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/*
* Copyright (c) 2021-2022 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.
*/
#include "tensorflow/lite/kernels/internal/compatibility.h"
#include "tensorflow/lite/micro/micro_error_reporter.h"
#include "tensorflow/lite/micro/micro_profiler.h"
#include "tensorflow/lite/micro/micro_time.h"
#include <string.h>
#include "ethosu_log.h"
#include "layer_by_layer_profiler.hpp"
#include <inttypes.h>
#include <stdio.h>
namespace tflite {
LayerByLayerProfiler::LayerByLayerProfiler(size_t max_events, Backend _backend, int32_t _event_id) :
max_events_(max_events), backend(_backend), event_id(_event_id), num_events_(0) {
tags_ = std::make_unique<const char *[]>(max_events);
start_ticks_ = std::make_unique<uint64_t[]>(max_events);
end_ticks_ = std::make_unique<uint64_t[]>(max_events);
}
// NOTE: THIS PROFILER ONLY WORKS ON SYSTEMS WITH 1 NPU
uint32_t LayerByLayerProfiler::BeginEvent(const char *tag) {
if (num_events_ == max_events_) {
tflite::GetMicroErrorReporter()->Report("Profiling event overflow, max: %u events", max_events_);
num_events_ = 0;
}
tags_[num_events_] = tag;
start_ticks_[num_events_] = GetCurrentTimeTicks();
end_ticks_[num_events_] =
start_ticks_[num_events_]; // NOTE: In case an EndEvent() doesn't trigger, cycles reports as 0
return num_events_++;
}
// NOTE: THIS PROFILER ONLY WORKS ON SYSTEMS WITH 1 NPU
void LayerByLayerProfiler::EndEvent(uint32_t event_handle) {
TFLITE_DCHECK(event_handle < max_events_);
end_ticks_[event_handle] = GetCurrentTimeTicks();
if (backend == PRINTF) {
LOG("%s : cycle_cnt : %" PRIu64 " cycles\n",
tags_[event_handle],
end_ticks_[event_handle] - start_ticks_[event_handle]);
} else {
EventRecord2(event_id, (int32_t)event_handle, end_ticks_[event_handle] - start_ticks_[event_handle]);
}
}
int32_t LayerByLayerProfiler::GetTotalTicks() const {
int32_t ticks = 0;
for (size_t i = 0; i < num_events_; ++i) {
ticks += static_cast<int32_t>(end_ticks_[i] - start_ticks_[i]);
}
return ticks;
}
void LayerByLayerProfiler::Log() const {
#if !defined(TF_LITE_STRIP_ERROR_STRINGS)
if (backend == PRINTF) {
for (size_t i = 0; i < num_events_; ++i) {
uint64_t ticks = end_ticks_[i] - start_ticks_[i];
LOG("%s took %" PRIu64 " cycles", tags_[i], ticks);
}
}
#endif
}
} // namespace tflite
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