Explain dataflow computing, Computer Engineering

Assignment Help:

DATAFLOW COMPUTING

A substitute to the Von Neumann model of calculation is dataflow computation model. In the dataflow model, control is tied to flow of data. Order of instructions in the program not plays any role on execution order. Execution of an instruction may take place when all the data needed by an instruction are available. Data is in continuing flow independent of reusable memory cells in addition its availability begins execution. Because, data is obtainable for various instructions at same time, these instructions are able to be executed in parallel. 

For the reason of using parallelism in calculation, Data Flow Graph notation is used to signify computations. In data flow graph, nodes represent commands of the program as well as edges represent data dependency among instructions.  As an example, the dataflow graph for instruction z = w × (x + y) is shown in Figure below

 

1838_Explain dataflow computing.png

Figure: DFG for z = w × (x+y)

Data moves on edges of the graph in form of data tokens that comprise data values and status information. The asynchronous parallel calculation is determined by the firing rule that is expressed by means of tokens: a node of DFG can fire if there is a token on every of its input edges. If node fires then it consumes the input tokens, executes the connected operation and places result tokens on output edge. Graph nodes may be single instructions or tasks comprising multiple instructions. The benefit of the dataflow concept is that nodes of DFG may be self scheduled. Though, the hardware maintains to identify the availability of important data is much more complicated than von Neumann model. The Illustration of dataflow computer comprises MIT Tagged Token Data Flow architecture and Manchester Data Flow Machine.


Related Discussions:- Explain dataflow computing

Describe the basic aspects of ENIAC, Q. Describe the basic aspects of ENIAC...

Q. Describe the basic aspects of ENIAC? The main aspects of ENIAC can be summarized as: ENIAC was a general purpose-computing machine in that vacuum tube technology was

What is common control switching system, What is common control switching s...

What is common control switching system? Explain. Common Control Switching System: It is a functional block diagram of a common control switching system is demonstrated in figu

Different message types available in the abap/4, What are the different mes...

What are the different message types available in the ABAP/4 ? There are 5 types of message types available. E: ERROR W-WARNING I -INFORMATION A-ABNORMAL TERMINA

Process of an e-mail transfer across the internet, Q. Process of An e-mail ...

Q. Process of An e-mail transfer across the Internet? When you open your mail client to read your e-mail, this is what normally happens: 1. Mail client (Netscape Mail, Micro

Anu, write a program to find the area under the curve y=f(x) between x=a an...

write a program to find the area under the curve y=f(x) between x=a and y=b integrate y=f(x) between the limits of a and b. the area under a curve between two points can be found b

#chemistry, Please explain the construction and working of calomel electrod...

Please explain the construction and working of calomel electrode..

Era of first generation computers, Q. Era of first generation computers? ...

Q. Era of first generation computers? The trends that were encountered at the time of the era of first generation computers were: Centralized control in a single CPU (al

Explain about the arithmetic shift, Explain about the Arithmetic Shift ...

Explain about the Arithmetic Shift An arithmetic shift micro operation shifts the signed binary number to left or right. The effect of the arithmetic shift left operation is

Define about classes of object oriented modelling, Define about classes of ...

Define about classes of object oriented modelling A class is a collection of things, or concepts that have the same properties. Each of these concepts or things is known an obj

What is analysis and list its sub stages, What is analysis, list its sub st...

What is analysis, list its sub stages? Understand the requirement by constructing models. The goal of analysis is to state what need is to be done and not how it is to be done.

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