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

Instruction set and effective addressing techniques, The term addressing mo...

The term addressing mode is a technique of stating the input and output of an instruction; it is termed the effective address. There are 6 effective addresses in the 68HC11 set of

Functionality of hyper thread processor, Hyper-threading works by duplicati...

Hyper-threading works by duplicating those sections of processor that kept the architectural state-but not duplicates the main implementation resources. This allows a Hyper-threadi

Explain telnet, Explain Telnet Telnet is a Remote Login.

Explain Telnet Telnet is a Remote Login.

Implementing new technologies, There is a free internet access to all their...

There is a free internet access to all their customers they also ensure 24 hours security and for the post of chief information officer when the candidate has come for an interview

Computer architecture, 6.How can we improve the performance of pipeline pro...

6.How can we improve the performance of pipeline processing

Explain importance of different types of distributing frames, Explain impor...

Explain importance of the different types of distributing frames used in exchanges. Here MDF = main distribution frame; MF = main feeder; FP = feeder point; BF = branch f

Search mechanisms in prolog - artificial intelligence, Search mechanisms in...

Search mechanisms in Prolog We can utilize this simple Prolog program to describe how Prolog searches: president(X) :- first_name(X, georgedubya), second_name(X, bush). p

Creates a grid-matrix of cells, 1. Write the function makegrid. This functi...

1. Write the function makegrid. This function accepts a width and height and creates a grid/matrix of cells. The width gives the number of columns and the height the number of rows

What is the purpose of zero (z) flag and carry (c) flag, What is the purpos...

What is the purpose of zero (z) flag and carry (c) flag? Carry flag holds the carry after addition or the borrow after subtraction. Carry flag also indicates error conditions,

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