Q-Logic IB6054601-00 D Manuel D’Utilisation
3 – Using InfiniPath MPI
InfiniPath MPI Limitations
InfiniPath MPI Limitations
3-22
IB6054601-00 D
Q
No ports available on /dev/ipath
NOTE:
If port sharing is enabled, this limit is raised to 16 and 8 respectively. To
enable port sharing, set PSM_SHAREDPORTS=1 in your environment
enable port sharing, set PSM_SHAREDPORTS=1 in your environment
There are no C++ bindings to MPI -- use the extern C MPI function calls.
In MPI-IO file I/O calls in the Fortran binding, offset or displacement arguments are
limited to 32 bits. Thus, for example, the second argument of
limited to 32 bits. Thus, for example, the second argument of
MPI_File_seek
must
lie between -2
31
and 2
31
-1, and the argument to
MPI_File_read_at
must lie
between 0 and 2
32
-1.