What is single program multiple data, Computer Engineering

Assignment Help:

Q. What is Single Program Multiple Data?

A general style of writing data parallel programs for MIMD computers is SPMD (single program, multiple data) means all processors execute same program however every processor operates on a separate part of problem data. It's easier to program than true MIMD however more flexible than SIMD. Though most parallel computers today are MIMD architecturally they are generally programmed in SPMD style. In this style though there is not any central controller the worker nodes carry on doing basically the same thing at effectively same time. Rather than central copies of control variables stored on control processor of a SIMD computer, control variables (iteration counts and so on) are generally stored in a replicated fashion across MIMD nodes. Every node has its own local copy of these global control variables however each node updates them in an identical way. There are no centrally issued parallel instructions however communications generally occur in well-defined collective phases. These data exchanges happen in a prefixed manner which implicitly or explicitly synchronizes the peer nodes. The condition is something such as an orchestra without a conductor. There is no central control however every particular plays from the same script. The group as a complete stays in lockstep. This loosely synchronous style has a number of similarities to Bulk Synchronous Parallel (BSP) model of computing introduced by theorist Les Valiant in early 1990's. The limited pattern of the collective synchronization is easier to deal with than complex synchronisation problems of a general concurrent programming.


Related Discussions:- What is single program multiple data

Which of the memories stores the most number of bits, Which of the memories...

Which of the memories stores the most number of bits ? Ans. most number of bits stores in 32M x 8 As 2 5 x 2 20   = 2 25 Therefore 1M = 2 20 = 1K x 1K = 2 10 x 2 10

For which class address 192.5.48.3 belogs, Address 192.5.48.3 belongs to? ...

Address 192.5.48.3 belongs to? Address 192.5.48.3 belongs to class C.

Explain about api s of olap, Microsoft in the late 1997 introduced a standa...

Microsoft in the late 1997 introduced a standard API called as OLE DB. After which XML was used for analysis specification and this specification was largely used by a lot of vendo

Write a program to find the area under the curve y = f(x) be, Write a progr...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b

Use verilog function to define the width of a multi-bit port, Can I use a V...

Can I use a Verilog function to define the width of a multi-bit port, wire, or reg type? Width  elements  of  ports,  wire  or  reg  declarations  require  a  constant  in  bot

Describe memory and memory unit, Q. Describe Memory and Memory unit? In...

Q. Describe Memory and Memory unit? Input devices can fetch instructions or data only sequentially though a program may or may not be executed sequentially because looping, jum

Difference among activity and sequence diagram, a. Activity diagram: Activi...

a. Activity diagram: Activity diagram is used for functional modelling. Captures the process flow. b.  Sequence diagram :  Sequence diagram is  used for dynamic modeling.

What is sdram, Synchronous dynamic random access memory (SDRAM) is dynamic ...

Synchronous dynamic random access memory (SDRAM) is dynamic random access memory (DRAM) that is initialized with the system bus. Classic DRAM has an asynchronous interface, which m

#title.linear programming, zmax=7.5x1-3x2 subject to constraints 3x1-x2-x3>...

zmax=7.5x1-3x2 subject to constraints 3x1-x2-x3>=3 x1-x2+x3>=2 x1,x2,x3>=0

Illustrate process of swapping system, What does the swapping system do if ...

What does the swapping system do if it identifies the illegal page for swapping? If the disk block descriptor does not have any record of the faulted page, then this causes the

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