aidl: thermal: Remove dependency on pixelstats HAL

Change-Id: Ic55d976ed3c8be8c6d34e1ceb2d7a6e2e3b9c49f
diff --git a/aidl/thermal/Android.bp b/aidl/thermal/Android.bp
index f398769..e615115 100644
--- a/aidl/thermal/Android.bp
+++ b/aidl/thermal/Android.bp
@@ -9,7 +9,6 @@
     "utils/thermal_files.cpp",
     "utils/power_files.cpp",
     "utils/powerhal_helper.cpp",
-    "utils/thermal_stats_helper.cpp",
     "utils/thermal_watcher.cpp",
   ],
   vendor: true,
@@ -27,19 +26,13 @@
     "libutils",
     "libnl",
     "libbinder_ndk",
-    "android.frameworks.stats-V2-ndk",
     "android.hardware.power-V1-ndk",
     "android.hardware.thermal-V1-ndk",
     "pixel-power-ext-V1-ndk",
-    "pixelatoms-cpp",
   ],
   static_libs: [
     "libpixelstats",
   ],
-  export_shared_lib_headers: [
-    "android.frameworks.stats-V2-ndk",
-    "pixelatoms-cpp",
-  ],
   cflags: [
     "-Wall",
     "-Werror",
diff --git a/aidl/thermal/Thermal.cpp b/aidl/thermal/Thermal.cpp
index 776341d..f70cedd 100644
--- a/aidl/thermal/Thermal.cpp
+++ b/aidl/thermal/Thermal.cpp
@@ -30,6 +30,8 @@
 
 namespace {
 
+using std::chrono::system_clock;
+
 ndk::ScopedAStatus initErrorStatus() {
     return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_STATE,
                                                             "ThermalHAL not initialized properly.");
@@ -522,84 +524,6 @@
     }
 }
 
-void Thermal::dumpStatsRecord(std::ostringstream *dump_buf, const StatsRecord &stats_record,
-                              std::string_view line_prefix) {
-    const auto now = boot_clock::now();
-    *dump_buf << line_prefix << "Time Since Last Stats Report: "
-              << std::chrono::duration_cast<std::chrono::minutes>(
-                         now - stats_record.last_stats_report_time)
-                         .count()
-              << " mins" << std::endl;
-    *dump_buf << line_prefix << "Time in State ms: [";
-    for (const auto &time_in_state : stats_record.time_in_state_ms) {
-        *dump_buf << time_in_state.count() << " ";
-    }
-    *dump_buf << "]" << std::endl;
-}
-
-void Thermal::dumpThermalStats(std::ostringstream *dump_buf) {
-    *dump_buf << "getThermalStatsInfo:" << std::endl;
-    *dump_buf << " Sensor Temp Stats Info:" << std::endl;
-    const auto &sensor_temp_stats_map_ = thermal_helper_.GetSensorTempStatsSnapshot();
-    const std::string sensor_temp_stats_line_prefix("    ");
-    for (const auto &sensor_temp_stats_pair : sensor_temp_stats_map_) {
-        *dump_buf << "  Sensor Name: " << sensor_temp_stats_pair.first << std::endl;
-        const auto &sensor_temp_stats = sensor_temp_stats_pair.second;
-        *dump_buf << "   Max Temp: " << sensor_temp_stats.max_temp << ", TimeStamp: "
-                  << system_clock::to_time_t(sensor_temp_stats.max_temp_timestamp) << std::endl;
-        *dump_buf << "   Min Temp: " << sensor_temp_stats.min_temp << ", TimeStamp: "
-                  << system_clock::to_time_t(sensor_temp_stats.min_temp_timestamp) << std::endl;
-        for (const auto &stats_by_threshold : sensor_temp_stats.stats_by_custom_threshold) {
-            *dump_buf << "   Record by Threshold: [";
-            for (const auto &threshold : stats_by_threshold.thresholds) {
-                *dump_buf << threshold << " ";
-            }
-            *dump_buf << "]" << std::endl;
-            if (stats_by_threshold.logging_name.has_value()) {
-                *dump_buf << "    Logging Name: " << stats_by_threshold.logging_name.value()
-                          << std::endl;
-            }
-            dumpStatsRecord(dump_buf, stats_by_threshold.stats_record,
-                            sensor_temp_stats_line_prefix);
-        }
-
-        if (sensor_temp_stats.stats_by_default_threshold.has_value()) {
-            *dump_buf << "   Record by Severity:" << std::endl;
-            dumpStatsRecord(dump_buf, sensor_temp_stats.stats_by_default_threshold.value(),
-                            sensor_temp_stats_line_prefix);
-        }
-    }
-    *dump_buf << " Sensor Cdev Request Stats Info:" << std::endl;
-    const auto &sensor_cdev_request_stats_map_ =
-            thermal_helper_.GetSensorCoolingDeviceRequestStatsSnapshot();
-    const std::string sensor_cdev_request_stats_line_prefix("     ");
-    for (const auto &sensor_cdev_request_stats_pair : sensor_cdev_request_stats_map_) {
-        *dump_buf << "  Sensor Name: " << sensor_cdev_request_stats_pair.first << std::endl;
-        for (const auto &cdev_request_stats_pair : sensor_cdev_request_stats_pair.second) {
-            *dump_buf << "   Cooling Device Name: " << cdev_request_stats_pair.first << std::endl;
-            const auto &request_stats = cdev_request_stats_pair.second;
-            for (const auto &stats_by_threshold : request_stats.stats_by_custom_threshold) {
-                *dump_buf << "    Record by Threshold: [";
-                for (const auto &threshold : stats_by_threshold.thresholds) {
-                    *dump_buf << threshold << " ";
-                }
-                *dump_buf << "]" << std::endl;
-                if (stats_by_threshold.logging_name.has_value()) {
-                    *dump_buf << "     Logging Name: " << stats_by_threshold.logging_name.value()
-                              << std::endl;
-                }
-                dumpStatsRecord(dump_buf, stats_by_threshold.stats_record,
-                                sensor_cdev_request_stats_line_prefix);
-            }
-            if (request_stats.stats_by_default_threshold.has_value()) {
-                *dump_buf << "    Record by All State" << std::endl;
-                dumpStatsRecord(dump_buf, request_stats.stats_by_default_threshold.value(),
-                                sensor_cdev_request_stats_line_prefix);
-            }
-        }
-    }
-}
-
 void Thermal::dumpThermalData(int fd) {
     std::ostringstream dump_buf;
 
