Why does ompi_info -c say "MPI I/O Support: yes" even though I configured using
-disable-io-romio? If ompi_info is going to tell me MPI I/O is supported, then
shouldn't I expect my test program (attached) to work correctly? (it doesn't).
I didn't disable "built-in" mpi-io, only io-romio.
--disable-mpi-io Disable built-in support for MPI-2 I/O, likely
because an externally-provided MPI I/O package will
be used. Default is to use the internal component
system and its specially modified version of ROMIO
--disable-io-romio Disable the ROMIO MPI-IO component
Thanks,
Ed
configure options used:
+ ./configure --prefix=/applocal/tools/mpi/intel/openmpi-1.6.4 --without-tm
--without-sge --without-lsf --without-psm --without-portals --without-elan
--without-slurm --without-loadleveler --with-mxm=/opt/mellanox/mxm
--with-mxm-lib=/opt/mellanox/mxm/lib --enable-mpirun-prefix-by-default
--enable-contrib-no-build=vt --disable-per-user-config-files --disable-io-romio
--enable-static CXX=/applocal/intel/composer_xe_2013/bin/icpc
CC=/applocal/intel/composer_xe_2013/bin/icc 'CFLAGS= -O2' 'CXXFLAGS= -O2'
F77=/applocal/intel/composer_xe_2013/bin/ifort 'FFLAGS=-D_GNU_SOURCE -traceback
-O2' FC=/applocal/intel/composer_xe_2013/bin/ifort 'FCFLAGS=-D_GNU_SOURCE
-traceback -O2' 'LDFLAGS= -static-intel'
ompi_info -c output:
Configured by: bloscel
Configured on: Tue Jun 11 16:20:00 CDT 2013
Configure host: mgmt1
Built by: bloscel
Built on: Tue Jun 11 16:35:12 CDT 2013
Built host: mgmt1
C bindings: yes
C++ bindings: yes
Fortran77 bindings: yes (all)
Fortran90 bindings: yes
Fortran90 bindings size: small
C compiler: /applocal/intel/composer_xe_2013/bin/icc
C compiler absolute:
C compiler family name: INTEL
C compiler version: 1310.20130514
C char size: 1
C bool size: 1
C short size: 2
C int size: 4
C long size: 8
C float size: 4
C double size: 8
C pointer size: 8
C char align: 1
C bool align: 1
C int align: 4
C float align: 4
C double align: 8
C++ compiler: /applocal/intel/composer_xe_2013/bin/icpc
C++ compiler absolute: none
Fortran77 compiler: /applocal/intel/composer_xe_2013/bin/ifort
Fortran77 compiler abs:
Fortran90 compiler: /applocal/intel/composer_xe_2013/bin/ifort
Fortran90 compiler abs:
Fort integer size: 4
Fort logical size: 4
Fort logical value true: -1
Fort have integer1: yes
Fort have integer2: yes
Fort have integer4: yes
Fort have integer8: yes
Fort have integer16: no
Fort have real4: yes
Fort have real8: yes
Fort have real16: no
Fort have complex8: yes
Fort have complex16: yes
Fort have complex32: no
Fort integer1 size: 1
Fort integer2 size: 2
Fort integer4 size: 4
Fort integer8 size: 8
Fort integer16 size: -1
Fort real size: 4
Fort real4 size: 4
Fort real8 size: 8
Fort real16 size: 16
Fort dbl prec size: 8
Fort cplx size: 8
Fort dbl cplx size: 16
Fort cplx8 size: 8
Fort cplx16 size: 16
Fort cplx32 size: 32
Fort integer align: 1
Fort integer1 align: 1
Fort integer2 align: 1
Fort integer4 align: 1
Fort integer8 align: 1
Fort integer16 align: -1
Fort real align: 1
Fort real4 align: 1
Fort real8 align: 1
Fort real16 align: 1
Fort dbl prec align: 1
Fort cplx align: 1
Fort dbl cplx align: 1
Fort cplx8 align: 1
Fort cplx16 align: 1
Fort cplx32 align: 1
C profiling: yes
C++ profiling: yes
Fortran77 profiling: yes
Fortran90 profiling: yes
C++ exceptions: no
Thread support: posix (MPI_THREAD_MULTIPLE: no, progress: no)
Sparse Groups: no
Build CFLAGS: -DNDEBUG -O2 -finline-functions -fno-strict-aliasing
-restrict -pthread
Build CXXFLAGS: -DNDEBUG -O2 -finline-functions -pthread
Build FFLAGS: -D_GNU_SOURCE -traceback -O2
Build FCFLAGS: -D_GNU_SOURCE -traceback -O2
Build LDFLAGS: -export-dynamic -static-intel
Build LIBS: -lrt -lnsl -lutil
Wrapper extra CFLAGS: -pthread
Wrapper extra CXXFLAGS: -pthread
Wrapper extra FFLAGS:
Wrapper extra FCFLAGS:
Wrapper extra LDFLAGS:
Wrapper extra LIBS: -ldl -lm -lnuma -Wl,--export-dynamic -lrt -lnsl
-lutil
Internal debug support: no
MPI interface warnings: no
MPI parameter check: runtime
Memory profiling support: no
Memory debugging support: no
libltdl support: yes
Heterogeneous support: no
mpirun default --prefix: yes
MPI I/O support: yes
MPI_WTIME support: gettimeofday
Symbol vis. support: yes
Host topology support: yes
MPI extensions: affinity example
FT Checkpoint support: no (checkpoint thread: no)
VampirTrace support: no
MPI_MAX_PROCESSOR_NAME: 256
MPI_MAX_ERROR_STRING: 256
MPI_MAX_OBJECT_NAME: 64
MPI_MAX_INFO_KEY: 36
MPI_MAX_INFO_VAL: 256
MPI_MAX_PORT_NAME: 1024
MPI_MAX_DATAREP_STRING: 128
/****************************************************************************
* mpifileout.c
* DESCRIPTION: Output using MPI IO functions
*
* This works correctly with NFS because NFS provides locking. It may
* not work correctly with PVFS ?
******************************************************************************/
#include "mpi.h"
#define array_size 100
static char filename[] = "output.dat";
main( int argc, char **argv )
{
int myrank, commsize;
MPI_File outfile;
MPI_Status status;
int nbytes, myarray[array_size], mode, i;
/* initialize MPI */
MPI_Init( &argc, &argv );
MPI_Comm_rank( MPI_COMM_WORLD, &myrank );
MPI_Comm_size( MPI_COMM_WORLD, &commsize );
/* initialize array */
for (i=0; i < array_size; i++) {
myarray[i] = 10*myrank*array_size+i;
}
/* open file */
mode = MPI_MODE_CREATE | MPI_MODE_WRONLY;
MPI_File_open( MPI_COMM_WORLD, filename, mode, MPI_INFO_NULL, &outfile );
/* set file view */
MPI_File_set_view( outfile, myrank*array_size*sizeof(MPI_INT), MPI_INT,
MPI_INT, "native", MPI_INFO_NULL );
/* write buffer to file */
MPI_File_write( outfile, &myarray[0], array_size, MPI_INT, &status );
/* print out number of bytes written */
MPI_Get_elements( &status, MPI_CHAR, &nbytes );
printf( "TASK %d ====== number of bytes written = %d ======\n", myrank,
nbytes );
/* close file */
MPI_File_close( &outfile );
/* finalize MPI */
MPI_Finalize();
}
