The third argument to MPI_Group_incl() and MPI_Group_excl() is supposed to be
an array, not an integer constant. Have a look at the man page for these two
functions.
On Aug 16, 2012, at 3:30 PM, maryam moein wrote:
> I'm so sorry, Actually my problem is in another mpi program which is "sudoku
> game". But because of the fact I got inclusion error whenever I use
> MPI_Group_incl. For simplicity, I decided to put a simple program with
> MPI_Group_incl. Please take a look at the following lines of code, and please
> note that in this program I'm supposed to work just with 82 processes and I
> tried to divide the processes into 2 groups, namely "master" and "workers",
> master for "rank 0" process and workers for rest of processes(81 processes).
>
> Here is the codes:
>
> #include <string.h>
> #include "mpi.h"
> #include <stdio.h>
> #include <unistd.h>
> #include <time.h>
> #include <stdlib.h>
>
> int main(int argc, char *argv[])
> {
>
> //Initializing the MPI world, rank, and size
> int size,rank,m,w,i;
> MPI_Group group,master,workers;
> MPI_Comm comm_world, comm_workers, comm_master;
> MPI_Status status;
> MPI_Request request;
> MPI_Init(&argc, &argv);
> MPI_Comm_size(MPI_COMM_WORLD, &size);
> MPI_Comm_rank(MPI_COMM_WORLD, &rank);
> if (size != 82 ){
> printf("Please run with 82 processors.\n");
> fflush(stdout);
> MPI_Finalize();
> exit(1);
> }
> comm_world = MPI_COMM_WORLD;
> MPI_Comm_group(comm_world, &group);
> MPI_Group_incl(group, 1, 0 , &master);
> MPI_Group_excl(group, 1, 0, &workers);
> MPI_Comm_create(comm_world, master, &comm_master);
> MPI_Comm_create(comm_world, workers, &comm_workers);
> MPI_Finalize();
> }
>
> From: Jeff Squyres <[email protected]>
> To: Open MPI Users <[email protected]>
> Cc: maryam moein <[email protected]>
> Sent: Thursday, August 16, 2012 7:41 PM
> Subject: Re: [OMPI users] mpi_group_incl erros
>
> Further, if Neven is greater than 3, then you've got uninitialized values in
> the members array. That could be causing Open MPI to say "there's a bad rank
> number in there!", for example, if members[3] is randomly initialized to 1234.
>
>
> On Aug 16, 2012, at 10:01 AM, Ralph Castain wrote:
>
> > Well, one thing immediately leaps to the eye. You compute Neven based on
> > the number of procs in the job, which you set when executing mpirun.
> > However, the number of members you put in your group is fixed. Then you
> > pass Neven to the MPI_Group call as the parameter telling it how many
> > entries are in your member array!
> >
> > On Aug 16, 2012, at 5:07 AM, maryam moein <[email protected]>
> > wrote:
> >
> >> I'm new memeber in this weblog, and I should deliver my assignment as soon
> >> as possible, but I have a big problem that I can't solve it. Please help
> >> me. In MPI I should divide my group into two groups. But all the time when
> >> I want to run a program I got error about mpi_group_incl. This is my
> >> error:
> >>
> >> [ubuntu:3346] *** An error occurred in MPI_Group_incl
> >> [ubuntu:3346] *** on communicator MPI_COMM_WORLD
> >> [ubuntu:3346] *** MPI_ERR_RANK: invalid rank
> >> [ubuntu:3346] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> >> --------------------------------------------------------------------------
> >> mpiexec has exited due to process rank 0 with PID 3345 on
> >> node ubuntu exiting without calling "finalize". This may
> >> have caused other processes in the application to be
> >> terminated by signals sent by mpiexec (as reported here).
> >>
> >>
> >> I should mention that I run this program with diffrent number of process
> >> but I got same errors. In below you can find my c program.
> >>
> >> #include <stdio.h>
> >> #include "mpi.h"
> >> #include <unistd.h>
> >> #include <time.h>
> >> #include <stdlib.h>
> >> #include <string.h>
> >> void main(int argc, char *argv[])
> >> {
> >> int Iam, p;
> >> int Neven, Nodd, members[6], even_rank, odd_rank;
> >> MPI_Group group_world, even_group, odd_group;
> >> /* Starts MPI processes ... */
> >> MPI_Init(&argc, &argv); /* starts MPI */
> >> MPI_Comm_rank(MPI_COMM_WORLD, &Iam); /* get current process id */
> >> MPI_Comm_size(MPI_COMM_WORLD, &p); /* get number of processes */
> >> Neven = (p + 1)/2; /* All processes of MPI_COMM_WORLD are divided
> >> */
> >> Nodd = p - Neven; /* into 2 groups, odd- and even-numbered
> >> groups */
> >> members[0] = 2;
> >> members[1] = 0;
> >> members[2] = 4;
> >> MPI_Comm_group(MPI_COMM_WORLD, &group_world);
> >> MPI_Group_incl(group_world, Neven, members, &even_group);
> >> MPI_Group_excl(group_world, Neven, members, &odd_group);
> >>
> >> MPI_Barrier(MPI_COMM_WORLD);
> >> if(Iam == 0) {
> >> printf("MPI_Group_incl/excl Usage Example\n");
> >> printf("\n");
> >> printf("Number of processes is %d\n", p);
> >> printf("Number of odd processes is %d\n", Nodd);
> >> printf("Number of even processes is %d\n", Neven);
> >> printf("\n");
> >> printf(" Iam even odd\n");
> >> }
> >> MPI_Barrier(MPI_COMM_WORLD);
> >>
> >> MPI_Group_rank(even_group, &even_rank);
> >> MPI_Group_rank( odd_group, &odd_rank);
> >> printf("%d %d %d\n",Iam, even_rank, odd_rank);
> >>
> >> MPI_Finalize(); /* let MPI finish up ... */
> >> }
> >>
> >> _______________________________________________
> >> users mailing list
> >> [email protected]
> >> http://www.open-mpi.org/mailman/listinfo.cgi/users
> >
> > _______________________________________________
> > users mailing list
> > [email protected]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>
> --
> Jeff Squyres
> [email protected]
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
>
--
Jeff Squyres
[email protected]
For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/
