coll/csel: load json as named subtrees

autogen.sh

@@ -531,7 +531,7 @@ fn_gen_binding_c() {
 
 fn_json_gen() {
     echo_n "generating json char arrays... "
-    ./maint/tuning/coll/json_gen.sh
+    ./maint/json_gen.sh
     echo "done"
 }
 

doc/mpich/tuning_parameters.md

@@ -124,7 +124,7 @@ node and on different nodes. This JSON file is used by setting
 `MPIR_CVAR_CH4_COLL_SELECTION_TUNING_JSON_FILE=/path/to/ch4_selection_tuning.json`.
 2. Coll: This file determines which algorithm used for inter or intra
 algorithms, depending on the composition. This JSON file can be used by
-setting `MPIR_CVAR_COLL_SELECTION_TUNING_JSON_FILE=/path/to/coll_selection_tuning.json`.
+setting `MPIR_CVAR_COLL_SELECTION_JSON_FILE=/path/to/coll_selection_tuning.json`.
 This file contains algorithm covered in the blocking collectives section
 (Section 2.3).
 3. Posix: This file determines algorithms to be used for intra node cases.

doc/wiki/notes/cvar.md

@@ -17,7 +17,7 @@ cvars:
       scope       : MPI_T_SCOPE_ALL_EQ
       description : |-
         Variable to select iallgather algorithm
-        auto - Internal algorithm selection (can be overridden with MPIR_CVAR_COLL_SELECTION_TUNING_JSON_FILE)
+        auto - Internal algorithm selection (can be overridden with MPIR_CVAR_COLL_SELECTION_JSON_FILE)
         ring               - Force ring algorithm
         brucks             - Force brucks algorithm
 

dummy

@@ -0,0 +1 @@
+1