#define EXIT_FAILURE 1
#endif
-#define MAXLEN 300000
+//define MAXLEN 300000
int main(int argc, char *argv[])
{
int *sb;
int *rb;
int status;
+ int mult=1;
MPI_Init(&argc, &argv);
+ int maxlen = argc >= 2 ? atoi(argv[1]) : 1;
+
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
-
- sb = (int *) xbt_malloc(size *MAXLEN * sizeof(int));
- rb = (int *) xbt_malloc(size *MAXLEN * sizeof(int));
+ if (maxlen>1)mult=size;
+ sb = (int *) xbt_malloc(size *maxlen * sizeof(int));
+ rb = (int *) xbt_malloc(size *maxlen * sizeof(int));
- for (i = 0; i < size *MAXLEN; ++i) {
+ for (i = 0; i < size *maxlen; ++i) {
sb[i] = rank*size + i;
rb[i] = 0;
}
printf("[%d] sndbuf=[", rank);
- for (i = 0; i < size *size; i++)
+ for (i = 0; i < size *mult; i++)
printf("%d ", sb[i]);
printf("]\n");
- status = MPI_Allreduce(sb, rb, size *MAXLEN, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
+ status = MPI_Allreduce(sb, rb, size *maxlen, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
printf("[%d] rcvbuf=[", rank);
- for (i = 0; i < size *size; i++)//do not print everything
+ for (i = 0; i < size *mult; i++)//do not print everything
printf("%d ", rb[i]);
printf("]\n");
