Update perf tool documentation to reflect the new graph optimization …

…enums. Relax constraint for enable_all.

onnxruntime/test/perftest/command_args_parser.cc

@@ -42,7 +42,12 @@ namespace perftest {
       "\t-v: Show verbose information.\n"
       "\t-x [thread_size]: Session thread pool size.\n"
       "\t-P: Use parallel executor instead of sequential executor.\n"
-      "\t-o [optimization level]: 0: disable optimization, 1: basic optimization, 2: extended optimization, 3: extended+layout optimization. \n"
+      "\t-o [optimization level]:\n"
+      "\t\t0: disable optimization\n"
+      "\t\t1: basic optimization\n"
+      "\t\t2: extended optimization\n"
+      "\t\t99: extended+layout optimization.\n"
+      "\t\tPlease see onnxruntime_c_api.h for the complete set of values. \n"
       "\t-h: help\n");
 }
 
@@ -143,8 +148,13 @@ namespace perftest {
           case ORT_ENABLE_ALL:
             test_config.run_config.optimization_level = ORT_ENABLE_ALL;
             break;
-          default:
-            return false;
+          default: {
+            if (tmp > ORT_ENABLE_ALL) {  // relax constraint
+              test_config.run_config.optimization_level = ORT_ENABLE_ALL;
+            } else {
+              return false;
+            }
+          }
         }
         break;
       }