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

Define restoring method, Define restoring method? The hardware method j...

Define restoring method? The hardware method just explained is called the restoring method. The reason for this name is that the partial reminder is restored by adding the divi

What is the importance of hierarchy of operators, Bring out the importance ...

Bring out the importance of hierarchy of operators?  The operators  within  C are grouped  hierarchically according to their precedence(i.e., order of evaluation). Operations w

Should we use cgi or an api, APIs are proprietary programming interfaces su...

APIs are proprietary programming interfaces supported by certain platforms. By using an API, you lose all portability. If you know your application will only ever run on single pla

Where virtual memory is used, Where Virtual memory is used ? Ans. Virtu...

Where Virtual memory is used ? Ans. Virtual memory is utilized in all main commercial operating systems.

Explain the typical organization of a computer, Q. Explain the typical orga...

Q. Explain the typical organization of a computer? There are two principal components: hardware and software. The former refers to physical components such as memory unit (MU),

Career after BSc CS, Sir,wish to receive guidance from you how to join in A...

Sir,wish to receive guidance from you how to join in Aeronautical Engineering after Bsc Computer Science. I am a Girl.Interested to work in AE field, it will be better to use in co

Explain the difference between ram and rom, RAM: Read / Write memory, High ...

RAM: Read / Write memory, High Speed, Volatile Memory. ROM: Read only memory, Low Speed, Non Voliate Memory.   RAM- Random Access memory it is a Volatile Memory.  volatil

Graph to display the variable, We will be using data from the 2008 Canadian...

We will be using data from the 2008 Canadian General Election Study.1 The data can be found on the course page. As well, there are three other documents (loosely called "codebooks"

Explain parameter passing in procedures, Q. Explain Parameter Passing in Pr...

Q. Explain Parameter Passing in Procedures? Parameter passing is a very vital concept in assembly language. It makes assembly procedures more general. Parameter can be passed t

Dynamic programming problem, KK manufacturing company is faced with demand ...

KK manufacturing company is faced with demand for its product in each of the next four periods as shown in Table 1.  It must decide upon a production schedule to meet these demands

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