@@ -729,7 +653,6 @@
         dumpThrottlingInfo(&dump_buf);
         dumpThrottlingRequestStatus(&dump_buf);
         dumpPowerRailInfo(&dump_buf);
-        dumpThermalStats(&dump_buf);
         {
             dump_buf << "getAIDLPowerHalInfo:" << std::endl;
             dump_buf << " Exist: " << std::boolalpha << thermal_helper_.isAidlPowerHalExist()
diff --git a/aidl/thermal/Thermal.h b/aidl/thermal/Thermal.h
index 74449c4..5dd5648 100644
--- a/aidl/thermal/Thermal.h
+++ b/aidl/thermal/Thermal.h
@@ -107,9 +107,6 @@
     void dumpThrottlingInfo(std::ostringstream *dump_buf);
     void dumpThrottlingRequestStatus(std::ostringstream *dump_buf);
     void dumpPowerRailInfo(std::ostringstream *dump_buf);
-    void dumpStatsRecord(std::ostringstream *dump_buf, const StatsRecord &stats_record,
-                         std::string_view line_prefix);
-    void dumpThermalStats(std::ostringstream *dump_buf);
     void dumpThermalData(int fd);
 };
 
diff --git a/aidl/thermal/thermal-helper.cpp b/aidl/thermal/thermal-helper.cpp
index d7411bc..928a7a3 100644
--- a/aidl/thermal/thermal-helper.cpp
+++ b/aidl/thermal/thermal-helper.cpp
@@ -140,11 +140,6 @@
         ret = false;
     }
 
-    if (!thermal_stats_helper_.initializeStats(config, sensor_info_map_,
-                                               cooling_device_info_map_)) {
-        LOG(FATAL) << "Failed to initialize thermal stats";
-    }
-
     for (auto const &name_status_pair : sensor_info_map_) {
         sensor_status_map_[name_status_pair.first] = {
                 .severity = ThrottlingSeverity::NONE,
@@ -421,7 +416,6 @@
             sensor_log << sensor_log_pair.first << ":" << sensor_log_pair.second << " ";
         }
         // Update sensor temperature time in state
-        thermal_stats_helper_.updateSensorTempStatsBySeverity(sensor_name, out->throttlingStatus);
         LOG(INFO) << sensor_name.data() << ":" << out->value << " raw data: " << sensor_log.str();
     }
 
@@ -944,8 +938,6 @@
         sensor_status.thermal_cached.temp = *temp;
         sensor_status.thermal_cached.timestamp = now;
     }
-    auto real_temp = (*temp) * sensor_info.multiplier;
-    thermal_stats_helper_.updateSensorTempStatsByThreshold(sensor_name, real_temp);
     return true;
 }
 
@@ -1089,7 +1081,7 @@
 
         thermal_throttling_.computeCoolingDevicesRequest(
                 name_status_pair.first, sensor_info, sensor_status.severity,
-                &cooling_devices_to_update, &thermal_stats_helper_);
+                &cooling_devices_to_update);
         if (min_sleep_ms > sleep_ms) {
             min_sleep_ms = sleep_ms;
         }
@@ -1115,11 +1107,6 @@
         }
     }
 
-    int count_failed_reporting = thermal_stats_helper_.reportStats();
-    if (count_failed_reporting != 0) {
-        LOG(ERROR) << "Failed to report " << count_failed_reporting << " thermal stats";
-    }
-
     return min_sleep_ms;
 }
 
diff --git a/aidl/thermal/thermal-helper.h b/aidl/thermal/thermal-helper.h
index 3b790e3..dad4fea 100644
--- a/aidl/thermal/thermal-helper.h
+++ b/aidl/thermal/thermal-helper.h
@@ -33,7 +33,6 @@
 #include "utils/powerhal_helper.h"
 #include "utils/thermal_files.h"
 #include "utils/thermal_info.h"
-#include "utils/thermal_stats_helper.h"
 #include "utils/thermal_throttling.h"
 #include "utils/thermal_watcher.h"
 
