mpiCheckPhaseHook: use low-level env HWLOC_XMLFILE in all MPI implementations (#399205)

Author: markuskowa

pkgs/by-name/mp/mpiCheckPhaseHook/mpi-check-hook.sh

@@ -55,7 +55,7 @@ setupMpiCheck() {
       # The solution is to use a preset cpu topology file and disable ucx model.
 
       # Disable sysfs cpu topology directory discovery.
-      export PRTE_MCA_hwloc_use_topo_file="@topology@"
+      export HWLOC_XMLFILE="@topology@"
       # Use the network model ob1 instead of ucx.
       export OMPI_MCA_pml=ob1
       ;;
@@ -68,6 +68,8 @@ setupMpiCheck() {
     MVAPICH)
       # Disable CPU pinning
       export MV2_ENABLE_AFFINITY=0
+      # Disable sysfs cpu topology directory discovery.
+      export HWLOC_XMLFILE="@topology@"
       ;;
   esac