Conversion fail for ov::hint::performance_mode with UNDEFINED value (#15903)

* Update ov::hint::performance_hint UNDEFINED value from empty string to "UNDEFINED".
Update benchmark Python version.
Update the description about hint setting within benchmark APP README and help message.

* Drop the reduntant changes.

samples/cpp/benchmark_app/README.md

@@ -121,7 +121,7 @@ Options:
                                'throughput' or 'tput': device performance mode will be set to THROUGHPUT.
                                'cumulative_throughput' or 'ctput': device performance mode will be set to CUMULATIVE_THROUGHPUT.
                                'latency': device performance mode will be set to LATENCY.
-                               'none': no device performance mode will be set.
+                               'none': device performance mode will be set to UNDEFINED.
                               Using explicit 'nstreams' or other device-specific options, please set hint to 'none'
     -api "<sync/async>"       Optional (deprecated). Enable Sync/Async API. Default value is "async".
     -niter "<integer>"        Optional. Number of iterations. If not specified, the number of iterations is calculated depending on a device.

samples/cpp/benchmark_app/benchmark_app.hpp

@@ -41,7 +41,7 @@ static const char hint_message[] =
     "                               'cumulative_throughput' or 'ctput': device performance mode will be set to "
     "CUMULATIVE_THROUGHPUT.\n"
     "                               'latency': device performance mode will be set to LATENCY.\n"
-    "                               'none': no device performance mode will be set.\n"
+    "                               'none': device performance mode will be set to UNDEFINED.\n"
     "                              Using explicit 'nstreams' or other device-specific options, please set hint to "
     "'none'";
 

src/inference/dev_api/ie_performance_hints.hpp

@@ -13,7 +13,7 @@
 
 namespace InferenceEngine {
 struct PerfHintsConfig {
-    std::string ovPerfHint = "";
+    std::string ovPerfHint = "UNDEFINED";
     int ovPerfHintNumRequests = 0;
 
     /**
@@ -73,12 +73,12 @@ struct PerfHintsConfig {
      */
     static std::string CheckPerformanceHintValue(const std::string& val) {
         if (val == PluginConfigParams::LATENCY || val == PluginConfigParams::THROUGHPUT ||
-            val == PluginConfigParams::CUMULATIVE_THROUGHPUT || val == "")
+            val == PluginConfigParams::CUMULATIVE_THROUGHPUT || val == PluginConfigParams::UNDEFINED)
             return val;
         else
             IE_THROW() << "Wrong value for property key " << PluginConfigParams::KEY_PERFORMANCE_HINT
                        << ". Expected only " << PluginConfigParams::LATENCY << "/" << PluginConfigParams::THROUGHPUT
-                       << "/" << PluginConfigParams::CUMULATIVE_THROUGHPUT;
+                       << "/" << PluginConfigParams::CUMULATIVE_THROUGHPUT << "/" << PluginConfigParams::UNDEFINED;
     }
 
     /**

src/inference/include/ie/ie_plugin_config.hpp

@@ -268,6 +268,7 @@ DECLARE_CONFIG_VALUE(MODEL_PRIORITY_LOW);
 DECLARE_CONFIG_KEY(PERFORMANCE_HINT);
 DECLARE_CONFIG_VALUE(LATENCY);
 DECLARE_CONFIG_VALUE(THROUGHPUT);
+DECLARE_CONFIG_VALUE(UNDEFINED);
 DECLARE_CONFIG_VALUE(CUMULATIVE_THROUGHPUT);
 /**
  * @brief (Optional) config key that backs the (above) Performance Hints

src/inference/include/openvino/runtime/properties.hpp

@@ -302,7 +302,7 @@ enum class PerformanceMode {
 inline std::ostream& operator<<(std::ostream& os, const PerformanceMode& performance_mode) {
     switch (performance_mode) {
     case PerformanceMode::UNDEFINED:
-        return os << "";
+        return os << "UNDEFINED";
     case PerformanceMode::LATENCY:
         return os << "LATENCY";
     case PerformanceMode::THROUGHPUT:
@@ -323,7 +323,7 @@ inline std::istream& operator>>(std::istream& is, PerformanceMode& performance_m
         performance_mode = PerformanceMode::THROUGHPUT;
     } else if (str == "CUMULATIVE_THROUGHPUT") {
         performance_mode = PerformanceMode::CUMULATIVE_THROUGHPUT;
-    } else if (str == "") {
+    } else if (str == "UNDEFINED") {
         performance_mode = PerformanceMode::UNDEFINED;
     } else {
         throw ov::Exception{"Unsupported performance mode: " + str};

src/plugins/intel_gna/tests/unit/gna_plugin_config_test.cpp

@@ -29,9 +29,8 @@ const std::map<std::string, std::string>  supportedConfigKeysWithDefaults = {
     {GNA_CONFIG_KEY(LIB_N_THREADS), "1"},
     {CONFIG_KEY(SINGLE_THREAD), CONFIG_VALUE(YES)},
     {CONFIG_KEY(LOG_LEVEL), PluginConfigParams::LOG_NONE},
-    {CONFIG_KEY(PERFORMANCE_HINT), ""},
-    {CONFIG_KEY(PERFORMANCE_HINT_NUM_REQUESTS), "1"}
-};
+    {CONFIG_KEY(PERFORMANCE_HINT), "UNDEFINED"},
+    {CONFIG_KEY(PERFORMANCE_HINT_NUM_REQUESTS), "1"}};
 IE_SUPPRESS_DEPRECATED_END
 
 class GNAPluginConfigTest : public ::testing::Test {

tools/benchmark_tool/openvino/tools/benchmark/main.py

@@ -112,7 +112,7 @@ def main():
                 if is_flag_set_in_command_line('hint'):
                     if args.perf_hint=='none':
                         logger.warning(f"No device {device} performance hint is set.")
-                        args.perf_hint = ''
+                        args.perf_hint = 'UNDEFINED'
                 else:
                     args.perf_hint = "THROUGHPUT" if benchmark.api_type == "async" else "LATENCY"
                     logger.warning(f"Performance hint was not explicitly specified in command line. " +