MPIenv Class Reference

MPI environment setup. More...

#include <MPImanager.h>

Collaboration diagram for MPIenv:

Public Member Functions
	MPIenv (int &argc, char **&argv, MPImanager *&_p)
bool	isMaster () const
unsigned int	workerCount () const
unsigned int	workerRank () const
std::string	hostName () const

Static Public Member Functions
static void	abort (int i)
static void	finish (MPImanager *p)

Private Attributes
unsigned int	size
unsigned int	rank
std::string	host

Detailed Description

MPI environment setup.

Provides basic node information: rank (0 is master, 1...size-1 are workers), hostname. Constructor creates the MPImanagers (Master or worker). This can be instantiated also in a single cpu situation, will return trivial values. The abort() function should always be used instead of exit().

Constructor & Destructor Documentation

MPIenv()

MPIenv::MPIenv	(	int &	argc,
		char **&	argv,
		MPImanager *&	_p
	)

{
#ifdef USE_MPI
  MPI::Init( argc, argv );
  size = MPI::COMM_WORLD.Get_size();
  rank = MPI::COMM_WORLD.Get_rank();
  int lhost;
  char *thost = new char[100];
  MPI::Get_processor_name(thost, lhost);
  host = std::string( thost, lhost );
  delete[] thost;
  if ( rank == 0 ) _p = new MPImaster(size-1);
  else             _p = new MPIworker();
#else
  size = 1;
  rank = 0;
  host = std::string( "local" );
#endif
}

References host, rank, and size.

Member Function Documentation

abort()

void MPIenv::abort ( int  i )

static

{
#ifdef USE_MPI
  MPI::COMM_WORLD.Abort(i);
#endif
  exit(i);
}

Referenced by abort(), and fatal().

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finish()

void MPIenv::finish ( MPImanager *  p )

static

{
#ifdef USE_MPI
  delete p;
  MPI::Finalize();
#endif
}

Referenced by SimRunner::run().

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hostName()

std::string MPIenv::hostName ( ) const

inline

{ return host; }

References host.

isMaster()

bool MPIenv::isMaster ( ) const

inline

{ return (rank==0); }

References rank.

Referenced by BinaryDataSaver::finish(), FileServices::init(), SimRunner::init_random_seed(), FileParser::read(), SimRunner::Replicate_LOOP(), SimRunner::run(), ParamManager::set_parameters(), and FileHandler::update().

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workerCount()

unsigned int MPIenv::workerCount ( ) const

inline

{ return size-1; }

References size.

Referenced by RAND::init().

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workerRank()

unsigned int MPIenv::workerRank ( ) const

inline

{ return rank; }

References rank.

Referenced by BinaryDataSaver::finish(), FileServices::getFirstReplicateFileName(), and RAND::init().

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Member Data Documentation

host

std::string MPIenv::host

private

Referenced by hostName(), and MPIenv().

rank

unsigned int MPIenv::rank

private

Referenced by isMaster(), MPIenv(), and workerRank().

size

unsigned int MPIenv::size

private

Referenced by MPIenv(), and workerCount().

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The documentation for this class was generated from the following files:

• MPImanager.h
• MPImanager.cc