Limit gfswavepostpnt to 40 PEs/node (NOAA-EMC#2588)

This fixes the slow runtime of the gfswavepostpnt job on Hercules. The
job is very I/O intensive and does not scale well to large nodes, so
limit the number of jobs/node to 40.

Resolves NOAA-EMC#2587

parm/config/gefs/config.resources

@@ -252,31 +252,45 @@ case ${step} in
     export memory_wavepostsbs="10GB"
     ;;
 
+  # The wavepost*pnt* jobs are I/O heavy and do not scale well to large nodes.
+  # Limit the number of tasks/node to 40.
   "wavepostbndpnt")
     export wtime_wavepostbndpnt="01:00:00"
     export npe_wavepostbndpnt=240
     export nth_wavepostbndpnt=1
     export npe_node_wavepostbndpnt=$(( npe_node_max / nth_wavepostbndpnt ))
-    export NTASKS=${npe_wavepostbndpnt}
     export is_exclusive=True
+    if [[ ${npe_node_wavepostbndpnt} -gt 40 ]]; then
+        export npe_node_wavepostbndpnt=40
+        export is_exclusive=False
+    fi
+    export NTASKS=${npe_wavepostbndpnt}
     ;;
 
   "wavepostbndpntbll")
     export wtime_wavepostbndpntbll="01:00:00"
     export npe_wavepostbndpntbll=448
     export nth_wavepostbndpntbll=1
     export npe_node_wavepostbndpntbll=$(( npe_node_max / nth_wavepostbndpntbll ))
-    export NTASKS=${npe_wavepostbndpntbll}
     export is_exclusive=True
+    if [[ ${npe_node_wavepostbndpntbll} -gt 40 ]]; then
+        export npe_node_wavepostbndpntbll=40
+        export is_exclusive=False
+    fi
+    export NTASKS=${npe_wavepostbndpntbll}
     ;;
 
   "wavepostpnt")
     export wtime_wavepostpnt="04:00:00"
     export npe_wavepostpnt=200
     export nth_wavepostpnt=1
     export npe_node_wavepostpnt=$(( npe_node_max / nth_wavepostpnt ))
-    export NTASKS=${npe_wavepostpnt}
     export is_exclusive=True
+    if [[ ${npe_node_wavepostpnt} -gt 40 ]]; then
+        export npe_node_wavepostpnt=40
+        export is_exclusive=False
+    fi
+    export NTASKS=${npe_wavepostpnt}
     ;;
 
   *)

parm/config/gfs/config.resources

@@ -140,31 +140,45 @@ case ${step} in
     export memory_wavepostsbs_gfs="10GB"
     ;;
 
+  # The wavepost*pnt* jobs are I/O heavy and do not scale well to large nodes.
+  # Limit the number of tasks/node to 40.
   "wavepostbndpnt")
     export wtime_wavepostbndpnt="01:00:00"
     export npe_wavepostbndpnt=240
     export nth_wavepostbndpnt=1
     export npe_node_wavepostbndpnt=$(( npe_node_max / nth_wavepostbndpnt ))
-    export NTASKS=${npe_wavepostbndpnt}
     export is_exclusive=True
+    if [[ ${npe_node_wavepostbndpnt} -gt 40 ]]; then
+        export npe_node_wavepostbndpnt=40
+        export is_exclusive=False
+    fi
+    export NTASKS=${npe_wavepostbndpnt}
     ;;
 
   "wavepostbndpntbll")
     export wtime_wavepostbndpntbll="01:00:00"
     export npe_wavepostbndpntbll=448
     export nth_wavepostbndpntbll=1
     export npe_node_wavepostbndpntbll=$(( npe_node_max / nth_wavepostbndpntbll ))
-    export NTASKS=${npe_wavepostbndpntbll}
     export is_exclusive=True
+    if [[ ${npe_node_wavepostbndpntbll} -gt 40 ]]; then
+        export npe_node_wavepostbndpntbll=40
+        export is_exclusive=False
+    fi
+    export NTASKS=${npe_wavepostbndpntbll}
     ;;
 
   "wavepostpnt")
     export wtime_wavepostpnt="04:00:00"
     export npe_wavepostpnt=200
     export nth_wavepostpnt=1
     export npe_node_wavepostpnt=$(( npe_node_max / nth_wavepostpnt ))
-    export NTASKS=${npe_wavepostpnt}
     export is_exclusive=True
+    if [[ ${npe_node_wavepostpnt} -gt 40 ]]; then
+        export npe_node_wavepostpnt=40
+        export is_exclusive=False
+    fi
+    export NTASKS=${npe_wavepostpnt}
     ;;
 
   "wavegempak")