BSP on MPI library in C++
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README

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==================================================
version 0.4,

Original version of BSPonMPI
Copyright (C) 2006  WJ Suijlen

C++ Extensions, SCons scripts
Copyright (C) 2012  P Krusche

Contents
--------
This README answers the following questions
- What is BSPonMPI ?
- Why should I use BSPonMPI?
- Availability
- Prerequisites
- Usage: Compiling and Running
- Documentation
- Supported Platforms
- Support & Feedback

What is BPSonMPI?
-----------------
BSPonMPI is a platform independent software library for developing parallel
programs. It implements the BSPlib standard for the most part and runs on all
machines which have MPI. This last property is the main feature of this
library and with this feature it distinguishes itself from other libraries
such as the Oxford BSP Toolset and PUB.

NOTE: 
1) The BSPlib standard is implemented with ONE exception: A call to bsp_init()
is mandatory.
2) You can find the BSPlib standard at http://www.bsp-worldwide.org .


Why should I use BSPonMPI?
--------------------------
Nowadays there are two major BSPlib implementations: Oxford BSP Toolset and
PUB.  Both are implemented for specific hardware platforms (Cray T3E or
SGI Origin, etc...) and they have a platform independent version on top of
MPI.  However the architecture of their software library is optimised for the
use of hardware specific features. Building on top of MPI was never their
primary objective. So if your hardware/software is not supported by one of
these two libraries, then you should use BSPonMPI in combination with an MPI
library. 


Availability
------------
Download the latest release from https://github.com/pkrusche/bsponmpi


Prerequisites
-------------
To compile this library you need a
+ Compiler, linker, archiver, etc... (e.g. GNU Development tools)
+ an MPI library (e.g. MPICH, LAM/MPI, OpenMPI, etc.)
+ The Boost C++ libraries (http://www.boost.org)
+ Intel (R) Threading Building Blocks Library (http://threadingbuildingblocks.org/)

Optional:
+ BLAS for running benchmarks http://netlib.org/blas

Usage
------
Read the INSTALL file for installation instructions. 

* Compiling
BSPonMPI transforms a BSP program into an MPI program. Therefore you should
use your standard MPI compiler and/or add an MPI library to your linker
options. For example: when you have an MPI compiler 'mpicc' and you want to
compile your program example.c, you should do
$ mpicc -o example example.c -lbsponmpi
If you have to link your MPI programs to e.g. to the library 'mpi', do
$ cc -o example example.c -lmpi -lbsponmpi
Sometimes it matters in which order you pass your libraries to the linker. So
if it doesn't work, try reordering the linker/compiler arguments.

* Running
After compilation you program is an MPI program. Run it using the command you
always use to run MPI programs (or consult your system administrator)
e.g.
$ mpiexec -n 4 example
Runs the 'example' program on 4 processors when you use the MPICH library.

You may also have a look at the examples subdirectory.

Documentation
-------------
Several documents about the original BSPonMPI library (pre 0.3) are 
available on http://bsponmpi.sourceforge.net

* Architecture description, Code documentation
* A report on implementing the library:
  - Pros and Cons of the library
  - Methods used to speed up the library
  - Comparison to the Oxford BSP Toolset using a benchmark
* The (outdated in some places) Doxygen documentation can be made
  by running doxygen in the doc subdirectory.

NOTICE: The interface for initializing BSPonMPI programs has changed
        in this version. Documentation to follow soon. The new style
        can be seen in the examples.

        The version of BSPEdupack included here has been modified to 
        work with these changes.

Supported Platforms
-------------------
This library has been tested and found to work correctly on the following
machines:
 * AMD 64 Opteron
      64 bit, 4 processors
      Fedora Core 3, Linux 2.6
      LAM/MPI
 * Intel Pentium III (Coppermine)
      32 bit, 2 processors
      Fedora Core 2, Linux 2.6,
      MPICH, MPICH2 (1.0.3)
 * mobile AMD Athlon XP 1800+
      32 bit, 1 processor
      Suse 9.2, Linux 2.6
      MPICH
 * COMPAQ AlphaServer DS20E 666 Mhz
      Alpha EV67, 2 processors
      Debian 3.0,  Linux 2.2
      MPICH, LAM/MPI (7.1.2)
 * Sparc - R220
      2 processors
      Sun Solaris 9
      MPICH
 * IBM Power 5
      8 processors
      Suse 9.2, Linux 2.4
      MPICH2 (1.0.3)
 * SGI Origin 3800  (teras.sara.nl)
      MIPS R14000, 64 bit, 1024 processors (tested on up to 16 processors)
      IRIX 6.5
      SGI MPI
 * SGI Altix 3700 (aster.sara.nl)
      Intel Itanium 2, 64 bit, 416 processors (tested on up to 16 processors)
      Redhat Linux
      SGI MPI
 * Intel Core i7, MacOS X 10.6
 * Intel Core2 Duo/Quad, Ubuntu Linux 10.04, and Windows 7 64-bit

Note on testing: Testing is performed by doing a 'make check'. The test suite
doesn't catch all errors. Therefore it is possible that there are still a few
bugs in this library

Support & Feedback
------------------
This library has been tested, but not extensively. It may still contain bugs. 
If you have written a BSP program which doesn't work and you blame this
library, please contact me. On the other hand if you have written a BSP
program which works perfectly with BSPonMPI, let me know! I am curious.

Summarising: If you have any question, please also write to the mailing list

  bsponmpi-users@lists.sourceforge.net

or to 

	peter@dcs.warwick.ac.uk
  	wjsuijle@users.sourceforge.net

Feedback and participation are very welcome too. Please mail to the mail
address above.