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+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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
+ *
+ * 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 ETHOSU_PROFILER_H
+#define ETHOSU_PROFILER_H
+
+#include "tensorflow/lite/kernels/internal/compatibility.h"
+#include <memory>
+#include <pmu_ethosu.h>
+
+// NOTE: This profiler only works on systems with 1 NPU due to the use of
+// ethosu_reserve_driver().
+namespace tflite {
+class EthosUProfiler : public MicroProfiler {
+public:
+ EthosUProfiler(ethosu_pmu_event_type event0 = ETHOSU_PMU_NO_EVENT,
+ ethosu_pmu_event_type event1 = ETHOSU_PMU_NO_EVENT,
+ ethosu_pmu_event_type event2 = ETHOSU_PMU_NO_EVENT,
+ ethosu_pmu_event_type event3 = ETHOSU_PMU_NO_EVENT,
+ size_t max_events = 200);
+ uint32_t BeginEvent(const char *tag);
+ void EndEvent(uint32_t event_handle);
+ uint64_t GetTotalTicks() const;
+ void Log() const;
+ uint32_t GetEthosuPMUCounter(int counter);
+
+private:
+ void MonitorEthosuPMUEvents(ethosu_pmu_event_type event0,
+ ethosu_pmu_event_type event1,
+ ethosu_pmu_event_type event2,
+ ethosu_pmu_event_type event3);
+
+ size_t max_events_;
+ std::unique_ptr<const char *[]> tags_;
+ std::unique_ptr<uint64_t[]> start_ticks_;
+ std::unique_ptr<uint64_t[]> end_ticks_;
+
+ int num_events_ = 0;
+
+ ethosu_pmu_event_type ethosu_pmu_cntrs[ETHOSU_PMU_NCOUNTERS];
+
+ uint32_t event_counters[ETHOSU_PMU_NCOUNTERS];
+
+ TF_LITE_REMOVE_VIRTUAL_DELETE;
+};
+
+} // namespace tflite
+
+#endif