Openmp in shared memory programming, Computer Networking

Assignment Help:

OpenMP is a compiler directive based standard developed in the late 1990s jointly by a group of main computer hardware and software vendors. It is portable across a lot of popular platforms including Unix and Windows NT platforms. The OpenMP Fortran API was released on October 28, 1997 and the C/C++ API was released in late 1998. We shall talk about only about C/C++ API.

The OpenMP API uses the fork-join model of parallel implementation. As soon as an OpenMP program starts implementing it creates a single thread of implementation, known as the initial thread. The initial thread implements sequentially. As early as it gets a parallel construct, the thread makes additional threads and works as the master thread for all threads. All of the new threads implement the code inside the parallel construct. Only the master thread continues implementation of the user code beyond the end of the parallel construct. There is no restriction on the number of parallel constructs in a one program. When a thread with its child threads encounters a work-sharing construct, the work inside the construct is separated between the members of the team and implemented co-operatively instead of being implemented by every thread. Implementation of the code by every thread in the team resumes after the end of the work-sharing construct. Library routines and the Synchronization constructs are available in OpenMP to co-ordinate threads and data in parallel and work-sharing constructs.

Each OpenMP directive begins with #pragma omp. The general syntax is

#pragma omp directive-name [Set of clauses]

where omp is an OpenMP keyword. There may be additional clauses (parameters) after the directive name for dissimilar options.

Now, we shall talk about some compiler directives in OpenMP.


Related Discussions:- Openmp in shared memory programming

What are the features of intranet, What are the features of Intranet In...

What are the features of Intranet Intranets provide access to electronic databases, documents, electronic training manuals, office circulars, internal job vacancies, etc. Any t

Characteristics of the user private group scheme, Question: a) The cpi...

Question: a) The cpio utility has three operating modes. What are they? b) The characters of the permission string are broken up into three groups of three characters. Ex

Connection oriented transport tcp - transport layer, Connection Oriented Tr...

Connection Oriented Transport TCP In addition  to providing  reliable communication transmission control protocols  effects errors  control flow  control  and resequencing of

Sonet frame format - sonet sdh, SONET Frame Format SONET  uses  a basic...

SONET Frame Format SONET  uses  a basic  transmission  rate of STS -1 that  is equivalent to 51.84 mbps. Higher level  signals  are integer multiples of the base rate. For  exa

Design the user interface for mode switching, Design the user interface for...

Design the user interface for mode switching and data entry any way that you like. For example, to switch an application from transmit mode to receive mode, you can give it special

What is the advantage of address sharing, What is the advantage of address ...

What is the advantage of address sharing? By using address translation instead of routing, address sharing gives an inherent security benefit. That's because host PCs on the In

Example of parallel sections construct, This example demonstrates the use o...

This example demonstrates the use of parallel sections construct. The three functions, fun1, fun2, and fun3, all can be executed concurrently.  Note that all the section directives

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