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Debugging offsets in BinaryIO

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This commit is contained in:
Guido Cossu 2018-05-10 17:55:05 +01:00
parent 0064685bd7
commit fa5d8702cb
1 changed files with 16 additions and 17 deletions
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33
lib/parallelIO/BinaryIO.h
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@ -358,15 +358,15 @@ PARALLEL_CRITICAL
if ( (control & BINARYIO_LEXICOGRAPHIC) && (nrank > 1) ) { if ( (control & BINARYIO_LEXICOGRAPHIC) && (nrank > 1) ) {
#ifdef USE_MPI_IO #ifdef USE_MPI_IO
std::cout<< GridLogMessage<<"IOobject: MPI read I/O "<< file<< std::endl; std::cout<< GridLogMessage<<"IOobject: MPI read I/O "<< file<< " and offset " << offset << std::endl;
ierr=MPI_File_open(grid->communicator,(char *) file.c_str(), MPI_MODE_RDONLY, MPI_INFO_NULL, &fh); assert(ierr==0); ierr=MPI_File_open(grid->communicator,(char *) file.c_str(), MPI_MODE_RDONLY, MPI_INFO_NULL, &fh); assert(ierr==0);
ierr=MPI_File_set_view(fh, disp, mpiObject, fileArray, "native", MPI_INFO_NULL); assert(ierr==0); ierr=MPI_File_set_view(fh, disp, mpiObject, fileArray, "native", MPI_INFO_NULL); assert(ierr==0);
ierr=MPI_File_read_all(fh, &iodata[0], 1, localArray, &status); assert(ierr==0); ierr=MPI_File_read_all(fh, &iodata[0], 1, localArray, &status); assert(ierr==0);
MPI_Offset os; MPI_Offset os;
MPI_File_get_position(fh, &os); MPI_File_get_position(fh, &os);
MPI_File_get_byte_offset(fh, os, &disp); MPI_File_get_byte_offset(fh, os, &disp);
offset = disp; offset = disp;
MPI_File_close(&fh); MPI_File_close(&fh);
@ -379,21 +379,20 @@ PARALLEL_CRITICAL
std::cout << GridLogMessage <<"IOobject: C++ read I/O " << file << " : " std::cout << GridLogMessage <<"IOobject: C++ read I/O " << file << " : "
<< iodata.size() * sizeof(fobj) << " bytes and offset " << offset << std::endl; << iodata.size() * sizeof(fobj) << " bytes and offset " << offset << std::endl;
std::ifstream fin; std::ifstream fin;
fin.open(file, std::ios::binary | std::ios::in); fin.open(file, std::ios::binary | std::ios::in);
if (0)//control & BINARYIO_MASTER_APPEND) if (control & BINARYIO_MASTER_APPEND)
{ {
// Note Guido. Crosscheck this for the RNG case fin.seekg(-sizeof(fobj), fin.end);
// why the negative offset? }
fin.seekg(-sizeof(fobj), fin.end);
}
else else
{ {
fin.seekg(offset + myrank * lsites * sizeof(fobj)); fin.seekg(offset + myrank * lsites * sizeof(fobj));
} }
fin.read((char *)&iodata[0], iodata.size() * sizeof(fobj)); fin.read((char *)&iodata[0], iodata.size() * sizeof(fobj));
offset = fin.tellg();
assert(fin.fail() == 0); assert(fin.fail() == 0);
fin.close(); offset = fin.tellg();
fin.close();
} }
timer.Stop(); timer.Stop();