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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_time.h"
#include <string.h>
#include "arm_profiler.hpp"
#include <inttypes.h>
#include <stdio.h>
namespace tflite {
ArmProfiler::ArmProfiler(size_t max_events) : max_events_(max_events), num_events_(0) {
tags_ = std::make_unique<const char *[]>(max_events_);
start_ticks_ = std::make_unique<int32_t[]>(max_events_);
end_ticks_ = std::make_unique<int32_t[]>(max_events_);
}
uint32_t ArmProfiler::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_] - 1;
return num_events_++;
}
void ArmProfiler::EndEvent(uint32_t event_handle) {
TFLITE_DCHECK(event_handle < max_events_);
end_ticks_[event_handle] = GetCurrentTimeTicks();
}
uint64_t ArmProfiler::GetTotalTicks() const {
uint64_t ticks = 0;
for (size_t i = 0; i < num_events_; ++i) {
ticks += end_ticks_[i] - start_ticks_[i];
}
return ticks;
}
void ArmProfiler::ReportResults() const {
tflite::GetMicroErrorReporter()->Report("Profiler report, CPU cycles per operator:");
for (size_t i = 0; i < num_events_; ++i) {
tflite::GetMicroErrorReporter()->Report(
"%s : cycle_cnt : %u cycles", tags_[i], end_ticks_[i] - start_ticks_[i]);
}
}
} // namespace tflite
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