Explain the term instruction pipelines, Computer Networking

Assignment Help:

Instruction Pipelines

The stream of instructions in instruction execution cycle may be realized by a pipeline where overlapped executions of various operations are performed. The procedure of executing the instruction includes subsequent main steps:

  • Fetch the instruction from main memory
  • Decode the instruction
  • Fetch the operand
  • Execute the decoded instruction

These 4 steps turn out to be the candidates for phase for the pipeline that we know as instruction pipeline (It is displayed in Figure below).

1076_instruction pipelines.png

          Figure: Instruction Pipeline

Because in pipelined execution there is overlapped implementation of operations, the 4 phases of the instruction pipeline would work in overlapped manner. Firstly instruction address is fetched from memory to first phase of pipeline. First phase fetches the instruction and gives its output to second phase. Whereas second phase of the pipeline is decoding the instruction, the first phase gets other input as well as fetches the subsequent instruction. When the first instruction has been decoded in second phase then its o/p (output) is fed to the third stage. When third phase is fetching the operand for the first instruction then the second phase gets the second instruction in addition the first phase gets input for other instruction and so on. In this approach the pipeline is implementing the instruction in an overlapped way increasing the speed and throughput of execution.

The scenario of the overlapped operations in instruction pipeline can be explained by the space-time figure. In Figure, firstly we show the space-time figure for non-overlapped execution in a serial environment and then for the overlapped pipelined environment. It's clear from the two figures that in non-overlapped execution results are achieved only after 4 cycles as in overlapped pipelined execution after four cycles we are getting O/P (output) after every cycle. Soon in instruction pipeline the instruction cycle has been decreased to ¼ of the sequential execution.

2474_instruction pipelines 1.png


Related Discussions:- Explain the term instruction pipelines

State the disadvantages of ring topology, Point out the disadvantages of Ri...

Point out the disadvantages of Ring Topology. The drawbacks of ring topologies are: a. It is considerably complex to install and reconfigure ring topology b. Media failur

Explain the types of security threats, Q. Explain the types of Security Thr...

Q. Explain the types of Security Threats? (a) Normal Flow (b) Interruption: An asset of a system develops into unavailable or unusable. (c) Interception: A few unaut

What is the difference between arp and rarp, ARP - Address Resolution Proto...

ARP - Address Resolution Protocol It is the protocol that traces IP addresses to MAC addresses. RARP - Reverse Address Resolution Protocol It is the protocol within the TC

What is horizontal and vertical parity, What is horizontal and vertical par...

What is horizontal and vertical parity A single error can cause both horizontal and vertical parity checks to be wrong. Two errors can also be easily detected. If they are not

Error detection-redundancy, Q. Error Detection-Redundancy? In its p...

Q. Error Detection-Redundancy? In its place of repeating the entire data stream a shorter group of bits may be appended to the end of each unit. Called as -redundancy?

Explain about the switches, Explain about the Switches LAN switches are...

Explain about the Switches LAN switches are an expansion of the method in LAN bridging, which controls data flow, handles transmission errors, gives physical addressing, and ma

Enumerate about the virtual private network, Enumerate about the Virtual Pr...

Enumerate about the Virtual Private Network (VPN) Even though, many firewalls also include the features of the virtual private network, the functionality and capabilities of V

Factor causing parallel overheads, Factor Causing Parallel Overheads F...

Factor Causing Parallel Overheads Figure clearly explains that the performance metrics are not able to achieve a linear curve in comparison to the enhance in number of process

What is difference among rip and ripv2, RIP It is Broadcast There i...

RIP It is Broadcast There is no authentication It Support FLSM   RIPV2 It is Multicast There is Authentication It Support VLSM

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd