Performance and issues in pipelining-throughput, Computer Engineering

Performance and Issues in Pipelining

Throughput: Throughput of a pipeline can be defined as the number of results that have been getting per unit time. It can be denoted as:

                                                   T = n / [m + (n-1)]. c = E / c

Throughput signifies the computing power of the pipeline.

Maximum speed up, throughput and efficiency are the perfect cases but these are not achieved in the useful cases, as the speedup is limited due to the many factors:

  • Data dependency between successive tasks:There might be dependencies among the instructions of two tasks used in the pipeline. For example, one instruction cannot be going ahead until the previous instruction returns the results, as both are interdependent. One more instance of data dependency will be when that both instructions try to modify the similar data object. These are known as data hazards.
  • Resource Constraints: When resources are not available at the time of implementation then delays are caused in pipelining. For example, if single common memory is used for both instructions and data and there is require to read/write and fetch the instruction at the similar time then only one can be carried out and the other has to stay. One more example is of limited resource like implementation unit, which may be busy at the required time.
  • Branch Instructions and Interrupts in the program:A program is not a directly flow of sequential instructions. There may be branch instructions that modify the normal flow of program, which delays the pipelining implementation and affects the performance. Likewise, there are interrupts that postpones the implementation of next instruction until the interrupt has been serviced. Interrupt and the Branches have harmful effects on the pipelining.
Posted Date: 3/4/2013 4:25:33 AM | Location : United States







Related Discussions:- Performance and issues in pipelining-throughput, Assignment Help, Ask Question on Performance and issues in pipelining-throughput, Get Answer, Expert's Help, Performance and issues in pipelining-throughput Discussions

Write discussion on Performance and issues in pipelining-throughput
Your posts are moderated
Related Questions
Why is packet switching important? Give at least two reasons. Packet switching is significant due to the following two purposes: 1. A sender and the receiver require coordin

what isAdvantages of scan line algorithm, Computer Graphics?

The Concept of Program From a programmer's viewpoint, generally a program is a well-defined set of instructions written in a specific programming language, with predefined sets

Translator for low level programming language were termed as? Ans. Translator for low level programming language is called as Assembler.

a. Define parsing? Give difference among top down parsing and bottom up parsing. b. Determine the self-relocating programs? Why self-relocating programs are less efficient then

a. What are the benefits of hardwired and micro programmed control? b. Sketch neat diagram of single bus organization of CPU showing ALU, all types of registers and the data pat

A disk drive with removable disks is known as removable drive. A removable disk can be replaced by other similar disk on same or different computer so providing huge data storage w

Virtual Manufacturing System Virtual manufacturing system or VMS is a synthetic, integrated manufacturing environment, developed by using information technology tools, exercise

haw to convert context free grammar to regular grammar

Q. Block Format and Disk Layout on CD-ROM? A typical block format is displayed in Figure (a). It comprises the subsequent fields: Sync: Sync field identifies beginning o