Use Offsets

ompi/communicator/comm_init.c

@@ -172,9 +172,10 @@ static int get_modified_ranks(uint32_t jobid, uint32_t vpid, size_t size,
     char pmix_dyn_id[sizeof(uint64_t) + 1] = "";
     char nspace[257] = "";
     if (NULL != pmix_id) {
-        char comma = ',';
-        strncat(pmix_dyn_id, &comma, 1);
-        strcat(pmix_dyn_id, pmix_id);
+        size_t did = 0;
+        sscanf(pmix_id, "%zu", &did);
+        did += vpid;
+        sprintf(pmix_dyn_id, ",%zu", did);
         printf("TEST PMIx Dynamic ID: %s", pmix_dyn_id);
 
         // PMIx Namespace