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5–Using QLogic MPI

QLogic MPI Details

IB6054601-00 H 5-19

IPATH_UNIT This variable is for context sharing. When multiple

InfiniPath devices are present, this variable

restricts the use to a specific InfiniPath unit. By

default, all configured units are used in round

robin order.

Default: Unset

LD_LIBRARY_PATH This variable specifies the path to the run-time

library. It is often set in the .mpirunrc file.

Default: Unset

MPICH_CC This variable selects which compiler for mpicc,

and others, to use.

MPICH_CCC This variable selects which compiler for mpicxx,

and others, to use.

MPICH_F90 This variable selects which compiler for mpif90,

and others, to use.

MPIHOSTS This variable sets the name of the machines

(mpihosts) file.

Default: Unset

MPI_NPROCS This variable specifies the number of MPI pro-

cesses to spawn.

Default: Unset

MPI_SHELL Specifies the name of the program to log into

remote hosts.

Default: ssh unless MPI_SHELL is defined.

PSM_DEVICES Non-QLogic MPI users can set this variable to

enable running in shared memory mode on a sin-

gle node. This variable is automatically set for

QLogic MPI.

Default: PSM_DEVICES="self,ipath"

PSC_MPIRUN_DEFAULTS_PATH This variable sets the path to a user-local mpirun

defaults file.

Default:

/opt/infinipath/etc/mpirun.defaults

PSM_SHAREDCONTEXTS This variable overrides automatic context sharing

behavior. YES is equivalent to 1 (see Default).

Default: PSM_SHAREDCONTEXTS=1

Table 5-7. Environment Variables (Continued)

Name Description

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 203 204

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Qlogic OFED+ Host Spécifications Page 87