QLogic OFED+ Host Software User Guide, Rev. B

4–Running QLogic MPI on QLogic Adapters
QLogic MPI Details
The .mpirunrc command line cannot contain any interactive commands. It can
contain commands that output on stdout or stderr.
There is a global options file for mpirun arguments. The default location of this
file is:
/opt/infinipath/etc/mpirun.defaults
You can use an alternate file by setting the environment variable
$PSC_MPIRUN_DEFAULTS_PATH. See the mpirun man page for more
information.
Environment Variables
Table 4-7 contains a summary of the environment variables that are used by
TrueScale and mpirun.
Table 4-7. Environment Variables
Name
Description
MPICH_ROOT
This variable is used by mpirun to find the
mpirun-ipath-ssh executable, set up
LD_LIBRARY_PATH, and set up a prefix for all
InfiniPath pathnames. This variable is used by the
--prefix argument (or is the same as --prefix),
if installing TrueScale RPMs in an alternate
location.
Default: Unset
IPATH_PORT Specifies the port to use for the job, 1 or 2.
Specifying 0 will autoselect IPATH_PORT.
Default: Unset
IPATH_SL
IPATH_UNIT
LD_LIBRARY_PATH
Service Level for QDR Adapters, these are used
to work with the switch's Vfabric feature.
Default: Unset
This variable is for context sharing. When multiple
TrueScale devices are present, this variable
restricts the use to a specific TrueScale unit. By
default, all configured units are used in round
robin order.
Default: Unset
This variable specifies the path to the run-time
library. It is often set in the .mpirunrc file.
Default: Unset
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