Re: MPI debugging workflows
Answering some of my own questions inline...
Dima Kogan <dima@secretsauce.net> writes:
> 2. Is the MPI implementation significant? Would mpich behave
> potentially differently here from openmpi?
I rebuilt sundials with mpich instead of openmpi, and those tests now
work just fine: nothing locks up. There might be other issues involved
here, but I'd like to fully figure out what's going on before proposing
any such change.
I also poked around with a debugger a little bit: the lockup is inside
some MPI calls. Anybody have experience here? I can imagine this is an
openmpi bug, but the last time I touched MPI anything was about 20 years
ago, so any info from more-recently-experienced people would be welcome.
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