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

Which class used for multicasting in ip addressing scheme, In IP addressing...

In IP addressing scheme, class used for multicasting is: A class used for multicasting in IP addressing scheme is class D.

Connectives in first-order logic sentences, Connectives in first-order logi...

Connectives in first-order logic sentences - Artificial intelligence We may string predicates together into a sentence in the same way by utilising connectives that we did for

What are the limitations of mobile devices, What are the limitations of mob...

What are the limitations of mobile devices? For mobile devices we require both PC-integrated applications and specialized mobile services quite than repurposed website content.

What are the disadvantages of bespoke software, What are the disadvantages ...

What are the disadvantages of Bespoke Software -  Very dependent on suppliers of the software; if they go out of business there would be little or no support if problems occ

what is a real time system, A real time system is a computer system that u...

A real time system is a computer system that updates the information at the similar rate it receives it. Real time system is of two types:- a)  Hard real time system and

What is language of a model, What is language of a model?   Language of...

What is language of a model?   Language of a model is the collection of formulae that use only the relational symbols the model assign and that use every relation symbol with t

Explain synchronous dram, What is synchronous DRAM? Synchronous DRAM's ...

What is synchronous DRAM? Synchronous DRAM's are those whose operation is directly synchronized with a clock signal.

Recurrence relation, Take the following recurrence relation consider only f...

Take the following recurrence relation consider only for n = 2k for integers k ≥ 1: T(2) = 9, and for n ≥ 4, T(n) = n + T(n /2). Three students were working together in a stu

Data structure, explain different type of sparse matrix

explain different type of sparse matrix

Effect of tree supply on death rate, The effect of tree supply on death ra...

The effect of tree supply on death rate depends upon a ratio comparing the number of trees that are actually available per person per year to the desired number of trees per pers

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