Functions for message passing, Computer Engineering

Assignment Help:

Functions for Message Passing:

MPI processes don't share memory space and one process can't directly access other process's variables. Therefore they need some form of communication among themselves. In MPI environment this communication is in form of message passing. A message in MPI comprises the subsequent fields:

msgaddr: It can be any address in sender's address space and denotes to location in memory where message data begins.

count:  Number of amount of data items of message datatype comprised in message.

Source or dest: Rank of transmitting or receiving process in communicator.

Tag: Identifier for specific message or type of message. It permits the programmer to deal with the arrival of message in a systematic way even if the arrival of the message isn't orderly.

Comm.: Communicator. It is an object wrapping context in addition group of a process. It is allocated by system rather than user.


Related Discussions:- Functions for message passing

Associative memory organisations, Associative Memory Organisations The ...

Associative Memory Organisations The associative memory is organised in w words with b bits per word. In w x b array, every bit is known a cell. Each cell is made up of a flip-

Explain virtual memory, In a memory hierarchy system, data and programs are...

In a memory hierarchy system, data and programs are first stored in secondary or auxiliary memory. Program and its related data are brought in main memory for execution. What if th

How to export a dreamweaver document as xml file, Q. How to export a dreamw...

Q. How to export a dreamweaver document as xml file? Step 1: Choose File -> Open, Step 2: Select document which uses a template (and has editable regions) Step 3: Click O

Define class p, Define class P  The class of all sets L that can be kno...

Define class P  The class of all sets L that can be known in polynomial time by deterministic TM. The class of all decision problems that can be decided in polynomial time.

What is event-based simulator, Event-based Simulator Digital  Logic  S...

Event-based Simulator Digital  Logic  Simulation  method  sacrifices  performance  for  rich  functionality:  each active signal  is  calculated  for  every  device  it  propa

What is optical character recognition, What is Optical character recognitio...

What is Optical character recognition (OCR)  Information on paper is automatically read by a scanner and is then processed/analysed by OCR software and stored in an electronic

What are the mechanisms for implementing i/o operation, What are the variou...

What are the various mechanisms for implementing I/O operations? a) Program controlled I/O b) Interrupts c) DMA

Micooperation, please suggest me ,how to write microopertions,and study for...

please suggest me ,how to write microopertions,and study for computer architecture

Bidirectional search, Bidirectional Search: We've concentrated so far ...

Bidirectional Search: We've concentrated so far on the searches where the point of view for the search is to find a solution, but not the path to the solution. Like any other

What is bus arbitration, Q. What is Bus arbitration? In this technique,...

Q. What is Bus arbitration? In this technique, I/O interface first needs to control bus and only after that it can request for an interrupt. In this technique because only one

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