Re: [OMPI users] Bug in Fortran-module MPI of OpenMPI 1.10.0 with Intel-Ftn-compiler

Hi Jeff I believe you misunderstood my comment. My point was that everyone optimizes their distributions according to different rules based on a variety of factors. Intel MPI targets a specific market segment that allows them to set all those nice little parameters such as eager limit to someth

Re: [OMPI users] Bug in Fortran-module MPI of OpenMPI 1.10.0 with Intel-Ftn-compiler

Ralph: Intel MPI supports a wide range of conduits in the same library ( https://software.intel.com/sites/default/files/Reference_Manual_1.pdf, section 3.3.1), which can be selected at runtime, so I don't understand your specialization argument. Are you suggesting that a lack of CPU-specific opti

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

"김건홍(KIM GEON HONG)" writes: > Another interesting symptom is that, > if I run two mpirun’s with –np 2 option on a same node, those two > mpirun’s run on the same cpu’s. I thought OMPI avoided doing that, but anyway you really should use a resource manager to control the allocation. (I mean mana

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

"김건홍(KIM GEON HONG)" writes: > Hello, > > I tried to run a parallel computation (OpenFOAM) using Open MPI on a > HPC connected with infiniband. > When I ran a job using mpirun over a couple of nodes (20 cpus per > node), the computation was not accelerated as I expected. The usual problem with Op

Re: [OMPI users] help understand unhelpful ORTE error message

Gilles Gouaillardet writes: > Currently, ompi create a file in the temporary directory and then mmap it. > an obvious requirement is the temporary directory must have enough free > space for that file. > (this might be an issue on some disk less nodes) > > > a simple alternative could be to try /

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

Not by default. It can be done with a rankfile, but the observed behavior is normal when launching two mpirun with the same machinefile and all default options. Aurélien -- Aurélien Bouteiller, Ph.D. ~~ https://icl.cs.utk.edu/~bouteill/ > Le 24 nov. 2015 à

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

are two mpirun supposed to talk to each other in order to avoid binding to the same cpu/socket/... twice ? On 11/24/2015 4:46 PM, Aurélien Bouteiller wrote: You can use the 'mpirun -report-bindings’ option to see how your processes have been mapped in your deployment. If you are unhappy with

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

You can use the 'mpirun -report-bindings’ option to see how your processes have been mapped in your deployment. If you are unhappy with the default, you can play with the -map-by option. Aurélien -- Aurélien Bouteiller, Ph.D. ~~ https://icl.cs.utk.edu/~bouteill/

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

I use Open MPI 1.8.5. The command is as following: $ mpirun –np 40 –hostfile machines simpleFoam –parallel and the host file “machines” says, hpcnode127 cpu=20 hpcnode128 cpu=20 Another interesting symptom is that, if I run two mpirun’s with –np 2 option on a same node, those two mpirun’s run on

Re: [OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

Could you please tell us what version of OpenMPI you are using, and the cmd line you used to execute the job? Thanks Ralph > On Nov 23, 2015, at 11:05 PM, 김건홍(KIM GEON HONG) > wrote: > > Hello, > > I tried to run a parallel computation (OpenFOAM) using Open MPI on a HPC > connected with in

[OMPI users] OpenMPI with infiniband, child processes of mpirun are missing or overlapped on the same cpu

Hello, I tried to run a parallel computation (OpenFOAM) using Open MPI on a HPC connected with infiniband. When I ran a job using mpirun over a couple of nodes (20 cpus per node), the computation was not accelerated as I expected. For example, I ran the job over 40 cpus on 2 nodes, and I checke