Definition
MPI_UINT16_T is an MPI_Datatype that represents an unsigned 2-byte integer type in MPI, it corresponds to an uint16_t in C.
Datatypes
C
MPI_UINT16_T is an MPI_Datatype that represents an unsigned 2-byte integer type in MPI, it corresponds to an uint16_t in C.
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <mpi.h>
/**
* @brief Illustrate how to communicate an unsigned 2-byte int between 2 MPI
* processes.
* @details This application is meant to be run with 2 MPI processes: 1 sender
* and 1 receiver. The former sends an unsigned 2-byte int to the latter, which
* prints it.
**/
int main(int argc, char* argv[])
{
MPI_Init(&argc, &argv);
// Check that 2 MPI processes are used.
int size;
MPI_Comm_size(MPI_COMM_WORLD, &size);
if(size != 2)
{
printf("This application is meant to be run with 2 MPI processes.\n");
MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
}
// Get my rank and do the corresponding job.
enum role_ranks { SENDER, RECEIVER };
int my_rank;
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
switch(my_rank)
{
case SENDER:
{
// Send the int
uint16_t intToSend = 12345;
printf("[MPI process %d] I send unsigned int: %u.\n", my_rank, intToSend);
MPI_Ssend(&intToSend, 1, MPI_UINT16_T, RECEIVER, 0, MPI_COMM_WORLD);
break;
}
case RECEIVER:
{
// Receive the int
uint16_t intReceived;
MPI_Recv(&intReceived, 1, MPI_UINT16_T, SENDER, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
printf("[MPI process %d] I received unsigned int: %u.\n", my_rank, intReceived);
break;
}
}
MPI_Finalize();
return EXIT_SUCCESS;
}
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
/**
* @brief Illustrate how to communicate an array of unsigned 2-byte ints between
* 2 MPI processes.
* @details This application is meant to be run with 2 MPI processes: 1 sender
* and 1 receiver. The former sends an array of unsigned 2-byte ints to the
* latter, which prints it.
**/
int main(int argc, char* argv[])
{
MPI_Init(&argc, &argv);
// Check that 2 MPI processes are used.
int size;
MPI_Comm_size(MPI_COMM_WORLD, &size);
if(size != 2)
{
printf("This application is meant to be run with 2 MPI processes.\n");
MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
}
// Get my rank and do the corresponding job.
enum role_ranks { SENDER, RECEIVER };
int my_rank;
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
switch(my_rank)
{
case SENDER:
{
// Send the ints
uint16_t intsToSend[2] = { 1234, 5678 };
printf("[MPI process %d] I send unsigned ints: %u and %u.\n", my_rank, intsToSend[0], intsToSend[1]);
MPI_Ssend(intsToSend, 2, MPI_UINT16_T, RECEIVER, 0, MPI_COMM_WORLD);
break;
}
case RECEIVER:
{
// Receive the ints
uint16_t intsReceived[2];
MPI_Recv(intsReceived, 2, MPI_UINT16_T, SENDER, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
printf("[MPI process %d] I received unsigned ints: %u and %u.\n", my_rank, intsReceived[0], intsReceived[1]);
break;
}
}
MPI_Finalize();
return EXIT_SUCCESS;
}