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February 22, 2021, 03:03 |
Open MPI warning
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#1 |
New Member
Guillaume Beardsell
Join Date: Aug 2012
Posts: 19
Rep Power: 13 |
Hi,
I am getting this warning in run.log when I start a simulation: A high-performance Open MPI point-to-point messaging module was unable to find any relevant network interfaces: Module: OpenFabrics (openib) Host: ip-10-0-0-42 Another transport will be used instead, although this may result in lower performance. NOTE: You can disable this warning by setting the MCA parameter btl_base_warn_component_unused to 0. Should I worry about it? Will this slow down my calculations as implied? I am running my simulations on AWS EC2 instances (one instance, multiple processors). Thanks! Guillaume |
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February 22, 2021, 12:19 |
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#2 |
Senior Member
Kislaya Srivastava
Join Date: Sep 2017
Location: Convergent Science, Northville MI
Posts: 165
Rep Power: 8 |
Hello Guillaume,
This warning can be safely ignored. It's just saying it is unable to find any InfiniBand interconnect hardware. CONVERGE 3.0 works best with a high-performance interconnect such as InfiniBand or Omni-Path. But this is expected on an AWS server, and not relevant for a single-node simulation in any case. Sincerely, |
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