@@ -130,16 +129,6 @@
         return power_files_.GetPowerStatusMap();
     }
 
-    // Get Thermal Stats Sensor Map
-    const std::unordered_map<std::string, SensorTempStats> GetSensorTempStatsSnapshot() {
-        return thermal_stats_helper_.GetSensorTempStatsSnapshot();
-    }
-    // Get Thermal Stats Sensor, Binded Cdev State Request Map
-    const std::unordered_map<std::string, std::unordered_map<std::string, ThermalStats<int>>>
-    GetSensorCoolingDeviceRequestStatsSnapshot() {
-        return thermal_stats_helper_.GetSensorCoolingDeviceRequestStatsSnapshot();
-    }
-
     void sendPowerExtHint(const Temperature &t);
     bool isAidlPowerHalExist() { return power_hal_service_.isAidlPowerHalExist(); }
     bool isPowerHalConnected() { return power_hal_service_.isPowerHalConnected(); }
@@ -184,7 +173,6 @@
     std::unordered_map<std::string, std::unordered_map<ThrottlingSeverity, ThrottlingSeverity>>
             supported_powerhint_map_;
     PowerHalService power_hal_service_;
-    ThermalStatsHelper thermal_stats_helper_;
     mutable std::shared_mutex sensor_status_map_mutex_;
     std::unordered_map<std::string, SensorStatus> sensor_status_map_;
 };
diff --git a/aidl/thermal/utils/thermal_stats_helper.cpp b/aidl/thermal/utils/thermal_stats_helper.cpp
deleted file mode 100644
index daaaf1c..0000000
--- a/aidl/thermal/utils/thermal_stats_helper.cpp
+++ /dev/null
@@ -1,509 +0,0 @@
-/*
- * Copyright (C) 2022 The Android Open Source Project
- *
- * 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.
- */
-
-#include "thermal_stats_helper.h"
-
-#include <android-base/logging.h>
-#include <android/binder_manager.h>
-#include <hardware/google/pixel/pixelstats/pixelatoms.pb.h>
-
-#include <algorithm>
-#include <numeric>
-#include <string_view>
-
-namespace aidl {
-namespace android {
-namespace hardware {
-namespace thermal {
-namespace implementation {
-
-constexpr std::string_view kCustomThresholdSetSuffix("-TH-");
-constexpr std::string_view kCompressedThresholdSuffix("-CMBN-TH");
-
-using aidl::android::frameworks::stats::VendorAtom;
-namespace PixelAtoms = ::android::hardware::google::pixel::PixelAtoms;
-
-namespace {
-static std::shared_ptr<IStats> stats_client = nullptr;
-std::shared_ptr<IStats> getStatsService() {
-    static std::once_flag statsServiceFlag;
-    std::call_once(statsServiceFlag, []() {
-        const std::string instance = std::string() + IStats::descriptor + "/default";
-        bool isStatsDeclared = AServiceManager_isDeclared(instance.c_str());
-        if (!isStatsDeclared) {
-            LOG(ERROR) << "Stats service is not registered.";
-            return;
-        }
-        stats_client = IStats::fromBinder(
-                ndk::SpAIBinder(AServiceManager_waitForService(instance.c_str())));
-    });
-    return stats_client;
-}
-
-bool isRecordByDefaultThreshold(const std::variant<bool, std::unordered_set<std::string>>
-                                        &record_by_default_threshold_all_or_name_set_,
-                                std::string_view name) {
-    if (std::holds_alternative<bool>(record_by_default_threshold_all_or_name_set_)) {
-        return std::get<bool>(record_by_default_threshold_all_or_name_set_);
-    }
-    return std::get<std::unordered_set<std::string>>(record_by_default_threshold_all_or_name_set_)
-            .count(name.data());
-}
-
-template <typename T>
-int calculateThresholdBucket(const std::vector<T> &thresholds, T value) {
-    if (thresholds.empty()) {
-        LOG(VERBOSE) << "No threshold present, so bucket is " << value << " as int.";
-        return static_cast<int>(value);
-    }
-    auto threshold_idx = std::upper_bound(thresholds.begin(), thresholds.end(), value);
-    int bucket = (threshold_idx - thresholds.begin());
-    LOG(VERBOSE) << "For value: " << value << " bucket is: " << bucket;
-    return bucket;
-}
-
-}  // namespace
-
-bool ThermalStatsHelper::initializeStats(
-        const Json::Value &config,
-        const std::unordered_map<std::string, SensorInfo> &sensor_info_map_,
-        const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map_) {
-    StatsConfig stats_config;
-    if (!ParseStatsConfig(config, sensor_info_map_, cooling_device_info_map_, &stats_config)) {
-        LOG(ERROR) << "Failed to parse stats config";
-        return false;
-    }
-    bool is_initialized_ =
-            initializeSensorTempStats(stats_config.sensor_stats_info, sensor_info_map_) &&
-            initializeSensorCdevRequestStats(stats_config.cooling_device_request_info,
-                                             sensor_info_map_, cooling_device_info_map_);
-    if (is_initialized_) {
-        last_total_stats_report_time = boot_clock::now();
-        LOG(INFO) << "Thermal Stats Initialized Successfully";
-    }
-    return is_initialized_;
-}
-
-bool ThermalStatsHelper::initializeSensorCdevRequestStats(
-        const StatsInfo<int> &request_stats_info,
-        const std::unordered_map<std::string, SensorInfo> &sensor_info_map_,
-        const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map_) {
-    std::unique_lock<std::shared_mutex> _lock(sensor_cdev_request_stats_map_mutex_);
-    for (const auto &[sensor, sensor_info] : sensor_info_map_) {
-        for (const auto &binded_cdev_info_pair :
-             sensor_info.throttling_info->binded_cdev_info_map) {
-            const auto &cdev = binded_cdev_info_pair.first;
-            const auto &max_state =
-                    cooling_device_info_map_.at(binded_cdev_info_pair.first).max_state;
-            // Record by all state
-            if (isRecordByDefaultThreshold(
-                        request_stats_info.record_by_default_threshold_all_or_name_set_, cdev)) {
-                // if the number of states is greater / equal(as state starts from 0) than
