Moving wall simulations with MPI_Allreduce error.


Hi.
I haven’t got time to fully check it out, but a 2 processor run of 1Feb14 revealed that it was stuck in two different MPI_Allreduce calls:

group.cpp line 844 (the xcm routine)
dump write (line 302)

It look like both went into verlet->modify (line 144 of verlet.cpp) and one came out whilst the other got stuck in xcm.

Hope that helps,
Duncan


From: Axel Kohlmeyer [email protected] - 2014-04-06 08:15:56

|

  Hi.
I haven't got time to fully check it out, but a 2 processor run of 1Feb14
revealed that it was stuck in two different MPI_Allreduce calls:

group.cpp line 844 (the xcm routine)
dump write (line 302)

It look like both went into verlet->modify (line 144 of verlet.cpp) and
one came out whilst the other got stuck in xcm.

thanks for the effort. i think at this moment, we first need to have an
input deck that works properly on a single processor and this doesn't look
like it. if there are all kinds of bad things happening to atoms, then it
is difficult to tell, whether there is a hiccup in LAMMPS or just bad
system dynamics.

axel.