[OMPI users] IB latency on Mellanox ConnectX hardware

Several users have noticed poor latency with Open MPI when using the new Mellanox ConnectX HCA hardware. Open MPI was getting about 1.9us latency with 0 byte ping-pong benchmarks (e.g., NetPIPE or osu_latency). This has been fixed in OMPI v1.2.4. Short version: -- Open MPI v1

Re: [OMPI users] OpenMPI + SGE Problem

Dear Reuti and Harvey, I just tried by setting control_slaves to TRUE and it works! Thank you very much, Vittorio On Oct 17, 2007, at 7:48 PM, Reuti wrote: Hi, Am 17.10.2007 um 18:49 schrieb Vittorio Zaccaria: I am just trying to run a very simple application using mpirun in an SGE 6 e

Re: [OMPI users] MPI_Probe succeeds, but subsequent MPI_Recv gets stuck

Can you send a short test program that shows this problem, perchance? On Oct 3, 2007, at 1:41 PM, Daniel Rozenbaum wrote: Hi again, I'm trying to debug the problem I posted on several times recently; I thought I'd try asking a more focused question: I have the following sequence in the cl

Re: [OMPI users] OMPI not work with Intel '-fast' option

This looks like a compiler issue, to me. It is probably worth asking your Intel compiler support people as to why this happens. I tried with both icc 9.1 and 10.0 and am able to replicate your findings: it works fine without -fast, but claims that it can't find mpi_f90 when you use -fast:

Re: [OMPI users] Compiling OpenMPI for i386 on a x86_64

On Oct 17, 2007, at 12:35 PM, Jim Kusznir wrote: checking if Fortran 90 compiler supports LOGICAL... yes checking size of Fortran 90 LOGICAL... ./configure: line 34070: 7262 Segmentation fault ./conftest 1>&5 2>&1 configure: error: Could not determine size of LOGICAL Awesome! It looks l

Re: [OMPI users] OpenMPI + SGE Problem

Hi, Am 17.10.2007 um 18:49 schrieb Vittorio Zaccaria: I am just trying to run a very simple application using mpirun in an SGE 6 environment. The job is called 'example' and it is submitted to the SGE environment with the following command: > qsub -pe parallel 2 example where 'parallel'

[OMPI users] OpenMPI + SGE Problem

Hello, I am just trying to run a very simple application using mpirun in an SGE 6 environment. The job is called 'example' and it is submitted to the SGE environment with the following command: > qsub -pe parallel 2 example where 'parallel' is a working parallel environment. 'example' is

[OMPI users] Compiling OpenMPI for i386 on a x86_64

Hello: I'm trying to rebuild the CentOS OpenMPI rpm (to add torque support) on my x86_64 cluster. I was able to build 64-bit binaries fine, but CentOS wants the 32-bit libs and -devel portions installed as well for full compatability. In this area, I'm running into trouble. When I try and build

Re: [OMPI users] Open MPI can't open PML cm

The CM PML only support networks that do matching in hardware. In Open MPI temrs, the CM PML require one of the MTL (instead of the BTL for all others PML). For a full list of supported networks, one can list the content of the ompi/mca/mtl directory (right now: Myrinet, Portals and QSLogic

[OMPI users] Open MPI can't open PML cm

Hi, I am trying to use the cm component from pml, but when I execute the command: "mpirun -np 2 --mca pml cm ompi_test", I get the error message that "No available pml components were found". I did a ompi_info to see if the cm component exist, and it does. The output of ">ompi_info | grep cm"

[OMPI users] OMPI not work with Intel '-fast' option

Hi all, I'm using OpenMPI 1.2.2 with Intel compilers (icc, ifort) But I found mpicc and mpif90 cannot work with Intel -fast optimisation. [ywan@frontend01 hello]$ mpif90 -fast -o hello -i-dynamic hello.f90 IPO: performing