-                // residency_buckets in atom combine the initial states
-                if (max_state >= kMaxStatsResidencyCount) {
-                    // buckets = [max_state -kMaxStatsResidencyCount + 1, ...max_state]
-                    //     idx = [1, .. max_state - (max_state - kMaxStatsResidencyCount + 1) + 1]
-                    //     idx = [1, .. kMaxStatsResidencyCount]
-                    const auto starting_state = max_state - kMaxStatsResidencyCount + 1;
-                    std::vector<int> thresholds(kMaxStatsResidencyCount);
-                    std::iota(thresholds.begin(), thresholds.end(), starting_state);
-                    const auto logging_name = cdev + kCompressedThresholdSuffix.data();
-                    ThresholdList<int> threshold_list(logging_name, thresholds);
-                    sensor_cdev_request_stats_map_[sensor][cdev]
-                            .stats_by_custom_threshold.emplace_back(threshold_list);
-                } else {
-                    // buckets = [0, 1, 2, 3, ...max_state]
-                    const auto default_threshold_time_in_state_size = max_state + 1;
-                    sensor_cdev_request_stats_map_[sensor][cdev].stats_by_default_threshold =
-                            StatsRecord(default_threshold_time_in_state_size);
-                }
-                LOG(INFO) << "Sensor Cdev user vote stats on basis of all state initialized for ["
-                          << sensor << "-" << cdev << "]";
-            }
-
-            // Record by custom threshold
-            if (request_stats_info.record_by_threshold.count(cdev)) {
-                for (const auto &threshold_list : request_stats_info.record_by_threshold.at(cdev)) {
-                    // check last threshold value(which is >= number of buckets as numbers in
-                    // threshold are strictly increasing from 0) is less than max_state
-                    if (threshold_list.thresholds.back() >= max_state) {
-                        LOG(ERROR) << "For sensor " << sensor << " bindedCdev: " << cdev
-                                   << "Invalid bindedCdev stats threshold: "
-                                   << threshold_list.thresholds.back() << " >= " << max_state;
-                        sensor_cdev_request_stats_map_.clear();
-                        return false;
-                    }
-                    sensor_cdev_request_stats_map_[sensor][cdev]
-                            .stats_by_custom_threshold.emplace_back(threshold_list);
-                    LOG(INFO)
-                            << "Sensor Cdev user vote stats on basis of threshold initialized for ["
-                            << sensor << "-" << cdev << "]";
-                }
-            }
-        }
-    }
-    return true;
-}
-
-bool ThermalStatsHelper::initializeSensorTempStats(
-        const StatsInfo<float> &sensor_stats_info,
-        const std::unordered_map<std::string, SensorInfo> &sensor_info_map_) {
-    std::unique_lock<std::shared_mutex> _lock(sensor_temp_stats_map_mutex_);
-    const int severity_time_in_state_size = kThrottlingSeverityCount;
-    for (const auto &[sensor, sensor_info] : sensor_info_map_) {
-        // Record by severity
-        if (sensor_info.is_watch &&
-            isRecordByDefaultThreshold(
-                    sensor_stats_info.record_by_default_threshold_all_or_name_set_, sensor)) {
-            // number of buckets = number of severity
-            sensor_temp_stats_map_[sensor].stats_by_default_threshold =
-                    StatsRecord(severity_time_in_state_size);
-            LOG(INFO) << "Sensor temp stats on basis of severity initialized for [" << sensor
-                      << "]";
-        }
-
-        // Record by custom threshold
-        if (sensor_stats_info.record_by_threshold.count(sensor)) {
-            for (const auto &threshold_list : sensor_stats_info.record_by_threshold.at(sensor)) {
-                sensor_temp_stats_map_[sensor].stats_by_custom_threshold.emplace_back(
-                        threshold_list);
-                LOG(INFO) << "Sensor temp stats on basis of threshold initialized for [" << sensor
-                          << "]";
-            }
-        }
-    }
-    return true;
-}
-
-void ThermalStatsHelper::updateStatsRecord(StatsRecord *stats_record, int new_state) {
-    const auto now = boot_clock::now();
-    const auto cur_state_duration = std::chrono::duration_cast<std::chrono::milliseconds>(
-            now - stats_record->cur_state_start_time);
-    LOG(VERBOSE) << "Adding duration " << cur_state_duration.count()
-                 << " for cur_state: " << stats_record->cur_state << " with value: "
-                 << stats_record->time_in_state_ms[stats_record->cur_state].count();
-    // Update last record end time
-    stats_record->time_in_state_ms[stats_record->cur_state] += cur_state_duration;
-    stats_record->cur_state_start_time = now;
-    stats_record->cur_state = new_state;
-}
-
-void ThermalStatsHelper::updateSensorCdevRequestStats(std::string_view sensor,
-                                                      std::string_view cdev, int new_value) {
-    std::unique_lock<std::shared_mutex> _lock(sensor_cdev_request_stats_map_mutex_);
-    if (!sensor_cdev_request_stats_map_.count(sensor.data()) ||
-        !sensor_cdev_request_stats_map_[sensor.data()].count(cdev.data())) {
-        return;
-    }
-    auto &request_stats = sensor_cdev_request_stats_map_[sensor.data()][cdev.data()];
-    for (auto &stats_by_threshold : request_stats.stats_by_custom_threshold) {
-        int value = calculateThresholdBucket(stats_by_threshold.thresholds, new_value);
-        if (value != stats_by_threshold.stats_record.cur_state) {
-            LOG(VERBOSE) << "Updating bindedCdev stats for sensor: " << sensor.data()
-                         << " , cooling_device: " << cdev.data() << " with new value: " << value;
