A recent exchange on the Open MPI users’ list turned up a minor bug in our code base. The bug had to do with how Open MPI reported a settings value through our configuration querying tool (“ompi_info”).
The code using the configuration value in question was doing the Right Things, but the tool was effectively reporting the wrong value. This led to some confusion on the mailing list, resulting in a bug fix being pushed upstream and the user concluding, “Trust, but verify.”
Very true!
Tags: HPC, middleware, mpi