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

Octave project, i need help with an octave program

i need help with an octave program

Define a technique of temporarily removing inactive program, is a technique...

is a technique of temporarily removing inactive programs from the memory of computer system? Swapping is a technique of temporarily eliminating inactive programs from the memor

Determine the abstraction mechanisms for modelling, Determine the abstracti...

Determine the abstraction mechanisms for modelling The object orientation conceptual structure helps in providing abstraction mechanisms for modelling, that includes: Cl

Designing e-cash based system, How can it be achieved in designing e-cash b...

How can it be achieved in designing e-cash based system? E-cash is essentially an online solution.  The buyer must validate the coins by the issuer in order to get the purchase

What are the concerns for growth of e-commerce in india, What are the conce...

What are the concerns for growth of e-commerce in India? Government as Facilitator for the growth of e-commerce has taken following steps: a. Promotion of competitive dataco

Drawbacks to having call centres overseas, Drawbacks to having call centres...

Drawbacks to having call centres overseas -  Culture and language problems -  Animosity to overseas call centres (resulting in loss of customers) -  need for extensive r

How do you create a permanent cookie, How do you create a permanent cookie?...

How do you create a permanent cookie?  By setting the expiry date of the cookie to a later on time (like 10 years later.)

Define operation code, Define Operation code. The Operation code of an ...

Define Operation code. The Operation code of an instruction is a group of  bits that explain such operations as add, sub, ,shift, mul and complement.

Describe data structures used during passes of assembler, Describe Data str...

Describe Data structures used during passes of assembler and their use. During passes of assembler, the Data structures define as: Pass 1 data base Input source pro

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