HP XC System 2.x Software - Manual (Page 119)

8.8 The mpirun Command Options
HP-MPI on the HP XC system provides the following additional mpirun command line
options:
-srun The -srun option is required in mpirun command in the HP XC environment.
The preferred method for startup for HP XC is:
mpirun mpirun options -srun srun options
Starting up directly from srun is not supported. In this context, mpirun sets
a few environment variables and invokes /opt/hptc/bin/srun . Any
arguments on the mpirun command line that follow -srun are passed down to
the srun command.
-subnet This release supports the -subnet option that allows you to select which
default system interconnect should be used for communication for TCP/IP. The
system interconnect is chosen by using the subnet associated with the hostname
or IP address specified with the
-subnet option.
mpirun -subnet hostname-or-IP-address
The hostname-or-IP-address operand is a hostname or IP address that
resolves to a real IP address.
-elan ,
-ELAN ,
-gm , -GM ,
-itapi ,
-ITAPI
These options are provided for explicit command line system interconnect
selection. The lower case option is taken as advisory and means use the system
interconnect if it is available. The upper case option is taken as mandatory and
instructs MPI to abort if the system interconnect is unavailable. The interaction
between these options and the related
MPI_IC_ORDER variable is that any
command line system interconnect selection here is implicitly prepended to
MPI_IC_ORDER .
-TCP If both Quadrics and Gigabit Ethernet are installed, Elan4 is the default. In order
to use Gigabit Ethernet, add
-TCP and verify that hostname -ip returns the
subnet of the Gigabit Ethernet private network. For example:
$ mpirun -TCP -srun -N8 ./a.out
-dd Use deferred deregistration when registering and deregistering memory for
RDMA message transfers. The default is to use deferred deregistration.
However, using this option also produces a statistical summary of the deferred
deregistration activity when
MPI_Finalize is called. The option is ignored if
the underlying system interconnect does not use and RDMA transfer mechanism,
or if the deferred deregistration is managed directly by the system interconnect
library.
-ndd Do not use deferred deregistration when registering memory for RDMA message
transfers. To enable deferred deregistration, the HP-MPI library must intercept
calls allocated by
libc memory allocation routines. In the rare case that these
changes are incompatible with a particular application, this option can be used to
disallow the use of deferred deregistration.
-T This option prints user and system times for each MPI rank.
-prot This option prints the communication protocol between each host (for example,
TCP/IP, Elan, or shared memory).
Using HP-MPI 8-9