diff --git a/README-mpi-hints.md b/README-mpi-hints.md index dd21fa387057c6a6032a96146c4b2b0105cbe10a..b55d27390e1029e3f5262a5e5e5117f8cc0a0640 100644 --- a/README-mpi-hints.md +++ b/README-mpi-hints.md @@ -48,3 +48,13 @@ UCX_TLS=ud_x,shm,self UCX_RC_MLX5_TM_ENABLE=n UCX_DC_MLX5_TM_ENABLE=n ``` + +These environment variables (set on the Mellanox-base cosma system in Durham) +for version 4.0.5 with the UCX backend can also be useful: + +``` +OMPI_MCA_btl ^openib +OMPI_MCA_btl_openib_flags 1 +OMPI_MCA_plm_rsh_num_concurrent 768 +OMPI_MCA_mpool_rdma_rcache_size_limit 209715200 +``` \ No newline at end of file