This is an old version of mpich.
Is it perhaps still using the mpd ring?
[If so, you need to start the mpd ring, if not already set,
before you launch the job. But that method was phased out.]
It may be worth updating to the latest mpich stable
and use the current mpiexec (hydra) to launch the job.

http://www.mpich.org/downloads/
http://www.mpich.org/documentation/guides/
http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager

On 06/02/2014 06:03 PM, Lu, Huiwei wrote:

Hi Kuba,

Since it works with both Open MPI and BGP, it is most likely a problem of your MPICH installation or your platform.

We have stopped supporting the Windows platform a while ago due to lack of developer resources. Please refer to our FAQ for more information:
http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_Why_can.27t_I_build_MPICH_on_Windows_anymore.3F

If it is on windows platform, we recommend you use Microsoft MPI, which can be found here: http://msdn.microsoft.com/en-us/library/bb524831(v=vs.85).aspx

We also encourage you to use the latest MPICH on Linux or OSX platforms, which can be downloaded here: http://www.mpich.org/downloads/

—
Huiwei

On Jun 2, 2014, at 4:49 PM, Jakub Łuczyński <doubleloop@o2.pl> wrote:

I wrote my assignment using MPI, and tested it both locally on Open MPI (1.6.5) and on IBM Blue Gene/P (with mpi implementation provided by IBM). Everything worked fine. Turns out that our solutions are tested also in our labs where MPICH, is installed:

$ mpich2version
MPICH2 Version:        1.4.1p1

And when I run my solution there I get this strange error:
$ mpirun -n 2 msp-par.exe 10 10 1
Internal Error: invalid error code 409e10 (Ring ids do not match) in MPIR_Reduce_impl:1087
Fatal error in PMPI_Reduce: Other MPI error, error stack:
PMPI_Reduce(1270).....: MPI_Reduce(sbuf=0x7fff693a92e8, rbuf=0x7fff693a9300, count=1, dtype=USER<struct>, op=0x98000000, root=0, MPI_COMM_WORLD) failed
MPIR_Reduce_impl(1087):

I am literally out of ideas what is wrong!

Below source code fragments (c++):

struct msp_solution
{
    int x1, y1, x2, y2;
    m_entry_t max_sum;
    msp_solution();
    msp_solution(const pair<int, int> &c1, const pair<int, int> &c2, int max_sum);
    friend bool operator<(const msp_solution &s1, const msp_solution &s2);
};

void max_msp_solution(msp_solution *in, msp_solution *inout, int, MPI_Datatype*)
{
     *inout = max(*in, *inout);
}

// somewhere in code
{
     MPI_Datatype MPI_msp_solution_t;
     MPI_Op max_msp_solution_op;

     // create MPI struct from msp_solution
     MPI_Datatype types[] = { MPI_INT, MPI_LONG_LONG_INT };
     int block_lengths[] = { 4, 2 };
     MPI_Aint base_addr, x1_addr, max_sum_addr;
     MPI_Get_address(&collected_solution, &base_addr);
     MPI_Get_address(&collected_solution.x1, &x1_addr);
     MPI_Get_address(&collected_solution.max_sum, &max_sum_addr);

     MPI_Aint displacements[] =
     {
         x1_addr - base_addr,
         max_sum_addr - base_addr
     };

     MPI_Type_create_struct(2, block_lengths, displacements, types, &MPI_msp_solution_t);
     MPI_Type_commit(&MPI_msp_solution_t);

     // max reduction function
     MPI_Op_create((MPI_User_function *) max_msp_solution, 1, &max_msp_solution_op);

    ...

     msp_solution solution, received_solution;
     MPI_Comm comm,
     ...
     // comm is created using MPI_Comm_split
     // solution is initialized
     MPI_Reduce(&solution, &received_solution, 1, MPI_msp_solution_t, max_msp_solution_op , 0, MPI_COMM_WORLD);
     // ERROR above!!!
}


Is there some error in this? How can I make it run?
P.S. MPI_Send and MPI_Recv on my struct MPI_msp_solution_t seems to work fine

Thanks in advance!
Best regards,
Kuba
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