Instruction Pipelining

By : Manglika Tripathi

Updated : Feb 26, 2021, 5:32

Instruction Pipelining refers to designing a teaching application that enables multiple tasks to be executed in parallel on a central processing unit or CPU. In computer science, instruction pipelining implies a methodology for implementing instruction-level parallelism in a single CPU.

The main purpose of instruction pipelining in a Multi-chip System is to divide the overall workload of a processor workload into small parts. The execution of multiple commands can be accomplished on different processors within the same machine.

Important Instruction Pipelining Topics for GATE CS

Instruction Pipelining topics cover a whole range of different concepts to cover. The Instruction Pipelining GATE syllabus comprises the following essential issues held in the Instruction Pipelining quiz. So, it is necessary to know how to apply these concepts in each specific exam topic.



Machine instructions

Machine instructions are used in various situations to provide software with the information it needs to execute the program as intended. These instructions can be completed in many different ways, including through an operating system or application software package, in a virtual machine, or within an abstraction layer such as Java.


Short for cache co-terminator - is one of the most integral parts of the cache hierarchy in the distributed computing environment. In computing, a cache is any software or hardware component that stores data so that subsequent calls for that information can be served quickly; the contents of a cache may result from a previous computation or a saved copy of data elsewhere.

Memory Hierarchy

In computer architecture, the memory hierarchy depicts the hierarchy of computer memory according to response time. The most significant nodes are stored in address bus programming interfaces (ABPs), device address buses (DIDs), memory-mapped files (MMFs), or in shared memory abstraction (SHM).

Main Memory

In information technology, main memory refers to an entity used to hold data for future use on a computer or other computer-related computer hardware device, such as a scanner. It usually refers to non-volatile memory, which means it can be erased and rewritten, although it is most commonly not.

Secondary Storage

There are secondary storage types on a computer system: hard disk drives, solid-state drives, and virtual memory (movable storage disks). A Solid-state drive is a bit like an ordinary hard drive with one significant difference: it has no moving parts at all, so it's always in motion, always ready to be used. Virtual memory is what makes your computer run when you don't have any physical memory for it - you just turn it on and start using it.

Tips for Solving the Instruction Pipelining Questions for GATE

Here are some tips for solving the Instruction Pipelining online test and Instruction Pipelining online quiz. These include:

  • Execute multiple instructions simultaneously to make the pipeline more efficient while solving related problems.
  • Make use of separate data memory to resolve the pipeline conflicts.
  • Resolve data hazards in pipelining by inserting a pipeline bubble after encountering a read after write (RAW) dependency, which increases latency.
  • Implement ‘out-of-order execution’ to prevent the requirement for pipeline bubbles.

Importance of Instruction Pipelining in GATE

With the aid of Instruction-Pipelining, a programmer or system administrator's workload is split between multiple processors to execute various tasks simultaneously. And it has its importance also, as referred in Instruction Pipelining notes for CS, like -

  • With the aid of an advanced pipeline, as in the exam, the instruction throughout increases.
  • The GATE exam is the technique used in the design of modern microprocessors, microcontrollers, and CPUs.
  • While in the GATE exam, an instruction pipeline reads along with the relevant instructions from memory, with previous instructions being executed in additional segments of the pipeline.
  • Buffer pipelining is implemented during the instruction pipeline in the exam.

Moreover, the Instruction Pipelining for computer science, Civil, Electrical, Mechanical, and ECE requires proper attention, owing to its importance in GATE.

Most Recommended Instruction Pipelining Books for GATE

The following Instruction Pipelining books cover all the topics, a part of the Instruction Pipelining syllabus for GATE. They help in easy preparation with Instruction Pipelining

the study material for GATE CS for the exam.



Computer Architecture: A Quantitative Approach

David A. Patterson

Computer Organization and Design MIPS Edition: The Hardware/Software Interface

Patterson, David A., John L. Hennessy

Digital Logic And Computer Design

M. Morris Mano

Computer Architecture and Organization

Hayes, John P

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Q. Define instruction pipelining

Instruction Pipelining is an innovative new approach to teaching software in multiple locations. In computer engineering, instruction pipelining is a method for applying instruction-level parallelism on a single CPU.

Q. State the five phases of pipelining?

Five phases of the RISC pipeline with their respective processes:

  • Phase 1 (Fetching Instruction)
  • Phase 2 (Decode Instruction)
  • Phase 3 (Execute Instruction)
  • Phase 4 (Memory Access)
  • Phase 5 (Write Back)

Q. What is the full form of RISC?

The full form of RISC is Reduced Instruction Set Computer

Q.What is the significance of pipelining

Pipelining is an implementation technique whereby multiple instructions are overlapped in execution. It takes advantage of the parallelism that exists.

Q.What are the necessary performances in pipelining issues?

Imbalance among the pipe stages reduces performance. The clock can run no faster than the time needed for the slowest pipeline stage.