-            updateStatsRecord(&stats_by_threshold.stats_record, value);
-        }
-    }
-
-    if (request_stats.stats_by_default_threshold.has_value()) {
-        auto &stats_record = request_stats.stats_by_default_threshold.value();
-        if (new_value != stats_record.cur_state) {
-            LOG(VERBOSE) << "Updating bindedCdev stats for sensor: " << sensor.data()
-                         << " , cooling_device: " << cdev.data()
-                         << " with new value: " << new_value;
-            updateStatsRecord(&stats_record, new_value);
-        }
-    }
-}
-
-void ThermalStatsHelper::updateSensorTempStatsByThreshold(std::string_view sensor,
-                                                          float temperature) {
-    std::unique_lock<std::shared_mutex> _lock(sensor_temp_stats_map_mutex_);
-    if (!sensor_temp_stats_map_.count(sensor.data())) {
-        return;
-    }
-    auto &sensor_temp_stats = sensor_temp_stats_map_[sensor.data()];
-    for (auto &stats_by_threshold : sensor_temp_stats.stats_by_custom_threshold) {
-        int value = calculateThresholdBucket(stats_by_threshold.thresholds, temperature);
-        if (value != stats_by_threshold.stats_record.cur_state) {
-            LOG(VERBOSE) << "Updating sensor stats for sensor: " << sensor.data()
-                         << " with value: " << value;
-            updateStatsRecord(&stats_by_threshold.stats_record, value);
-        }
-    }
-    if (temperature > sensor_temp_stats.max_temp) {
-        sensor_temp_stats.max_temp = temperature;
-        sensor_temp_stats.max_temp_timestamp = system_clock::now();
-    }
-    if (temperature < sensor_temp_stats.min_temp) {
-        sensor_temp_stats.min_temp = temperature;
-        sensor_temp_stats.min_temp_timestamp = system_clock::now();
-    }
-}
-
-void ThermalStatsHelper::updateSensorTempStatsBySeverity(std::string_view sensor,
-                                                         const ThrottlingSeverity &severity) {
-    std::unique_lock<std::shared_mutex> _lock(sensor_temp_stats_map_mutex_);
-    if (sensor_temp_stats_map_.count(sensor.data()) &&
-        sensor_temp_stats_map_[sensor.data()].stats_by_default_threshold.has_value()) {
-        auto &stats_record =
-                sensor_temp_stats_map_[sensor.data()].stats_by_default_threshold.value();
-        int value = static_cast<int>(severity);
-        if (value != stats_record.cur_state) {
-            LOG(VERBOSE) << "Updating sensor stats for sensor: " << sensor.data()
-                         << " with value: " << value;
-            updateStatsRecord(&stats_record, value);
-        }
-    }
-}
-
-int ThermalStatsHelper::reportStats() {
-    const auto curTime = boot_clock::now();
-    const auto since_last_total_stats_update_ms =
-            std::chrono::duration_cast<std::chrono::milliseconds>(curTime -
-                                                                  last_total_stats_report_time);
-    LOG(VERBOSE) << "Duration from last total stats update is: "
-                 << since_last_total_stats_update_ms.count();
-    if (since_last_total_stats_update_ms < kUpdateIntervalMs) {
-        LOG(VERBOSE) << "Time elapsed since last update less than " << kUpdateIntervalMs.count();
-        return 0;
-    }
-
-    const std::shared_ptr<IStats> stats_client = getStatsService();
-    if (!stats_client) {
-        LOG(ERROR) << "Unable to get AIDL Stats service";
-        return -1;
-    }
-    int count_failed_reporting =
-            reportAllSensorTempStats(stats_client) + reportAllSensorCdevRequestStats(stats_client);
-    last_total_stats_report_time = curTime;
-    return count_failed_reporting;
-}
-
-int ThermalStatsHelper::reportAllSensorTempStats(const std::shared_ptr<IStats> &stats_client) {
-    int count_failed_reporting = 0;
-    std::unique_lock<std::shared_mutex> _lock(sensor_temp_stats_map_mutex_);
-    for (auto &[sensor, temp_stats] : sensor_temp_stats_map_) {
-        for (size_t threshold_set_idx = 0;
-             threshold_set_idx < temp_stats.stats_by_custom_threshold.size(); threshold_set_idx++) {
-            auto &stats_by_threshold = temp_stats.stats_by_custom_threshold[threshold_set_idx];
-            std::string sensor_name = stats_by_threshold.logging_name.value_or(
-                    sensor + kCustomThresholdSetSuffix.data() + std::to_string(threshold_set_idx));
-            if (!reportSensorTempStats(stats_client, sensor_name, temp_stats,
-                                       &stats_by_threshold.stats_record)) {
-                count_failed_reporting++;
-            }
-        }
-        if (temp_stats.stats_by_default_threshold.has_value()) {
-            if (!reportSensorTempStats(stats_client, sensor, temp_stats,
-                                       &temp_stats.stats_by_default_threshold.value())) {
-                count_failed_reporting++;
-            }
-        }
-    }
-    return count_failed_reporting;
-}
-
-bool ThermalStatsHelper::reportSensorTempStats(const std::shared_ptr<IStats> &stats_client,
-                                               std::string_view sensor,
-                                               const SensorTempStats &sensor_temp_stats,
-                                               StatsRecord *stats_record) {
-    LOG(VERBOSE) << "Reporting sensor stats for " << sensor;
-    // maintain a copy in case reporting fails
-    StatsRecord thermal_stats_before_reporting = *stats_record;
-    std::vector<VendorAtomValue> values(2);
-    values[0].set<VendorAtomValue::stringValue>(sensor);
-    std::vector<int64_t> time_in_state_ms = processStatsRecordForReporting(stats_record);
-    const auto since_last_update_ms = std::chrono::duration_cast<std::chrono::milliseconds>(
-            stats_record->cur_state_start_time - stats_record->last_stats_report_time);
