Re: MPI debugging workflows
On 28/08/2018 22:20, Drew Parsons wrote:
On 2018-08-03 22:46, Dima Kogan wrote:
2. Is the MPI implementation significant? Would mpich behave potentially
differently here from openmpi?
For what it's worth, 2 separate upstreams (PETSc and FEniCS) both hold
a dim view of openmpi, perceiving it full of bugs, which has certainly
been the case so far with openmpi3. They recommend mpich.
We've already discussed transitioning mpi-defaults over from openmpi
to mpich in the past. Now that openmpi3 is more or less settled in
testing, is it time to open that discussion again?
I'm in favour of moving default to mpich. OpenMPI is now at 3.1.2 and I
plan to ship 3.1.x in Buster.
Its also worth testing MPICH 3.3b3. Currently mpich is at 3.3b2 and
3.3b3 is in experimental for the last few months. I've left off updating
mpich until openmpi is stable (nearly tere I hope)
Alastair
Drew
--
Alastair McKinstry, <alastair@sceal.ie>, <mckinstry@debian.org>, https://diaspora.sceal.ie/u/amckinstry
Misentropy: doubting that the Universe is becoming more disordered.
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