medi::AMPI_Op Struct Reference

Structure for the special handling of the MPI_Op structure. More...

#include <op.hpp>

Public Member Functions
	AMPI_Op ()
	Default constructor for static initialization. More...
int	free ()
int	init (const bool requiresPrimal, const bool requiresPrimalSend, MPI_User_function *primalFunction, int primalFunctionCommute, MPI_User_function *modifiedPrimalFunction, int modifiedPrimalFunctionCommute, const PreAdjointOperation preAdjointOperation, const PostAdjointOperation postAdjointOperation)
	Creates an operator with a specialized adjoint handling. More...
void	init (MPI_Op op)
	Creates an operator that has no special adjoint handling. More...
int	init (MPI_User_function *user_fn, int commute)
	Creates an operator that has no special adjoint handling. More...

Public Attributes
bool	hasAdjoint
	Indicates if the user has provided a specialized adjoint handling for the operator. More...
MPI_Op	modifiedPrimalFunction
	The mpi operator for the modified AD types. This are the operations that are evaluated during the mpi transactions. More...
PostAdjointOperation	postAdjointOperation
	The operation that is evaluated on each adjoint after the values have been received in a message. More...
PreAdjointOperation	preAdjointOperation
	The operation that is evaluated on each adjoint value before they are send in a message. More...
MPI_Op	primalFunction
	The mpi operator for the unmodified AD types. The AD tool needs to record all operations that are evaluated with this operator. More...
bool	requiresPrimal
	Indicates if the primal on the sending and receiving side are required by this operator. More...
bool	requiresPrimalSend
	Indicates if the primal on the receiving side needs to be send to the sending side. More...

Detailed Description

Structure for the special handling of the MPI_Op structure.

The structure contains additional data for the AD evaluation and indicators what the operator requires.

Constructor & Destructor Documentation

AMPI_Op()

medi::AMPI_Op::AMPI_Op ( )

inline

Default constructor for static initialization.

On this constructed type one of the init method needs to be called.

Member Function Documentation

free()

int medi::AMPI_Op::free ( )

inline

init() [1/3]

int medi::AMPI_Op::init ( const bool  requiresPrimal, const bool  requiresPrimalSend, MPI_User_function *  primalFunction, int  primalFunctionCommute, MPI_User_function *  modifiedPrimalFunction, int  modifiedPrimalFunctionCommute, const PreAdjointOperation  preAdjointOperation, const PostAdjointOperation  postAdjointOperation  )

inline

Creates an operator with a specialized adjoint handling.

Parameters

[in]	requiresPrimal	If the adjoint operations require the primals in the sender/receiver side.
[in]	requiresPrimalSend	If the adjoint operation on the primal sending side requires the primal result of the primal receiving side.
[in]	primalFunction	The mpi function for the primal evaluation on the unmodified AD types. This function is called if the buffers are reduced locally and the reduction needs to be recorded by the AD tool.
[in]	primalFunctionCommute	If the primal function commutes.
[in]	modifiedPrimalFunction	The mpi function for the primal evaluation of the modifed AD types. This function is called during a MPI transaction, so the AD tool should not record anything.
[in]	modifiedPrimalFunctionCommute	If the modified primal function commutes.
[in]	preAdjointOperation	The operation that is evaluated on the adjoint values before they are send.
[in]	postAdjointOperation	The operation that is evaluated on the adjoint values after they are received.

Returns

result of MPI_Op_create

init() [2/3]

void medi::AMPI_Op::init ( MPI_Op  op )

inline

Creates an operator that has no special adjoint handling.

If AD types are in this operator, the reduce operations are evaluated locally by performing first a gather operation and the then the reduce.

The AD tool needs to record the opertions when the user function is evaluated.

Parameters

[in]

op

An existing MPI operator.

Returns

Result of MPI_Op_Create

init() [3/3]

int medi::AMPI_Op::init ( MPI_User_function *  user_fn, int  commute  )

inline

Creates an operator that has no special adjoint handling.

If AD types are in this operator, the reduce operations are evaluated locally by performing first a gather operation and the then the reduce.

The AD tool needs to record the opertions when the user function is evaluated.

Parameters

[in]	user_fn	The function for the operation.
[in]	commute	If the operations commutes.

Returns

Result of MPI_Op_Create

Member Data Documentation

hasAdjoint

bool medi::AMPI_Op::hasAdjoint

Indicates if the user has provided a specialized adjoint handling for the operator.

modifiedPrimalFunction

MPI_Op medi::AMPI_Op::modifiedPrimalFunction

The mpi operator for the modified AD types. This are the operations that are evaluated during the mpi transactions.

This operator is used when the user has created a specialized operator for the adjoint communication.

postAdjointOperation

PostAdjointOperation medi::AMPI_Op::postAdjointOperation

The operation that is evaluated on each adjoint after the values have been received in a message.

preAdjointOperation

PreAdjointOperation medi::AMPI_Op::preAdjointOperation

The operation that is evaluated on each adjoint value before they are send in a message.

primalFunction

MPI_Op medi::AMPI_Op::primalFunction

The mpi operator for the unmodified AD types. The AD tool needs to record all operations that are evaluated with this operator.

This operator is used when no specialized adjoint operation is available. Then the buffers are gathered and afterwards the reduction is performed locally.

requiresPrimal

bool medi::AMPI_Op::requiresPrimal

Indicates if the primal on the sending and receiving side are required by this operator.

requiresPrimalSend

bool medi::AMPI_Op::requiresPrimalSend

Indicates if the primal on the receiving side needs to be send to the sending side.

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The documentation for this struct was generated from the following file:

• include/medi/ampi/op.hpp