-    values[1].set<VendorAtomValue::longValue>(since_last_update_ms.count());
-    VendorAtomValue tmp;
-    for (auto &time_in_state : time_in_state_ms) {
-        tmp.set<VendorAtomValue::longValue>(time_in_state);
-        values.push_back(tmp);
-    }
-    auto remaining_residency_buckets_count = kMaxStatsResidencyCount - time_in_state_ms.size();
-    if (remaining_residency_buckets_count > 0) {
-        tmp.set<VendorAtomValue::longValue>(0);
-        values.insert(values.end(), remaining_residency_buckets_count, tmp);
-    }
-    tmp.set<VendorAtomValue::floatValue>(sensor_temp_stats.max_temp);
-    values.push_back(tmp);
-    tmp.set<VendorAtomValue::longValue>(
-            system_clock::to_time_t(sensor_temp_stats.max_temp_timestamp));
-    values.push_back(tmp);
-    tmp.set<VendorAtomValue::floatValue>(sensor_temp_stats.min_temp);
-    values.push_back(tmp);
-    tmp.set<VendorAtomValue::longValue>(
-            system_clock::to_time_t(sensor_temp_stats.min_temp_timestamp));
-    values.push_back(tmp);
-
-    if (!reportAtom(stats_client, PixelAtoms::Atom::kVendorTempResidencyStats, std::move(values))) {
-        LOG(ERROR) << "Unable to report VendorTempResidencyStats to Stats service for "
-                      "sensor: "
-                   << sensor;
-        *stats_record = restoreStatsRecordOnFailure(std::move(thermal_stats_before_reporting));
-        return false;
-    }
-    // Update last time of stats reporting
-    stats_record->last_stats_report_time = boot_clock::now();
-    return true;
-}
-
-int ThermalStatsHelper::reportAllSensorCdevRequestStats(
-        const std::shared_ptr<IStats> &stats_client) {
-    int count_failed_reporting = 0;
-    std::unique_lock<std::shared_mutex> _lock(sensor_cdev_request_stats_map_mutex_);
-    for (auto &[sensor, cdev_request_stats_map] : sensor_cdev_request_stats_map_) {
-        for (auto &[cdev, request_stats] : cdev_request_stats_map) {
-            for (size_t threshold_set_idx = 0;
-                 threshold_set_idx < request_stats.stats_by_custom_threshold.size();
-                 threshold_set_idx++) {
-                auto &stats_by_threshold =
-                        request_stats.stats_by_custom_threshold[threshold_set_idx];
-                std::string cdev_name = stats_by_threshold.logging_name.value_or(
-                        cdev + kCustomThresholdSetSuffix.data() +
-                        std::to_string(threshold_set_idx));
-                if (!reportSensorCdevRequestStats(stats_client, sensor, cdev_name,
-                                                  &stats_by_threshold.stats_record)) {
-                    count_failed_reporting++;
-                }
-            }
-
-            if (request_stats.stats_by_default_threshold.has_value()) {
-                if (!reportSensorCdevRequestStats(
-                            stats_client, sensor, cdev,
-                            &request_stats.stats_by_default_threshold.value())) {
-                    count_failed_reporting++;
-                }
-            }
-        }
-    }
-    return count_failed_reporting;
-}
-
-bool ThermalStatsHelper::reportSensorCdevRequestStats(const std::shared_ptr<IStats> &stats_client,
-                                                      std::string_view sensor,
-                                                      std::string_view cdev,
-                                                      StatsRecord *stats_record) {
-    LOG(VERBOSE) << "Reporting bindedCdev stats for sensor: " << sensor
-                 << " cooling_device: " << cdev;
-    // maintain a copy in case reporting fails
-    StatsRecord thermal_stats_before_reporting = *stats_record;
-    std::vector<VendorAtomValue> values(3);
-    values[0].set<VendorAtomValue::stringValue>(sensor);
-    values[1].set<VendorAtomValue::stringValue>(cdev);
-    std::vector<int64_t> time_in_state_ms = processStatsRecordForReporting(stats_record);
-    const auto since_last_update_ms = std::chrono::duration_cast<std::chrono::milliseconds>(
-            stats_record->cur_state_start_time - stats_record->last_stats_report_time);
-    values[2].set<VendorAtomValue::longValue>(since_last_update_ms.count());
-    VendorAtomValue tmp;
-    for (auto &time_in_state : time_in_state_ms) {
-        tmp.set<VendorAtomValue::longValue>(time_in_state);
-        values.push_back(tmp);
-    }
-
-    if (!reportAtom(stats_client, PixelAtoms::Atom::kVendorSensorCoolingDeviceStats,
-                    std::move(values))) {
-        LOG(ERROR) << "Unable to report VendorSensorCoolingDeviceStats to Stats "
-                      "service for sensor: "
-                   << sensor << " cooling_device: " << cdev;
-        *stats_record = restoreStatsRecordOnFailure(std::move(thermal_stats_before_reporting));
-        return false;
-    }
-    // Update last time of stats reporting
-    stats_record->last_stats_report_time = boot_clock::now();
-    return true;
-}
-
-std::vector<int64_t> ThermalStatsHelper::processStatsRecordForReporting(StatsRecord *stats_record) {
-    // update the last unclosed entry and start new record with same state
-    updateStatsRecord(stats_record, stats_record->cur_state);
-    std::vector<std::chrono::milliseconds> &time_in_state_ms = stats_record->time_in_state_ms;
-    // convert std::chrono::milliseconds time_in_state to int64_t vector for reporting
-    std::vector<int64_t> stats_residency(time_in_state_ms.size());
-    std::transform(time_in_state_ms.begin(), time_in_state_ms.end(), stats_residency.begin(),
-                   [](std::chrono::milliseconds time_ms) { return time_ms.count(); });
-    // clear previous stats
-    std::fill(time_in_state_ms.begin(), time_in_state_ms.end(), std::chrono::milliseconds::zero());
-    return stats_residency;
-}
-
