MPIenv Class Reference

MPI environment setup. More...

#include <MPImanager.h>

List of all members.

Public Member Functions
	MPIenv (int &argc, char **&argv, MPImanager *&_p)
bool	isMaster () const
unsigned int	slaveCount () const
unsigned int	slaveRank () 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

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Detailed Description

MPI environment setup.

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

Definition at line 120 of file MPImanager.h.

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Constructor & Destructor Documentation

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

Definition at line 40 of file MPImanager.cc.

References host, rank, and size.

{
#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 MPIslave();
#else
    size = 1;
    rank = 0;
    host = std::string( "local" );
#endif
}

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Member Function Documentation

void MPIenv::abort

(

int

i

)

[static]

Definition at line 60 of file MPImanager.cc.

Referenced by fatal().

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

void MPIenv::finish

(

MPImanager *

p

)

[static]

Definition at line 68 of file MPImanager.cc.

Referenced by SimRunner::run().

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

std::string MPIenv::hostName

(

)

const [inline]

Definition at line 129 of file MPImanager.h.

References host.

{ return host; }

bool MPIenv::isMaster

(

)

const [inline]

Definition at line 126 of file MPImanager.h.

References rank.

Referenced by StatHandler< SH >::execute(), BinaryDataSaver::finish(), FileHandler::init(), SimRunner::run(), and FileHandler::update().

{ return (rank==0); }

unsigned int MPIenv::slaveCount

(

)

const [inline]

Definition at line 127 of file MPImanager.h.

References size.

{ return size-1; }

unsigned int MPIenv::slaveRank

(

)

const [inline]

Definition at line 128 of file MPImanager.h.

References rank.

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

{ return rank; }

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Member Data Documentation

std::string MPIenv::host [private]

Definition at line 134 of file MPImanager.h.

Referenced by hostName(), and MPIenv().

unsigned int MPIenv::rank [private]

Definition at line 133 of file MPImanager.h.

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

unsigned int MPIenv::size [private]

Definition at line 132 of file MPImanager.h.

Referenced by MPIenv(), and slaveCount().

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

• MPImanager.h
• MPImanager.cc