Hi all, I've built OpenMPI 4.3.0 with GCC 9.3.0 but on the server ucx was not available when I set --with-ucx. I remove this option and it compiles fine without ucx. However I have a strange behavior as when using mpirun I must explicitely remove ucx to avoid an error: in my module file I have to set
setenv OMPI_MCA_pml ^ucx setenv OMPI_MCA_btl_openib_allow_ib 1 Is this the normal behavior or a small bug when ucx is not used ? I saw a discussion about this but it was before OpenMPI 4.2.0 release. Patrick >From ompi_info: Configure command line: '--with-lustre' '--with-slurm' '--with-hwloc' '--enable-mpirun-prefix-by-default' '--prefix=/......../GCC9.3/openmpi/4.0.3' '--with-pmi' '--enable-mpi1-compatibility' .... MCA btl: openib (MCA v2.1.0, API v3.1.0, Component v4.0.3) MCA btl: tcp (MCA v2.1.0, API v3.1.0, Component v4.0.3) MCA btl: vader (MCA v2.1.0, API v3.1.0, Component v4.0.3) MCA btl: self (MCA v2.1.0, API v3.1.0, Component v4.0.3)
