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Commit f30518dd authored by Moe Jette's avatar Moe Jette
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expand explanation of PMI_FANOUT_OFF_HOST env var.

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doc/man/man1/srun.1
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...@@ -1144,8 +1144,10 @@ per host and one task on that host forwards the data to other ...@@ -1144,8 +1144,10 @@ per host and one task on that host forwards the data to other
tasks on that host up to \fBPMI_FANOUT\fR. tasks on that host up to \fBPMI_FANOUT\fR.
If \fBPMI_FANOUT_OFF_HOST\fR is defined, the user task If \fBPMI_FANOUT_OFF_HOST\fR is defined, the user task
may be required to forward the data to tasks on other hosts. may be required to forward the data to tasks on other hosts.
Setting \fBPMI_FANOUT_OFF_HOST\fR may increase performance Setting \fBPMI_FANOUT_OFF_HOST\fR may increase performance.
and vulnerability to failures. Since more work is performed by the PMI library loaded by
the user application, failures also can be more common and
more difficult to diagnose.
.TP .TP
\fBPMI_TIME\fR \fBPMI_TIME\fR
This is used exclusively with PMI (MPICH2 and MVAPICH2) and This is used exclusively with PMI (MPICH2 and MVAPICH2) and
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