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diff --git a/runtime/contrib/mlapse/tfl/mlapse/benchmark_observer.h b/runtime/contrib/mlapse/tfl/mlapse/benchmark_observer.h
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+++ b/runtime/contrib/mlapse/tfl/mlapse/benchmark_observer.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __MLAPSE_BENCHMARK_OBSERVER_H__
+#define __MLAPSE_BENCHMARK_OBSERVER_H__
+
+#include <cstdint>
+#include <chrono>
+
+namespace mlapse
+{
+
+enum Phase : int32_t
+{
+  // 0 denotes "uninitialized value"
+  Warmup = 1,
+  Record = 2,
+};
+
+Phase uninitialized_phase(void);
+
+enum Notification
+{
+  PhaseBegin,
+  PhaseEnd,
+  IterationBegin,
+  IterationEnd,
+};
+
+template <Notification N> struct NotificationArg;
+
+template <> struct NotificationArg<PhaseBegin>
+{
+  Phase phase;
+  uint32_t count;
+};
+
+template <> struct NotificationArg<PhaseEnd>
+{
+};
+
+template <> struct NotificationArg<IterationBegin>
+{
+  uint32_t index;
+};
+
+template <> struct NotificationArg<IterationEnd>
+{
+  std::chrono::milliseconds latency;
+};
+
+struct BenchmarkObserver
+{
+  virtual ~BenchmarkObserver() = default;
+
+  virtual void notify(const NotificationArg<PhaseBegin> &arg) = 0;
+  virtual void notify(const NotificationArg<PhaseEnd> &arg) = 0;
+  virtual void notify(const NotificationArg<IterationBegin> &arg) = 0;
+  virtual void notify(const NotificationArg<IterationEnd> &arg) = 0;
+};
+
+} // namespace mlpase
+
+#endif // __MLAPSE_BENCHMARK_OBSERVER_H__