Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-17 Thread Jingchao Zhang
s on behalf of Novosielski, Ryan Sent: Thursday, December 17, 2015 7:04 PM To: Open MPI Users Subject: Re: [OMPI users] performance issue with OpenMPI 1.10.1 I'm no expert, but this one is pretty obvious. The error message says exactly what you should change: Equivalent MCA param

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-17 Thread Novosielski, Ryan
__ From: users [users-boun...@open-mpi.org] On Behalf Of Jingchao Zhang [zh...@unl.edu] Sent: Thursday, December 17, 2015 8:01 PM To: Open MPI Users Subject: Re: [OMPI users] performance issue with OpenMPI 1.10.1 The "mpirun --hetero-nodes -bind-to core -map-by core" resolves the perfo

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-17 Thread Ralph Castain
recated forms *will* disappear in a future version of Open MPI. > Please update to the new syntax. > -- > > Did I miss something in the "openmpi-mca-params.conf" file? > > Thanks, > > Dr. Jing

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-17 Thread Jingchao Zhang
of Nebraska-Lincoln 402-472-6400 From: users on behalf of Gilles Gouaillardet Sent: Wednesday, December 16, 2015 6:11 PM To: Open MPI Users Subject: Re: [OMPI users] performance issue with OpenMPI 1.10.1 binding is somehow involved in this, and i do not believe

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-16 Thread Gilles Gouaillardet
-6400 *From:* users on behalf of Ralph Castain *Sent:* Wednesday, December 16, 2015 1:52 PM *To:* Open MPI Users *Subject:* Re: [OMPI users] performance issue with OpenMPI 1.10.1 When I see such issues, I immediately start to think about binding patterns. How are

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-16 Thread Jingchao Zhang
llardet mailto:gil...@rist.or.jp>> Sent: Tuesday, December 15, 2015 12:11 AM To: Open MPI Users Subject: Re: [OMPI users] performance issue with OpenMPI 1.10.1 Hi, First, can you check how many MPI tasks and OpenMP threads are used with both ompi versions ? /* it should be 16 MPI tasks x n

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-16 Thread Ralph Castain
r > University of Nebraska-Lincoln > 402-472-6400 > > > From: users mailto:users-boun...@open-mpi.org>> > on behalf of Gilles Gouaillardet <mailto:gil...@rist.or.jp>> > Sent: Tuesday, December 15, 2015 12:11 AM > To: Open MPI Users > Subject: Re: [OMPI users] pe

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-16 Thread Jingchao Zhang
ers Subject: Re: [OMPI users] performance issue with OpenMPI 1.10.1 Hi, First, can you check how many MPI tasks and OpenMP threads are used with both ompi versions ? /* it should be 16 MPI tasks x no OpenMP threads */ can you also post both MPI task timing breakdown (from the output) i tried a s

Re: [OMPI users] performance issue with OpenMPI 1.10.1

2015-12-15 Thread Gilles Gouaillardet
Hi, First, can you check how many MPI tasks and OpenMP threads are used with both ompi versions ? /* it should be 16 MPI tasks x no OpenMP threads */ can you also post both MPI task timing breakdown (from the output) i tried a simple test with the VISCOSITY/in.wall.2d and i did not observe a

[OMPI users] performance issue with OpenMPI 1.10.1

2015-12-14 Thread Jingchao Zhang
Hi all, We installed the latest release of OpenMPI 1.10.1 on our Linux cluster and find it having some performance issues. We tested the OpenMPI performance against the MD simulation package LAMMPS (http://lammps.sandia.gov/). Compared to our previous installation of version 1.8.4, the 1.10.1