (ILP).
The processor's instructions are divided into stages, each operating fetching, decoding, executing, and writing back.
The purpose of instruction reordering is to perfect the execution of instructions by changing their order without affecting the correctness of the program.
Its main goal is to minimize stalls and maximize resource use, improving the processor's performance.
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