HP-MPI Version 2.2.7 for Linux Release Note

• The HP-MPI Version 2.2.7 library for Linux contains a dependency which requires

libpthread. The mpicc, mpif90, etc. compiler wrapper scripts automatically add the

necessary -lpthread, but manually linked applications must explicitly add -lpthread.

• Profiling routines built for C calls will not cause the corresponding Fortran calls to be

wrapped automatically. To profile Fortran routines, separate wrappers need to be written

for the Fortran calls.

• HP-MPI complies with the MPI-1.2 standard, which defines bindings for Fortran 77 and C,

but not Fortran 90 or C++. HP-MPI also complies with the C++ binding definitions detailed

in the MPI-2 standard. However, the C++ bindings provided are not thread safe and should

not be used with the HP-MPI threaded libraries (for example, libmtmpi). HP-MPI does not

provide bindings for Fortran 90. Some features of Fortran 90 might interact with MPI

non-blocking semantics to produce unexpected results. Consult the HP-MPI User’s Guide

for details.

• When using the HP Caliper profiling tool with HP-MPI applications, it might be necessary

to specify the following environment variable setting in order to avoid an application abort.

% setenv HPMPI_NOPROPAGATE_SUSP 1

$ export HPMPI_NOPROPAGATE_SUSP=1

• To use the -tv option to mpirun, the TotalView binary must be in the user’s PATH, or the

TOTALVIEW environment variable must be set to the full path of the TotalView binary.

% export TOTALVIEW=/usr/toolworks/totalview/bin/totalview

• Extended collectives with intercommunicators are not profiled by the HP-MPI lightweight

instrumentation mode.

• High Availability (-ha) mode and the diagnostic library are not allowed at the same time.

• MPICH mode and the diagnostic library are not allowed at the same time.

• The diagnostic library strict mode is not compatible with some MPI-2 features.

• Some versions of Quadrics have a memory leak. The error received will look like:

0 MAP_SDRAM(140008800): can't map SDRAM 2824000(2404000) -

4020000(3c00000) (25149440 bytes) : -1

ELAN_EXCEPTION @ 0: 5 (Memory exhausted)

newRxDesc: Elan memory exhausted: port 2b200

This error can occur in following two cases:

— If the application calls MPI_Cancel repeatedly.

— If the application receives on MPI_ANY_SOURCE.

Set the environment variable LIBELAN_TPORT_BIGMSG to an appropriate message size to

resolve the resource issue. If this setting does not eliminate the error, contact Quadrics for

the fix.

22 Known Problems and Workarounds