HPC/Applications/impi: Difference between revisions

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=== Work-in-progress: Evaluation if both modules can be loaded by default ===
=== Work-in-progress: Evaluation if both modules can be loaded by default ===
* Probably not possible in general, because the following scripts and dynamic libraries overlap:
* Probably not possible in general, because the following scripts and dynamic libraries overlap:
(cd $OMPI_HOME; ls -1 {bin,lib}/* ) > /tmp/ompi
(cd $IMPI_HOME; ls -1 {bin,lib}/* ) > /tmp/impi
comm -1 -2 /tmp/?mpi
rm /tmp/?mpi
  bin/mpicc
  bin/mpicc
  bin/mpicxx
  bin/mpicxx
Line 38: Line 43:
  bin/mpirun
  bin/mpirun
  '''lib/libmpi.so'''
  '''lib/libmpi.so'''
* Comparison of the names for binaries and scripts:
ls -1 $OMPI_HOME/bin/ > /tmp/ompi
ls -1 $IMPI_HOME/bin/ > /tmp/impi
comm /tmp/?mpi | sort
<pre>
IMPI only
|      OMPI only
|      |      Both
|      |      |
mpicc
mpicxx
mpiexec
mpif77
mpif90
mpirun
mpiCC
mpiCC-vt
mpic++
mpic++-vt
mpicc-vt
mpicxx-vt
mpif77-vt
mpif90-vt
ompi-clean
ompi-iof
ompi-ps
ompi-server
ompi_info
opal_wrapper
opari
orte-clean
orte-iof
orte-ps
orted
orterun
otfaux
otfcompress
otfconfig
otfdecompress
otfdump
otfinfo
otfmerge
vtcc
vtcxx
vtf77
vtf90
vtfilter
vtunify
IMB-MPI1
compchk.sh
cpuinfo
mpd
mpd.py
mpdallexit
mpdallexit.py
mpdboot
mpdboot.py
mpdcheck
mpdcheck.py
mpdchkpyver.py
mpdcleanup
mpdcleanup.py
mpdexit
mpdexit.py
mpdgdbdrv.py
mpdhelp
mpdhelp.py
mpdkilljob
mpdkilljob.py
mpdlib.py
mpdlistjobs
mpdlistjobs.py
mpdman.py
mpdringtest
mpdringtest.py
mpdroot
mpdrun
mpdrun.py
mpdsigjob
mpdsigjob.py
mpdtrace
mpdtrace.py
mpiexec.hydra
mpiexec.py
mpifc
mpigcc
mpigxx
mpiicc
mpiicpc
mpiifort
mpitune
mpivars.csh
mpivars.sh
mtv.so
pmi_proxy
ptp_impi_proxy.py
tune
</pre>
* Same for libraries:
ls -1 $OMPI_HOME/lib/ > /tmp/ompi
ls -1 $IMPI_HOME/lib/ > /tmp/impi
comm /tmp/?mpi | sort
<pre>
libmpi.so
libmca_common_sm.la
libmca_common_sm.so
libmca_common_sm.so.1
libmca_common_sm.so.1.0.0
libmpi.la
libmpi.so.0
libmpi.so.0.0.2
libmpi_cxx.la
libmpi_cxx.so
libmpi_cxx.so.0
libmpi_cxx.so.0.0.1
libmpi_f77.la
libmpi_f77.so
libmpi_f77.so.0
libmpi_f77.so.0.0.1
libmpi_f90.la
libmpi_f90.so
libmpi_f90.so.0
libmpi_f90.so.0.0.1
libopen-pal.la
libopen-pal.so
libopen-pal.so.0
libopen-pal.so.0.0.0
libopen-rte.la
libopen-rte.so
libopen-rte.so.0
libopen-rte.so.0.0.0
libopenmpi_malloc.la
libopenmpi_malloc.so
libopenmpi_malloc.so.0
libopenmpi_malloc.so.0.0.0
libotf.a
libotf.la
libvt.a
libvt.fmpi.a
libvt.mpi.a
libvt.omp.a
libvt.ompi.a
mpi.mod
openmpi
libmpi.a
libmpi.so.3.1
libmpi.so.3.2
libmpi.so.4
libmpi.so.4.0
libmpi_dbg.a
libmpi_dbg.so
libmpi_dbg.so.3.1
libmpi_dbg.so.3.2
libmpi_dbg.so.4
libmpi_dbg.so.4.0
libmpi_dbg_mt.a
libmpi_dbg_mt.so
libmpi_dbg_mt.so.3.1
libmpi_dbg_mt.so.3.2
libmpi_dbg_mt.so.4
libmpi_dbg_mt.so.4.0
libmpi_ilp64.a
libmpi_ilp64.so
libmpi_ilp64.so.4
libmpi_ilp64.so.4.0
libmpi_log.a
libmpi_log.so
libmpi_log.so.3.1
libmpi_log.so.3.2
libmpi_log.so.4
libmpi_log.so.4.0
libmpi_log_mt.a
libmpi_log_mt.so
libmpi_log_mt.so.3.1
libmpi_log_mt.so.3.2
libmpi_log_mt.so.4
libmpi_log_mt.so.4.0
libmpi_lustre.so
libmpi_lustre.so.4.0
libmpi_mt.a
libmpi_mt.so
libmpi_mt.so.3.1
libmpi_mt.so.3.2
libmpi_mt.so.4
libmpi_mt.so.4.0
libmpi_panfs.so
libmpi_panfs.so.4.0
libmpi_pvfs2.so
libmpi_pvfs2.so.4.0
libmpich.so
libmpich.so.1
libmpich.so.1.1
libmpichcxx.so
libmpichcxx.so.1
libmpichcxx.so.1.1
libmpigc3.a
libmpigc3.so
libmpigc3.so.3.1
libmpigc3.so.3.2
libmpigc3.so.4
libmpigc3.so.4.0
libmpigc4.a
libmpigc4.so
libmpigc4.so.3.1
libmpigc4.so.3.2
libmpigc4.so.4
libmpigc4.so.4.0
libmpigf.a
libmpigf.so
libmpigf.so.3.1
libmpigf.so.3.2
libmpigf.so.4
libmpigf.so.4.0
libmpigi.a
libmpiic.a
libmpiic.so
libmpiic.so.3.1
libmpiic.so.3.2
libmpiic4.a
libmpiic4.so
libmpiic4.so.3.1
libmpiic4.so.3.2
libmpiif.a
libmpiif.so
libmpiif.so.3.1
libmpiif.so.3.2
libtvmpi.so
libtvmpi.so.3.1
libtvmpi.so.3.2
libtvmpi.so.4
libtvmpi.so.4.0
</pre>

