October 16, 2014 11:40 AM
To: Open MPI Users
Subject: Re: [OMPI users] Hybrid OpenMPI/OpenMP leading to deadlocks?
Hi Kevin
Wouldn't it be possible to make your code restartable, by saving the
appropriate fluid configuration/phase space variables, and splitting your long
run into smaller pieces?
That
function than what I have coded?
*From:*users [mailto:users-boun...@open-mpi.org] *On Behalf Of *Ralph
Castain
*Sent:* Wednesday, October 15, 2014 11:05 PM
*To:* Open MPI Users
*Subject:* Re: [OMPI users] Hybrid OpenMPI/OpenMP leading to deadlocks?
If you only have one thread doing MPI calls
function than what I have coded?
From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Ralph Castain
Sent: Wednesday, October 15, 2014 11:05 PM
To: Open MPI Users
Subject: Re: [OMPI users] Hybrid OpenMPI/OpenMP leading to deadlocks?
If you only have one thread doing MPI calls, then single
If you only have one thread doing MPI calls, then single and funneled are
indeed the same. If this is only happening after long run times, I'd suspect
resource exhaustion. You might check your memory footprint to see if you are
running into leak issues (could be in our library as well as your
I am using OpenMPI 1.8.3 on a linux cluster to run fairly long CFD
(computational fluid dynamics) simulations using 16 MPI processes. The
calculations last several days and typically involve millions of MPI exchanges.
I use the Intel Fortran compiler, and when I compile with the -openmp option
