Ben,
This is a bug that will be fixed in 4.0.1 (it is already fixed in the
v4.0.x branch)
meanwhile, you can add
rmaps_base_mapping_policy=numa:OVERSUBSCRIBE
in your openmpi-mca-params.conf.
Note the default policy is to bind to NUMA domain if there are more than
two MPI tasks, and bind to core otherwise,
so this option is not strictly equivalent to --oversubscribe.
Cheers,
Gilles
On 1/26/2019 2:47 AM, Benjamin Brock wrote:
I used to be able to (e.g. in Open MPI 3.1) put the line
rmaps_base_oversubscribe = true
in my `openmpi-mca-params.conf`, and this would enable
oversubscription by default. In 4.0.0, it appears that this option
doesn't work anymore, and I have to use `--oversubscribe`.
Am I missing something, or has the parameter name changed?
Ben
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