hello guys!!! another noobish question...
im trying the simplest of all non-blocking routine and it simply locks up...
int main(int argc, char* argv[]) {
MPI_Request req;
MPI_Status status;
int size, rank;
int num, flag;
int i;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
printf ("starting waiting....\n");
if (rank == 1) {
//MPI_Irecv (&num, 1, MPI_INT, MPI_ANY_SOURCE, TAG,MPI_COMM_WORLD, &req);
//flag = 0;
//while (!flag){
MPI_Irecv (&num, 1, MPI_INT, MPI_ANY_SOURCE, TAG,MPI_COMM_WORLD, &req);
MPI_Wait (&req, &status);
printf ("Received: %d\n", num);
}
else if (rank == 0) {
num= 123;
scanf ("%d", &num);
printf ("Sending %d\n", num);
MPI_Send (&num, 1, MPI_INT, 0,TAG, MPI_COMM_WORLD);
}
printf ("%d is saying bye...\n", rank);
MPI_Finalize();
return 0;
---------------------------
bottom line is: im posting a receive without the sender has sent the
msg and it stucks... i also tried pooling the receive post with the
MPI_Test and also locks (the request never turn into a completed
one)... so, in more general words, what i want to do is a "preemptive"
check if there was any msg sent to this node... is there a way? cuz i
didnt find on the tutorials.... ty in advance
--
[]'s
Marcelo Takeshi Fukushima
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