-bool ThermalStatsHelper::reportAtom(const std::shared_ptr<IStats> &stats_client,
-                                    const int32_t &atom_id, std::vector<VendorAtomValue> &&values) {
-    LOG(VERBOSE) << "Reporting thermal stats for atom_id " << atom_id;
-    // Send vendor atom to IStats HAL
-    VendorAtom event = {.reverseDomainName = "", .atomId = atom_id, .values = std::move(values)};
-    const ndk::ScopedAStatus ret = stats_client->reportVendorAtom(event);
-    return ret.isOk();
-}
-
-StatsRecord ThermalStatsHelper::restoreStatsRecordOnFailure(
-        StatsRecord &&stats_record_before_failure) {
-    stats_record_before_failure.report_fail_count += 1;
-    // If consecutive count of failure is high, reset stat to avoid overflow
-    if (stats_record_before_failure.report_fail_count >= kMaxStatsReportingFailCount) {
-        return StatsRecord(stats_record_before_failure.time_in_state_ms.size(),
-                           stats_record_before_failure.cur_state);
-    } else {
-        return stats_record_before_failure;
-    }
-}
-
-std::unordered_map<std::string, SensorTempStats> ThermalStatsHelper::GetSensorTempStatsSnapshot() {
-    auto sensor_temp_stats_snapshot = sensor_temp_stats_map_;
-    for (auto &sensor_temp_stats_pair : sensor_temp_stats_snapshot) {
-        for (auto &temp_stats : sensor_temp_stats_pair.second.stats_by_custom_threshold) {
-            // update the last unclosed entry and start new record with same state
-            updateStatsRecord(&temp_stats.stats_record, temp_stats.stats_record.cur_state);
-        }
-        if (sensor_temp_stats_pair.second.stats_by_default_threshold.has_value()) {
-            auto &stats_by_default_threshold =
-                    sensor_temp_stats_pair.second.stats_by_default_threshold.value();
-            // update the last unclosed entry and start new record with same state
-            updateStatsRecord(&stats_by_default_threshold, stats_by_default_threshold.cur_state);
-        }
-    }
-    return sensor_temp_stats_snapshot;
-}
-
-std::unordered_map<std::string, std::unordered_map<std::string, ThermalStats<int>>>
-ThermalStatsHelper::GetSensorCoolingDeviceRequestStatsSnapshot() {
-    auto sensor_cdev_request_stats_snapshot = sensor_cdev_request_stats_map_;
-    for (auto &sensor_cdev_request_stats_pair : sensor_cdev_request_stats_snapshot) {
-        for (auto &cdev_request_stats_pair : sensor_cdev_request_stats_pair.second) {
-            for (auto &request_stats : cdev_request_stats_pair.second.stats_by_custom_threshold) {
-                // update the last unclosed entry and start new record with same state
-                updateStatsRecord(&request_stats.stats_record,
-                                  request_stats.stats_record.cur_state);
-            }
-            if (cdev_request_stats_pair.second.stats_by_default_threshold.has_value()) {
-                auto &stats_by_default_threshold =
-                        cdev_request_stats_pair.second.stats_by_default_threshold.value();
-                // update the last unclosed entry and start new record with same state
-                updateStatsRecord(&stats_by_default_threshold,
-                                  stats_by_default_threshold.cur_state);
-            }
-        }
-    }
-    return sensor_cdev_request_stats_snapshot;
-}
-
-}  // namespace implementation
-}  // namespace thermal
-}  // namespace hardware
-}  // namespace android
-}  // namespace aidl
diff --git a/aidl/thermal/utils/thermal_stats_helper.h b/aidl/thermal/utils/thermal_stats_helper.h
deleted file mode 100644
index ef2f811..0000000
--- a/aidl/thermal/utils/thermal_stats_helper.h
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
- * Copyright (C) 2022 The Android Open Source Project
- *
- * 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.
- */
-
-#pragma once
-
-#include <aidl/android/frameworks/stats/IStats.h>
-#include <aidl/android/hardware/thermal/Temperature.h>
-#include <android-base/chrono_utils.h>
-
-#include <chrono>
-#include <shared_mutex>
-#include <string_view>
-#include <unordered_map>
-#include <vector>
-
-#include "thermal_info.h"
-
-namespace aidl {
-namespace android {
-namespace hardware {
-namespace thermal {
-namespace implementation {
-
-using aidl::android::frameworks::stats::IStats;
-using aidl::android::frameworks::stats::VendorAtomValue;
-using ::android::base::boot_clock;
-using std::chrono::system_clock;
-using SystemTimePoint = std::chrono::time_point<std::chrono::system_clock>;
-
-constexpr int kMaxStatsReportingFailCount = 3;
-
-struct StatsRecord {
-    int cur_state; /* temperature / cdev state at current time */
-    boot_clock::time_point cur_state_start_time;
-    boot_clock::time_point last_stats_report_time = boot_clock::time_point::min();
-    std::vector<std::chrono::milliseconds> time_in_state_ms; /* stats array */
-    int report_fail_count = 0; /* Number of times failed to report stats */
-    explicit StatsRecord(const size_t &time_in_state_size, int state = 0)
-        : cur_state(state),
-          cur_state_start_time(boot_clock::now()),
-          last_stats_report_time(boot_clock::now()),
-          report_fail_count(0) {
-        time_in_state_ms = std::vector<std::chrono::milliseconds>(
-                time_in_state_size, std::chrono::milliseconds::zero());
-    }
-    StatsRecord() = default;
-    StatsRecord(const StatsRecord &) = default;
-    StatsRecord &operator=(const StatsRecord &) = default;
-    StatsRecord(StatsRecord &&) = default;
-    StatsRecord &operator=(StatsRecord &&) = default;
-    ~StatsRecord() = default;
-};
-
-template <typename ValueType>
-struct StatsByThreshold {
-    std::vector<ValueType> thresholds;
-    std::optional<std::string> logging_name;
-    StatsRecord stats_record;
-    explicit StatsByThreshold(ThresholdList<ValueType> threshold_list)