Revision as of 21:43, June 3, 2011

Introduction

Intel-MPI is based on MPICH2 and provides an MPICH2 runtime environment for precompiled binaries.

See also

Process manager

Use the Hydra process manager (new since impi version 4.x). See sec. 2.4 Scalable Process Management System in the Reference Manual. To do so, simply use mpiexec.hydra instead of the customary mpirun or mpiexec calls:

 mpiexec.hydra \
	-machinefile  $PBS_NODEFILE \
	-np $(wc -l < $PBS_NODEFILE) \
	./a.out

With Hydra, you no longer need to set up and tear down the older and considerably less stable MPD manager.

IMPI vs. OpenMPI

The openmpi and impi modules can coexist at runtime if:

  • impi is loaded first and is called using mpiexec.hydra.
  • openmpi is loaded second and is called using mpirun.
  • binaries using impi are statically linked, i.e.,
ldd binary-using-impi | grep libmpi.so || echo OK
prints "OK".
  • you don't attempt to compile software using the convenience wrappers like mpicc, mpif90, etc. For these wrappers, the last module loaded will be active. It may be possible to use full paths like $IMPI_HOME/bin/mpif90, but this has not been tested fully.
Since openmpi is loaded by default, use the following sequence in ~/.bashrc:
module unload openmpi
module load impi
module load openmpi
Caveat
This replaces possibly specific existing openmpi versions by the default version, which may break packages depending on it.

Work-in-progress: Evaluation if both modules can be loaded by default

  • Probably not possible in general, because the following scripts and dynamic libraries overlap:
(cd $OMPI_HOME; ls -1 {bin,lib}/* ) > /tmp/ompi
(cd $IMPI_HOME; ls -1 {bin,lib}/* ) > /tmp/impi
comm -1 -2 /tmp/?mpi
rm /tmp/?mpi
bin/mpicc
bin/mpicxx
bin/mpiexec
bin/mpif77
bin/mpif90
bin/mpirun
lib/libmpi.so