| /* |
| * 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. |
| */ |
| |
| #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_profiler.hpp" |
| #include <ethosu_driver.h> |
| #include <inttypes.h> |
| #include <stdio.h> |
| |
| namespace { |
| |
| uint64_t GetCurrentEthosuTicks(struct ethosu_driver *drv) { |
| return ETHOSU_PMU_Get_CCNTR_v2(drv); |
| } |
| |
| } // namespace |
| |
| namespace tflite { |
| |
| EthosUProfiler::EthosUProfiler(size_t max_events) : max_events_(max_events) { |
| 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_); |
| |
| struct ethosu_driver *drv = ethosu_reserve_driver(); |
| ETHOSU_PMU_CNTR_Enable_v2(drv, ETHOSU_PMU_CCNT_Msk); |
| ETHOSU_PMU_CYCCNT_Reset_v2(drv); |
| ethosu_release_driver(drv); |
| } |
| |
| // NOTE: THIS PROFILER ONLY WORKS ON SYSTEMS WITH 1 NPU |
| uint32_t EthosUProfiler::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; |
| |
| if (strcmp("ethos-u", tag) == 0) { |
| struct ethosu_driver *ethosu_drv = ethosu_reserve_driver(); |
| ETHOSU_PMU_CYCCNT_Reset_v2(ethosu_drv); |
| ETHOSU_PMU_PMCCNTR_CFG_Set_Start_Event_v2(ethosu_drv, ETHOSU_PMU_NPU_ACTIVE); |
| ETHOSU_PMU_PMCCNTR_CFG_Set_Stop_Event_v2(ethosu_drv, ETHOSU_PMU_NPU_IDLE); |
| start_ticks_[num_events_] = GetCurrentEthosuTicks(ethosu_drv); |
| ethosu_release_driver(ethosu_drv); |
| } else { |
| start_ticks_[num_events_] = GetCurrentTimeTicks(); |
| } |
| |
| end_ticks_[num_events_] = start_ticks_[num_events_] - 1; |
| return num_events_++; |
| } |
| |
| // NOTE: THIS PROFILER ONLY WORKS ON SYSTEMS WITH 1 NPU |
| void EthosUProfiler::EndEvent(uint32_t event_handle) { |
| TFLITE_DCHECK(event_handle < max_events_); |
| |
| if (strcmp("ethos-u", tags_[event_handle]) == 0) { |
| struct ethosu_driver *ethosu_drv = ethosu_reserve_driver(); |
| end_ticks_[event_handle] = GetCurrentEthosuTicks(ethosu_drv); |
| ethosu_release_driver(ethosu_drv); |
| } else { |
| end_ticks_[event_handle] = GetCurrentTimeTicks(); |
| } |
| |
| printf("%s : cycle_cnt : %" PRIu64 " cycles\n", |
| tags_[event_handle], |
| end_ticks_[event_handle] - start_ticks_[event_handle]); |
| } |
| |
| uint64_t EthosUProfiler::GetTotalTicks() const { |
| uint64_t ticks = 0; |
| for (int i = 0; i < num_events_; ++i) { |
| ticks += end_ticks_[i] - start_ticks_[i]; |
| } |
| |
| return ticks; |
| } |
| |
| void EthosUProfiler::Log() const { |
| #if !defined(TF_LITE_STRIP_ERROR_STRINGS) |
| for (int i = 0; i < num_events_; ++i) { |
| uint64_t ticks = end_ticks_[i] - start_ticks_[i]; |
| printf("%s took %" PRIu64 " cycles\n", tags_[i], ticks); |
| } |
| #endif |
| } |
| |
| } // namespace tflite |