Our initial thinking was first half of June, but that is subject to change
depending on severity of reported errors. FWIW: I don't believe we made any
romio changes between 1.8.1 and the current 1.8.2 state, so using 1.8.1 should
be a valid test.
On May 14, 2014, at 8:16 AM, Bennet Fauber <ben...@umich.edu> wrote:
> Is there an ETA for 1.8.2 general release instead of snapshot?
>
> Thanks, -- bennet
>
> On Wed, May 14, 2014 at 10:17 AM, Ralph Castain <r...@open-mpi.org> wrote:
>> You might give it a try with 1.8.1 or the nightly snapshot from 1.8.2 - we
>> updated ROMIO since the 1.6 series, and whatever fix is required may be in
>> the newer version
>>
>>
>> On May 14, 2014, at 6:52 AM, CANELA-XANDRI Oriol
>> <oriol.canela-xan...@roslin.ed.ac.uk> wrote:
>>
>>> Hello,
>>>
>>> I am using MPI IO for writing/reading a block cyclic distribution matrix
>>> into a file.
>>>
>>> It works fine except when there is some MPI threads with no data (i.e. when
>>> the matrix is small enough, or the block size is big enough that some
>>> processes in the grid do not have any matrix block). In this case, I
>>> receive an error when calling MPI_File_set_view saying that the data cannot
>>> be freed. I tried with 1.3 and 1.6 versions. When I try with MPICH it works
>>> without errors. Could this be a bug?
>>>
>>> My function is (where nBlockRows/nBlockCols define the size of the blocks,
>>> nGlobRows/nGlobCols define the global size of the matrix,
>>> nProcRows/nProcCols define the dimensions of the process grid, and fname is
>>> the name of the file.):
>>>
>>> void Matrix::writeMatrixMPI(std::string fname) {
>>> int dims[] = {this->nGlobRows, this->nGlobCols};
>>> int dargs[] = {this->nBlockRows, this->nBlockCols};
>>> int distribs[] = {MPI_DISTRIBUTE_CYCLIC, MPI_DISTRIBUTE_CYCLIC};
>>> int dim[] = {communicator->nProcRows, communicator->nProcCols};
>>> char nat[] = "native";
>>> int rc;
>>> MPI_Datatype dcarray;
>>> MPI_File cFile;
>>> MPI_Status status;
>>>
>>> MPI_Type_create_darray(communicator->mpiNumTasks, communicator->mpiRank, 2,
>>> dims, distribs, dargs, dim, MPI_ORDER_FORTRAN, MPI_DOUBLE, &dcarray);
>>> MPI_Type_commit(&dcarray);
>>>
>>> std::vector<char> fn(fname.begin(), fname.end());
>>> fn.push_back('\0');
>>> rc = MPI_File_open(MPI_COMM_WORLD, &fn[0], MPI_MODE_CREATE |
>>> MPI_MODE_WRONLY, MPI_INFO_NULL, &cFile);
>>> if(rc){
>>> std::stringstream ss;
>>> ss << "Error: Failed to open file: " << rc;
>>> misc.error(ss.str(), 0);
>>> }
>>> else
>>> {
>>> MPI_File_set_view(cFile, 0, MPI_DOUBLE, dcarray, nat, MPI_INFO_NULL);
>>> MPI_File_write_all(cFile, this->m, this->nRows*this->nCols, MPI_DOUBLE,
>>> &status);
>>> }
>>> MPI_File_close(&cFile);
>>> MPI_Type_free(&dcarray);
>>> }
>>>
>>> Best regards,
>>>
>>> Oriol
>>>
>>> --
>>> The University of Edinburgh is a charitable body, registered in
>>> Scotland, with registration number SC005336.
>>>
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>>> users mailing list
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>>
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