This class can set up a simulation from a snapshot generated by MPIIOWriter/ParallelMPIIOWriter. More...

#include <mpiioinitializer.h>

Collaboration diagram for LibGeoDecomp::MPIIOInitializer< CELL_TYPE >:

Public Types
typedef APITraits::SelectTopology < CELL_TYPE >::Value	Topology
Public Member Functions
	MPIIOInitializer (const std::string &filename, const MPI_Datatype &mpiDatatype=Typemaps::lookup< CELL_TYPE >(), const MPI_Comm &comm=MPI_COMM_WORLD)
virtual void	grid (GridBase< CELL_TYPE, DIM > *target)
	initializes all cells of the grid at target
virtual Coord< DIM >	gridDimensions () const
	returns the size of the gridBox().
virtual unsigned	maxSteps () const
	gives the time step at which the simulation should terminate.
virtual unsigned	startStep () const
	yields the logical time step at which the simulation should start
Static Public Attributes
static const int	DIM = Topology::DIM
Private Attributes
std::string	file
MPI_Datatype	datatype
MPI_Comm	communicator
unsigned	currentStep
unsigned	maximumSteps
Coord< DIM >	dimensions

Detailed Description

template<typename CELL_TYPE>
class LibGeoDecomp::MPIIOInitializer< CELL_TYPE >

This class can set up a simulation from a snapshot generated by MPIIOWriter/ParallelMPIIOWriter.

This is especially useful for long-running jobs which might either be shot down because of wall clock limitations or node failures: here checkpoints can save captital amounts of compute time.

Member Typedef Documentation

template<typename CELL_TYPE >

typedef APITraits::SelectTopology<CELL_TYPE>::Value LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::Topology

Reimplemented from LibGeoDecomp::Initializer< CELL_TYPE >.

Constructor & Destructor Documentation

template<typename CELL_TYPE >

LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::MPIIOInitializer	(	const std::string &	filename,
		const MPI_Datatype &	mpiDatatype = `Typemaps::lookup<CELL_TYPE>()`,
		const MPI_Comm &	comm = `MPI_COMM_WORLD`
	)			`[inline, explicit]`

References LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::communicator, LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::currentStep, LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::dimensions, LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::file, and LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::maximumSteps.

Member Function Documentation

template<typename CELL_TYPE >

virtual void LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::grid ( GridBase< CELL_TYPE, DIM > * target ) [inline, virtual]

initializes all cells of the grid at target

Implements LibGeoDecomp::Initializer< CELL_TYPE >.

References LibGeoDecomp::GridBase< CELL, DIMENSIONS >::boundingBox(), LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::communicator, LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::datatype, and LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::file.

template<typename CELL_TYPE >

virtual Coord<DIM> LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::gridDimensions ( ) const [inline, virtual]

returns the size of the gridBox().

Implements LibGeoDecomp::Initializer< CELL_TYPE >.

References LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::dimensions.

template<typename CELL_TYPE >

virtual unsigned LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::maxSteps ( ) const [inline, virtual]

gives the time step at which the simulation should terminate.

Example: if startStep is 0 and maxSteps is 10, then the Simulator should start at t=0, update to t=1, update to t=2, ... until it has updated to t=10.

If startStep is 5 and maxSteps is 8, then the Simulator is expected to init at t=5, update to t=6, update to t=7, and finally update to t=8.

Implements LibGeoDecomp::Initializer< CELL_TYPE >.

References LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::maximumSteps.

template<typename CELL_TYPE >

virtual unsigned LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::startStep ( ) const [inline, virtual]

yields the logical time step at which the simulation should start

Implements LibGeoDecomp::Initializer< CELL_TYPE >.

References LibGeoDecomp::MPIIOInitializer< CELL_TYPE >::currentStep.