Point-2-Point Communication¶

Located in file: MEL.hpp

void MEL::Send(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Send num elements of a derived type from the given address.

See

MPI_Send

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Bsend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Buffered send num elements of a derived type from the given address.

See

MPI_Bsend

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Ssend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Synchronous send num elements of a derived type from the given address.

See

MPI_Ssend

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Rsend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Ready send num elements of a derived type from the given address.

See

MPI_Rsend

Warning

Requires that the matching Recieve has already been posted! Programmer is responsible for making a correct program.

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Isend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Send num elements of a derived type from the given address

See

MPI_Isend

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

Request MEL::Isend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Send num elements of a derived type from the given address

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Ibsend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Buffered send num elements of a derived type from the given address

See

MPI_Ibsend

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

Request MEL::Ibsend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Buffered send num elements of a derived type from the given address

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Issend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Synchronous send num elements of a derived type from the given address

See

MPI_Issend

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

Request MEL::Issend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Synchronous send num elements of a derived type from the given address

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

void MEL::Irsend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Ready send num elements of a derived type from the given address

See

MPI_Irsend

Warning

Requires that the matching Recieve has already been posted!Programmer is responsible for making a correct program.

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

Request MEL::Irsend(const void *ptr, const int num, const Datatype &datatype, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Ready send num elements of a derived type from the given address

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• datatype -

  The derived datatype of the elements

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Send(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Send num elements of a derived type from the given address.

Element size determined by template parameter

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Bsend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Buffered send num elements of a derived type from the given address.

Element size determined by template parameter

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Ssend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Synchronous send num elements of a derived type from the given address.

Element size determined by template parameter

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Rsend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Ready send num elements of a derived type from the given address.

Element size determined by template parameter

Warning

Requires that the matching Recieve has already been posted! Programmer is responsible for making a correct program.

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Isend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Send num elements of a derived type from the given address. Element size determined by template parameter

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

template <typename T>

Request MEL::Isend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Send num elements of a derived type from the given address. Element size determined by template parameter

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Ibsend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Buffered send num elements of a derived type from the given address. Element size determined by template parameter

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

template <typename T>

Request MEL::Ibsend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Buffered end num elements of a derived type from the given address. Element size determined by template parameter

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Issend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Synchronous send num elements of a derived type from the given address. Element size determined by template parameter

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

template <typename T>

Request MEL::Issend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Synchronous end num elements of a derived type from the given address. Element size determined by template parameter

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

void MEL::Irsend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Ready send num elements of a derived type from the given address. Element size determined by template parameter

Warning

Requires that the matching Recieve has already been posted! Programmer is responsible for making a correct program.

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

• rq -

  A request object

template <typename T>

Request MEL::Irsend(const T *ptr, const int num, const int dst, const int tag, const Comm &comm)¶

Non-Blocking.

Ready end num elements of a derived type from the given address. Element size determined by template parameter

Warning

Requires that the matching Recieve has already been posted! Programmer is responsible for making a correct program.

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory to be sent

• num -

  The number of elements to send

• dst -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

Status MEL::Probe(const int source, const int tag, const Comm &comm)¶

Probe an incoming message to predetermine its contents.

See

MPI_Probe

Return

Returns a status object

Parameters

• source -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

std::pair<bool, Status> MEL::Iprobe(const int source, const int tag, const Comm &comm)¶

Non-Blocking.

Probe an incoming message to predetermine its contents

See

MPI_Iprobe

Return

Returns a std::pair of a bool representing if a message was available and status object for that message

Parameters

• source -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

template <typename T>

int MEL::ProbeGetCount(const MPI_Status &status)¶

Probe the length of an incoming message.

Element type is determined from the template parameter

See

MPI_Get_count

Return

Returns the number of elements in the message

Parameters

• status -

  A status object containing the rank and tag for the message

int MEL::ProbeGetCount(const Datatype &datatype, const Status &status)¶

Probe the length of an incoming message.

See

MPI_Get_count

Return

Returns the number of elements in the message

Parameters

• datatype -

  The derived datatype of the elements

• status -

  A status object containing the rank and tag for the message

template <typename T>

int MEL::ProbeGetCount(const int src, const int tag, const Comm &comm)¶

Probe the length of an incoming message.

Element type is determined from the template parameter

Return

Returns the number of elements in the message

Parameters

• src -

  The rank of the process to send to

• tag -

  A tag for the message

• comm -

  The comm world to send within

int MEL::ProbeGetCount(const Datatype &datatype, const int src, const int tag, const Comm &comm)¶

Probe the length of an incoming message.

Return

Returns the number of elements in the message

Parameters

• datatype -

  The derived datatype of the elements

• src -

  The rank of the process to probe from

• tag -

  A tag for the message

• comm -

  The comm world to receive within

Status MEL::Recv(void *ptr, const int num, const Datatype &datatype, const int src, const int tag, const Comm &comm)¶

Recieve a message of known length into the given pointer.

See

MPI_Recv

Return

Returns a status object

Parameters

• ptr -

  Pointer to the memory receive into

• num -

  The number of elements to receive

• datatype -

  The derived datatype of the elements

• src -

  The rank of the process to receive from

• tag -

  A tag for the message

• comm -

  The comm world to receive within

void MEL::Irecv(void *ptr, const int num, const Datatype &datatype, const int src, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Recieve a message of known length into the given pointer

See

MPI_Irecv

Parameters

• ptr -

  Pointer to the memory receive into

• num -

  The number of elements to receive

• datatype -

  The derived datatype of the elements

• src -

  The rank of the process to receive from

• tag -

  A tag for the message

• comm -

  The comm world to receive within

• rq -

  A request object

Request MEL::Irecv(void *ptr, const int num, const Datatype &datatype, const int src, const int tag, const Comm &comm)¶

Non-Blocking.

Recieve a message of known length into the given pointer

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory receive into

• num -

  The number of elements to receive

• datatype -

  The derived datatype of the elements

• src -

  The rank of the process to receive from

• tag -

  A tag for the message

• comm -

  The comm world to receive within

template <typename T>

Status MEL::Recv(T *ptr, const int num, const int src, const int tag, const Comm &comm)¶

Recieve a message of known length into the given pointer.

Element size is determined from the template parameter

Return

Returns a status object

Parameters

• ptr -

  Pointer to the memory receive into

• num -

  The number of elements to receive

• src -

  The rank of the process to receive from

• tag -

  A tag for the message

• comm -

  The comm world to receive within

template <typename T>

void MEL::Irecv(T *ptr, const int num, const int src, const int tag, const Comm &comm, Request &rq)¶

Non-Blocking.

Recieve a message of known length into the given pointer. Element size is determined from the template parameter

Parameters

• ptr -

  Pointer to the memory receive into

• num -

  The number of elements to receive

• src -

  The rank of the process to receive from

• tag -

  A tag for the message

• comm -

  The comm world to receive within

• rq -

  A request object

template <typename T>

Request MEL::Irecv(T *ptr, const int num, const int src, const int tag, const Comm &comm)¶

Non-Blocking.

Recieve a message of known length into the given pointer. Element size is determined from the template parameter

Return

Returns a request object

Parameters

• ptr -

  Pointer to the memory receive into

• num -

  The number of elements to receive

• src -

  The rank of the process to receive from

• tag -

  A tag for the message

• comm -

  The comm world to receive within