Sorry, C++ is just wild guesswork for me ... Do your send and recv buffers in MPI_Reduce (&solution, &received_solution) overlap or are the same on root (0) ?

MPIR_Localcopy(123)......: memcpy arguments alias each other, dst=0x7fff40ad30e0 src=0x7fff40ad30c8 len=32

I guess you need to replace the send buffer by MPI_IN_PLACE on root, when using a single buffer. Or perhaps use different buffers. On 06/02/2014 07:15 PM, Jakub Łuczyński wrote:

P.S. for clarity

typedef long long m_entry_t;

On Tue, Jun 3, 2014 at 1:09 AM, Jakub Łuczyński <[email protected] <mailto:[email protected]>> wrote:

After installation of current version (3.1)

$ mpiexec -n 2 ~/tmp/opencl/msp-par.exe 10 10 1 Fatal error in PMPI_Reduce: Internal MPI error!, error stack: PMPI_Reduce(1259)........: MPI_Reduce(sbuf=0x7fff40ad30c8, rbuf=0x7fff40ad30e0, count=1, dtype=USER<struct>, op=0x98000000, root=0, MPI_COMM_WORLD) failed MPIR_Reduce_impl(1071)...: MPIR_Reduce_intra(822)...: MPIR_Reduce_impl(1071)...: MPIR_Reduce_intra(877)...: MPIR_Reduce_binomial(130): MPIR_Localcopy(123)......: memcpy arguments alias each other, dst=0x7fff40ad30e0 src=0x7fff40ad30c8 len=32 MPIR_Reduce_intra(842)...: MPIR_Reduce_impl(1071)...: MPIR_Reduce_intra(877)...: MPIR_Reduce_binomial(246): Failure during collective

On Tue, Jun 3, 2014 at 12:25 AM, Gus Correa <[email protected] <mailto:[email protected]>> wrote:

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/downloads/> http://www.mpich.org/__documentation/guides/ <http://www.mpich.org/documentation/guides/> http://wiki.mpich.org/mpich/__index.php/Using_the_Hydra___Process_Manager <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_... <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 <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/ <http://www.mpich.org/downloads/>

— Huiwei

On Jun 2, 2014, at 4:49 PM, Jakub Łuczyński <[email protected] <mailto:[email protected]>> 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 _________________________________________________ discuss mailing list [email protected] <mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/__mailman/listinfo/discuss <https://lists.mpich.org/mailman/listinfo/discuss>

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