[native] Add runtime stats taskCreationTime

Author: kewang1024

presto-native-execution/presto_cpp/main/PrestoTask.cpp

@@ -769,6 +769,7 @@ void PrestoTask::updateTimeInfoLocked(
     taskRuntimeStats["endTime"].addValue(veloxTaskStats.endTimeMs);
   }
   taskRuntimeStats.insert({"nativeProcessCpuTime", fromNanos(processCpuTime_)});
+  taskRuntimeStats.insert({"taskCreationTime", fromNanos((createFinishTimeMs - createTimeMs) * 1'000'000)});
 }
 
 void PrestoTask::updateMemoryInfoLocked(

presto-native-execution/presto_cpp/main/PrestoTask.h

@@ -121,7 +121,10 @@ struct PrestoTask {
   uint64_t lastTaskStatsUpdateMs{0};
 
   uint64_t lastMemoryReservation{0};
+  /// Time point (in ms) when the time we start task creating.
   uint64_t createTimeMs{0};
+  /// Time point (in ms) when the time we finish task creating.
+  uint64_t createFinishTimeMs{0};
   uint64_t startTimeMs{0};
   uint64_t firstSplitStartTimeMs{0};
   uint64_t lastEndTimeMs{0};

presto-native-execution/presto_cpp/main/TaskManager.cpp

@@ -576,6 +576,7 @@ std::unique_ptr<TaskInfo> TaskManager::createOrUpdateTaskImpl(
     }
     execTask = prestoTask->task;
   }
+  prestoTask->createFinishTimeMs = getCurrentTimeMs();
   // Outside of prestoTask->mutex.
   VELOX_CHECK_NOT_NULL(
       execTask,