Adding node criticality desc

README.md

@@ -96,6 +96,13 @@ the task inter-dependency constraints (as denoted by the structure of the HPVM D
 To add a new task type to this pass, users must simply add a new task type entry to `__hpvm__task` and create the
 entry for the name of the specific scheduler api calls to the task library configuration file.
 
+Additionally we provide the notion of node criticality which enable optionally distinguishing which nodes should be prioritised
+by the scheduler. Users can provide this optional criticality argument to the `__hpvm__createNodeND` call. The supported criticalities
+, in increasing criticality, are:
+1. `HPVM_BASE` (Default)
+2. `HPVM_ELEVATED`
+3. `HPVM_CRITICAL`
+
 
 ## Support