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

What is high level formatting, Q. What is High level formatting? In any...

Q. What is High level formatting? In any disk system the space at some time in use would become discarded and therefore will be free for other application. Operating system ass

Elaborate protected mode memory addressing in brief, Elaborate protected mo...

Elaborate protected mode memory addressing in brief. Protected mode interrupt: In protected mode, interrupts have exactly the same assignments as in real mode though int

Classes, write a program to copt values of object without using copy constr...

write a program to copt values of object without using copy constructor or = operator

Planning too much up front a mistake in an oosad, You can't plan only for t...

You can't plan only for the present phase of the project as your future activities are still coarse granular. To have good planning you require to have fine granularity w.r.t the t

Mathematical theorems, Proving ( or disproving) mathematical theorems are ...

Proving ( or disproving) mathematical theorems are an intensive intellectual task. This is because it requires deductions from hypotheses and also involves judgment. This judgm

What is asynchronous transmission, What is asynchronous transmission An...

What is asynchronous transmission An asynchronous transmission technique used in many interactive terminals employ special bits. With this method each character consists of thr

What is the meaning of toggle in a JK flip flop, In a JK Flip-Flop, toggle ...

In a JK Flip-Flop, toggle means ? Ans. Change the output to the opposite state implies the meas of toggle, in a JK Flip-Flop.

Instruction issue degree, Instruction Issue degree : The major concept in s...

Instruction Issue degree : The major concept in superscalar processing is how many instructions we can issue per cycle. If we issue k number of instructions per cycle in a supersca

Define the three prime processes of UML, Define the three prime processes o...

Define the three prime processes of uml The three prime processes were OMT (Rumbaugh), OOSE (Jacobson) and Booch. OMT was strong in analysis, while Booch was strong in design a

Explain dataflow computing, DATAFLOW COMPUTING A substitute to the Von ...

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 instruct

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