ok ty didnt realise that... but it aint working still...
On 7/4/05, David Cronk <cronk_at_[hidden]> wrote:
> You are sending from rank 0 to rank 0. You need to send to rank 1.
>
> Dave.
>
> Marcelo Fukushima wrote:
>
> >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
> >
> >
> >
> >
>
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>
--
[]'s
Marcelo Takeshi Fukushima
|
