Mpirun не смог найти указанный исполняемый файл ⇐ C++

[Anonymous]

I have problems compiling this code using OpenMPI.Since I am a bit new to the concepts of using OpenMPI, it would be great if someone of you could give me a hint to the mistake here.
Compiling works just fine, but if I run the code I get this message:

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).
< /code>

Я компилируюсь с помощью: < /p>

mpic++ matmult.cpp -o matmult
< /code>

и запуск его с: < /p>

mpirun -n 2 matmult
< /code>

... и вот используемый код: < /p>

#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]