From: Ethan Mallove (ethan.mallove_at_[hidden])
Date: 2007-06-21 11:29:02
Hi,
I have a way to toggle single-node testing at the command
line. E.g., it looks like this:
$ client/mtt run_on_single_node=1 ...
$ client/mtt run_on_single_node=0 ...
I just needed the below INI mojo to get this going.
Added a "run_on_single_node" boolean to my [MTT] section.
("ompinfo" is an internal Sun script that spits out
hard-coded hostlist's based on what node the user is on.)
{{{
[MTT]
...
# Boolean which tells MTT to run on a single node
run_on_single_node = 0
ompinfo = /ws/ompi-tools/bin/ompinfo
hostlist = <<EOT
&perl("
if ($run_on_single_node) {
return `$ompinfo -j' ' | cut -f1 -d' '`;
} else {
return `$ompinfo -j' '`;
}
")
EOT
}}}
And then I have this in my [MPI Details] section:
{{{
[MPI Details: Open MPI]
...
# Figure out which btl's to use
btls = <<EOT
&perl("
# Return cached btls var, if we have it
if (defined(\@btls)) {
return \\\@btls;
}
# What hosts is MTT currently running on?
my \@hosts = split /\s+|,/, hostlist_hosts();
# If there is only one host, use SM
if (scalar(\@hosts) < 2) {
push(\@btls, 'self,sm');
# Otherwise, use uDAPL or TCP
} else {
if ($ib_is_up) {
push(\@btls, 'self,udapl');
} else {
push(\@btls, 'self,tcp');
}
}
return \\\@btls;
")
EOT
}}}
Is there an easier way to do this?
-Ethan