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Subject: Re: [OMPI users] Questions on MPI I/O and ompi_info
From: Ralph Castain (rhc_at_[hidden])
Date: 2014-02-13 19:30:59


Hmmm...well, a little digging says that we probably didn't do this as thoroughly as we should have :-/

Basically, the "MPI I/O Support" line is tied solely to the disable-mpi-io flag. In the 1.6 series, you only had one option for MPI I/O support, and that was romio. So if you disable romio, then you'll get a "failed" reply to those APIs.

What we should have done is automatically "disable-mpi-io" if no components were built - i.e., if you disable them all from building. In 1.7, that would mean disabling both romio and ompi-io. In 1.6, that would just mean disabling romio.

I'll pass it along to Jeff to see if it can be done - we can certainly change the flag, but maybe not for the 1.6 series

On Feb 13, 2014, at 12:01 PM, Blosch, Edwin L <edwin.l.blosch_at_[hidden]> wrote:

> 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
>
>
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