POSH

Paris OpenSHMEM http://lipn.univ-paris13.fr/~coti/POSH

What is it?

POSH (Paris OpenSHMEM) is an implementation of the OpenSHMEM standard [1] for shared-memory systems. It relies of the Boost library for inter-process communications. It is both a high-performance communication library, and a testbed for research on distributed algorithms on the communication model followed and implemented by OpenSHMEM.

[1] http://openshmem.org

Contents

POSH is made of several components:

• the libshmem.so library
• the run-time environment: spawn
• the compiler: shmemcc

The shmemcc compiler first performs an initial parsing of the source code in order to insert global, static variables handling. Then it calls your regular C++ compiler in order to generate the source code and link the executable binary with the libshmem library.

  shmemcc -O3 -Wall -o mycode mycode.c

The executable binary must be executed by the run-time environment:

  spawm -n 4 ./mycode

The Latest Version

Details of the latest version can be found on [2]. For details on this version, please see the file called NEWS.

[2] http://lipn.univ-paris13.fr/~coti/POSH

Dependencies

POSH was written en C++11.

POSH relies on:

• flex
• perl
• some parts of Boost: Boost.Interprocess, Boost.Thread and Boost.System

Installation

Please see the file called INSTALL.

Example code

A small piece of OpenSHMEM code was written and placed in the example/ directory. Please see the file called INSTALL for more information.

Major environment variables

• SHMEM_COMM_CHANNEL: set the communication channel (MPI, TCP, HUB...)
• SHMEM_COLL_TYPE: set the collective communication module (MPI, BINOMIAL)

Flat: put and get

bonimial: put only

Licensing

Please see the file called LICENSE.

Contact and author

Please see the file called AUTHOR.