Hello!<div><br></div><div>I&#39;ve built openmpi 1.6.1rc3 with support of MXM. But when I try to launch an application using this mtl it hangs and can&#39;t figure out why.</div><div><br></div><div>If I launch it with np below 128 then everything works fine since mxm isn&#39;t used. I&#39;ve tried setting the threshold to 0 and launching 2 processes with the same result: hangs on startup.</div>
<div>What could be causing this problem?</div><div><br></div><div>Here is the command I execute:</div><div><div>/opt/openmpi/1.6.1/mxm-test/bin/mpirun \</div><div>                -np $NP \</div><div>                -hostfile hosts_fdr2 \</div>
<div>                --mca mtl mxm \</div><div>                --mca btl ^tcp \</div><div>                --mca mtl_mxm_np 0 \</div><div>                -x OMP_NUM_THREADS=$NT \</div><div>                -x LD_LIBRARY_PATH \</div>
<div>                --bind-to-core \</div><div>                -npernode 16 \</div><div>                --mca coll_fca_np 0 -mca coll_fca_enable 0 \</div><div>                ./IMB-MPI1 -npmin $NP Allreduce Reduce Barrier Bcast Allgather Allgatherv</div>
</div><div><br></div><div>I&#39;m performing the tests on nodes with Intel SB processors and FDR. Openmpi was configured with the following parameters:</div><div>CC=icc CXX=icpc F77=ifort FC=ifort ./configure --prefix=/opt/openmpi/1.6.1rc3/mxm-test --with-mxm=/opt/mellanox/mxm --with-fca=/opt/mellanox/fca --with-knem=/usr/share/knem</div>
<div>I&#39;m using the latest ofed from mellanox: 1.5.3-3.1.0 on centos 6.1 with default kernel: 2.6.32-131.0.15. </div><div>The compilation with default mxm (1.0.601) failed so I installed the latest version from mellanox: 1.1.1227</div>
<div><br></div><div>Best regards, Pavel Mezentsev.</div>