ACA Unit 3 Notes

CS603(A) Advanced Computer Architecture Unit 3 study material for RGPV CSE 6th Semester. This unit covers linear and nonlinear pipeline processors, instruction pipelining, pipeline hazards, scoreboarding, Tomasulo’s algorithm and superscalar processor design.

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Unit 3 Overview

Unit 3 explains how pipelining improves processor performance by overlapping instruction execution. It also covers pipeline hazards, instruction scheduling and advanced processor techniques.

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Pipeline Processors

Learn linear and nonlinear pipeline processors with instruction execution stages.

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Pipeline Hazards

Understand structural, data and control hazards with prevention techniques.

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Superscalar Design

Study scoreboarding, Tomasulo’s algorithm and superscalar processor design.

Unit 3 Topics Covered

Complete syllabus-based topics of ACA Unit 3.

Linear Pipeline Processor

A pipeline where stages are connected in a fixed linear sequence and instructions move step by step.

Nonlinear Pipeline Processor

A pipeline where stages may be reused or connected in a non-sequential manner for complex operations.

Instruction Pipeline Design

Design of instruction execution stages like fetch, decode, execute, memory access and write back.

Instruction Pipelining Mechanism

Technique of overlapping multiple instruction executions to improve processor throughput.

Pipeline Hazards

Problems that prevent the next instruction from executing in the next clock cycle.

Dynamic Instruction Scheduling

Hardware-based scheduling technique that allows instructions to execute out of order.

Scoreboarding

A technique used to manage instruction execution and avoid hazards in pipelined processors.

Tomasulo’s Algorithm

A dynamic scheduling algorithm that uses reservation stations and register renaming.

Branch Handling Techniques

Methods used to reduce control hazard problems caused by branch instructions.

Arithmetic Pipeline Design

Pipeline design used for arithmetic operations like floating point addition and multiplication.

Multifunctional Arithmetic Pipelines

Pipelines capable of performing multiple arithmetic operations using shared stages.

Superscalar Processor Design

Processor design that can issue and execute multiple instructions in a single clock cycle.

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Upload your PDFs in the pdfs folder with the same file names used below.

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Detailed Notes

Complete ACA Unit 3 notes for exam preparation.

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Important Questions

Most expected RGPV questions from ACA Unit 3.

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PYQ Analysis

Previous year question analysis for scoring preparation.

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Important Questions - ACA Unit 3

These questions are useful for 7 marks and 14 marks answers in RGPV exams.

  1. Explain linear pipeline processor with diagram.
  2. Explain nonlinear pipeline processor.
  3. Differentiate between linear and nonlinear pipeline processors.
  4. Explain instruction pipeline design.
  5. Explain instruction pipelining mechanism with suitable example.
  6. What are pipeline hazards? Explain different types of hazards.
  7. Explain structural hazard, data hazard and control hazard.
  8. Explain methods to overcome pipeline hazards.
  9. Explain dynamic instruction scheduling.
  10. Explain scoreboarding technique.
  11. Explain Tomasulo’s algorithm.
  12. Differentiate between scoreboarding and Tomasulo’s algorithm.
  13. Explain branch handling techniques in pipeline processors.
  14. Explain arithmetic pipeline design.
  15. Explain static arithmetic pipeline.
  16. Explain multifunctional arithmetic pipeline.
  17. Explain superscalar pipeline design.
  18. Explain superscalar processor design with advantages.

PYQ Analysis Table

High-priority topics from ACA Unit 3 for RGPV exam preparation.

Topic Expected Frequency Importance
Linear Pipeline Processor High ⭐⭐⭐⭐⭐
Pipeline Hazards Very High ⭐⭐⭐⭐⭐
Dynamic Instruction Scheduling High ⭐⭐⭐⭐
Scoreboarding Very High ⭐⭐⭐⭐⭐
Tomasulo’s Algorithm Very High ⭐⭐⭐⭐⭐
Branch Handling Techniques Medium ⭐⭐⭐⭐
Arithmetic Pipeline High ⭐⭐⭐⭐
Superscalar Processor Design High ⭐⭐⭐⭐⭐

FAQs - ACA Unit 3

What is pipelining?

Pipelining is a technique where multiple instructions are overlapped in execution to improve processor performance.

What are pipeline hazards?

Pipeline hazards are problems that stop the next instruction from executing in the next clock cycle.

Which hazards are important?

Structural hazards, data hazards and control hazards are important for exams.

What is Tomasulo’s algorithm?

Tomasulo’s algorithm is a dynamic scheduling method that improves performance using reservation stations and register renaming.

Is Unit 3 important for RGPV exam?

Yes, pipeline hazards, scoreboarding, Tomasulo’s algorithm and superscalar processors are highly important topics.

What is a superscalar processor?

A superscalar processor can issue and execute more than one instruction in a single clock cycle.

Why Study ACA Unit 3?

Exam Point of View

Pipeline hazards, scoreboarding, Tomasulo’s algorithm and superscalar design are commonly asked in RGPV exams.

Interview Preparation

Pipelining, hazards and superscalar processors are important topics in computer architecture interviews.

Concept Foundation

This unit helps understand how modern processors achieve high speed and parallel execution.