MPIManager.h File Reference

Detailed Description

Author

Florian Schornbaum flori.nosp@m.an.s.nosp@m.chorn.nosp@m.baum.nosp@m.@fau..nosp@m.de

Martin Bauer marti.nosp@m.n.ba.nosp@m.uer@f.nosp@m.au.d.nosp@m.e

Christian Godenschwager chris.nosp@m.tian.nosp@m..gode.nosp@m.nsch.nosp@m.wager.nosp@m.@fau.nosp@m..de

#include "MPIWrapper.h"
#include "core/DataTypes.h"
#include "core/debug/Debug.h"
#include "core/math/Uint.h"
#include "core/singleton/Singleton.h"

Classes
class	walberla::mpi::MPIManager
	Encapsulates MPI Rank/Communicator information. More...

Namespaces
	walberla
	\file TimestepTracker.h \ingroup lbm \author Frederik Hennig frede.nosp@m.rik..nosp@m.henni.nosp@m.g@fa.nosp@m.u.de
	walberla::mpi

Macros
#define	WALBERLA_ROOT_SECTION()   if( ::walberla::MPIManager::instance()->worldRank() == 0 )
#define	WALBERLA_NON_ROOT_SECTION()   if( ::walberla::MPIManager::instance()->worldRank() != 0 )
#define	WALBERLA_EXCLUSIVE_SECTION(exclusive_rank)   if( ::walberla::MPIManager::instance()->rank() == (exclusive_rank) )
	Exclusive section is only executed on the process with the given rank. More...
#define	WALBERLA_EXCLUSIVE_WORLD_SECTION(exclusive_rank)   if( ::walberla::MPIManager::instance()->worldRank() == (exclusive_rank) )
	Exclusive section using ranks w.r.t. More...
#define	WALBERLA_MPI_WORLD_BARRIER()   {}
#define	WALBERLA_MPI_BARRIER()   {}
#define	WALBERLA_CRITICAL_SECTION_START
#define	WALBERLA_CRITICAL_SECTION_END

Macro Definition Documentation

WALBERLA_CRITICAL_SECTION_END

#define WALBERLA_CRITICAL_SECTION_END

WALBERLA_CRITICAL_SECTION_START

#define WALBERLA_CRITICAL_SECTION_START

WALBERLA_EXCLUSIVE_SECTION

#define WALBERLA_EXCLUSIVE_SECTION

(

exclusive_rank

)

if( ::walberla::MPIManager::instance()->rank() == (exclusive_rank) )

Exclusive section is only executed on the process with the given rank.

Warning

The rank here is with respect to MPIManager::comm() (not w.r.t. MPI_COMM_WORLD) These ranks are not valid until the block setup has been done. This means that WALBERLA_ROOT_SECTION() may be different than WALBERLA_EXCLUSIVE_SECTION(0) !! If an exclusive section is needed before the block setup has been done, the WALBERLA_EXCLUSIVE_WORLD_SECTION can be used.

WALBERLA_EXCLUSIVE_WORLD_SECTION

#define WALBERLA_EXCLUSIVE_WORLD_SECTION

(

exclusive_rank

)

if( ::walberla::MPIManager::instance()->worldRank() == (exclusive_rank) )

Exclusive section using ranks w.r.t.

MPI_COMM_WORLD.

WALBERLA_MPI_BARRIER

#define WALBERLA_MPI_BARRIER

(

)

{}

WALBERLA_MPI_WORLD_BARRIER

#define WALBERLA_MPI_WORLD_BARRIER

(

)

{}

WALBERLA_NON_ROOT_SECTION

#define WALBERLA_NON_ROOT_SECTION

(

)

if( ::walberla::MPIManager::instance()->worldRank() != 0 )

WALBERLA_ROOT_SECTION

#define WALBERLA_ROOT_SECTION

(

)

if( ::walberla::MPIManager::instance()->worldRank() == 0 )