Компиляция работает нормально, но если я запустил код, я получаю следующее сообщение:
Код: Выделить всё
mpirun was unable to find the specified executable file, and therefore
did not launch the job. This error was first reported for process
rank 0; it may have occurred for other processes as well.
NOTE: A common cause for this error is misspelling a mpirun command
line parameter option (remember that mpirun interprets the first
unrecognized command line token as the executable).
Код: Выделить всё
mpic++ matmult.cpp -o matmult
Код: Выделить всё
mpirun -n 2 matmult
Код: Выделить всё
#include
#include
#include
#define MASTER 0
#define FROM_MASTER 1
#define FROM_WORKER 2
// ---------------------------------------------------------------------------
// allocate space for empty matrix A[row][col]
// access to matrix elements possible with:
// - A[row][col]
// - A[0][row*col]
float **alloc_mat(int row, int col)
{
float **A1, *A2;
A1 = (float **)calloc(row, sizeof(float *)); // pointer on rows
A2 = (float *)calloc(row*col, sizeof(float)); // all matrix elements
for (int i = 0; i < row; i++)
A1[i] = A2 + i*col;
return A1;
}
// ---------------------------------------------------------------------------
// random initialisation of matrix with values [0..9]
void init_mat(float **A, int row, int col)
{
for (int i = 0; i < row*col; i++)
A[0][i] = (float)(rand() % 10);
}
// ---------------------------------------------------------------------------
// DEBUG FUNCTION: printout of all matrix elements
void print_mat(float **A, int row, int col, char *tag)
{
int i, j;
printf("Matrix %s:\n", tag);
for (i = 0; i < row; i++)
{
for (j = 0; j < col; j++)
printf("%6.1f ", A[i][j]);
printf("\n");
}
}
// ---------------------------------------------------------------------------
int main(int argc, char *argv[]) {
int numtasks;
int taskid;
int numworkers;
int source;
int dest;
int mtype;
int rows;
int averow, extra, offset;
double starttime, endtime;
float **A, **B, **C; // matrices
int d1, d2, d3; // dimensions of matrices
int i, j, k, rc; // loop variables
MPI_Status status;
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD,&taskid);
MPI_Comm_size(MPI_COMM_WORLD,&numtasks);
if (argc != 4) {
printf ("Matrix multiplication: C = A x B\n");
printf ("Usage: %s \n", argv[0]);
return 0;
}
if (numtasks < 2 ) {
printf("Need at least two MPI tasks. Quitting...\n");
MPI_Abort(MPI_COMM_WORLD,rc);
exit(1);
}
/* read user input */
d1 = atoi(argv[1]); // rows of A and C d1
d2 = atoi(argv[2]); // cols of A and rows of B d2
d3 = atoi(argv[3]); // cols of B and C d3
printf("Matrix sizes C[%d][%d] = A[%d][%d] x B[%d][%d]\n", d1, d3, d1, d2, d2, d3);
/* prepare matrices */
A = alloc_mat(d1, d2);
init_mat(A, d1, d2);
B = alloc_mat(d2, d3);
init_mat(B, d2, d3);
C = alloc_mat(d1, d3);
/* Code für den Manager */
if (taskid == MASTER) {
/*printf("matrix multiplikation withMPI\n");
printf("initializing arrays ...\n");
for (i=0; i
Подробнее здесь: [url]https://stackoverflow.com/questions/27539807/mpirun-was-unable-to-find-the-specified-executable-file[/url]