-        : thresholds(threshold_list.thresholds), logging_name(threshold_list.logging_name) {
-        // number of states = number of thresholds + 1
-        // e.g. threshold: [30, 50, 60]
-        //      buckets: [MIN - 30, 30 - 50, 50-60, 60-MAX]
-        int time_in_state_size = threshold_list.thresholds.size() + 1;
-        stats_record = StatsRecord(time_in_state_size);
-    }
-    StatsByThreshold() = default;
-    StatsByThreshold(const StatsByThreshold &) = default;
-    StatsByThreshold &operator=(const StatsByThreshold &) = default;
-    StatsByThreshold(StatsByThreshold &&) = default;
-    StatsByThreshold &operator=(StatsByThreshold &&) = default;
-    ~StatsByThreshold() = default;
-};
-
-template <typename ValueType>
-struct ThermalStats {
-    std::vector<StatsByThreshold<ValueType>> stats_by_custom_threshold;
-    std::optional<StatsRecord> stats_by_default_threshold;
-};
-
-struct SensorTempStats : ThermalStats<float> {
-    float max_temp = std::numeric_limits<float>::min();
-    SystemTimePoint max_temp_timestamp = SystemTimePoint::min();
-    float min_temp = std::numeric_limits<float>::max();
-    SystemTimePoint min_temp_timestamp = SystemTimePoint::min();
-};
-
-class ThermalStatsHelper {
-  public:
-    ThermalStatsHelper() = default;
-    ~ThermalStatsHelper() = default;
-    // Disallow copy and assign
-    ThermalStatsHelper(const ThermalStatsHelper &) = delete;
-    void operator=(const ThermalStatsHelper &) = delete;
-
-    bool initializeStats(const Json::Value &config,
-                         const std::unordered_map<std::string, SensorInfo> &sensor_info_map_,
-                         const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map_);
-    void updateSensorCdevRequestStats(std::string_view trigger_sensor, std::string_view cdev,
-                                      int new_state);
-    void updateSensorTempStatsBySeverity(std::string_view sensor,
-                                         const ThrottlingSeverity &severity);
-    void updateSensorTempStatsByThreshold(std::string_view sensor, float temperature);
-    /*
-     * Function to report all the stats by calling all specific stats reporting function.
-     * Returns:
-     *   0, if time_elapsed < kUpdateIntervalMs or if no failure in reporting
-     *  -1, if failed to get AIDL stats services
-     *  >0, count represents the number of stats failed to report.
-     */
-    int reportStats();
-    // Get a snapshot of Thermal Stats Sensor Map till that point in time
-    std::unordered_map<std::string, SensorTempStats> GetSensorTempStatsSnapshot();
-    // Get a snapshot of Thermal Stats Sensor Map till that point in time
-    std::unordered_map<std::string, std::unordered_map<std::string, ThermalStats<int>>>
-    GetSensorCoolingDeviceRequestStatsSnapshot();
-
-  private:
-    static constexpr std::chrono::milliseconds kUpdateIntervalMs =
-            std::chrono::duration_cast<std::chrono::milliseconds>(24h);
-    boot_clock::time_point last_total_stats_report_time = boot_clock::time_point::min();
-
-    mutable std::shared_mutex sensor_temp_stats_map_mutex_;
-    // Temperature stats for each sensor being watched
-    std::unordered_map<std::string, SensorTempStats> sensor_temp_stats_map_;
-    mutable std::shared_mutex sensor_cdev_request_stats_map_mutex_;
-    // userVote request stat for the sensor to the corresponding cdev (sensor -> cdev ->
-    // StatsRecord)
-    std::unordered_map<std::string, std::unordered_map<std::string, ThermalStats<int>>>
-            sensor_cdev_request_stats_map_;
-
-    bool initializeSensorTempStats(
-            const StatsInfo<float> &sensor_stats_info,
-            const std::unordered_map<std::string, SensorInfo> &sensor_info_map_);
-    bool initializeSensorCdevRequestStats(
-            const StatsInfo<int> &request_stats_info,
-            const std::unordered_map<std::string, SensorInfo> &sensor_info_map_,
-            const std::unordered_map<std::string, CdevInfo> &cooling_device_info_map_);
-    void updateStatsRecord(StatsRecord *stats_record, int new_state);
-    int reportAllSensorTempStats(const std::shared_ptr<IStats> &stats_client);
-    bool reportSensorTempStats(const std::shared_ptr<IStats> &stats_client, std::string_view sensor,
-                               const SensorTempStats &sensor_temp_stats, StatsRecord *stats_record);
-    int reportAllSensorCdevRequestStats(const std::shared_ptr<IStats> &stats_client);
-    bool reportSensorCdevRequestStats(const std::shared_ptr<IStats> &stats_client,
-                                      std::string_view sensor, std::string_view cdev,
-                                      StatsRecord *stats_record);
-    bool reportAtom(const std::shared_ptr<IStats> &stats_client, const int32_t &atom_id,
-                    std::vector<VendorAtomValue> &&values);
-    std::vector<int64_t> processStatsRecordForReporting(StatsRecord *stats_record);
-    StatsRecord restoreStatsRecordOnFailure(StatsRecord &&stats_record_before_failure);
-};
-
-}  // namespace implementation
-}  // namespace thermal
-}  // namespace hardware
-}  // namespace android
-}  // namespace aidl
diff --git a/aidl/thermal/utils/thermal_throttling.cpp b/aidl/thermal/utils/thermal_throttling.cpp
index 8aac95d..d90ed9b 100644
--- a/aidl/thermal/utils/thermal_throttling.cpp
+++ b/aidl/thermal/utils/thermal_throttling.cpp
@@ -658,8 +658,7 @@
 
 void ThermalThrottling::computeCoolingDevicesRequest(
         std::string_view sensor_name, const SensorInfo &sensor_info,
-        const ThrottlingSeverity curr_severity, std::vector<std::string> *cooling_devices_to_update,
-        ThermalStatsHelper *thermal_stats_helper) {
+        const ThrottlingSeverity curr_severity, std::vector<std::string> *cooling_devices_to_update) {
     int release_step = 0;
     std::unique_lock<std::shared_mutex> _lock(thermal_throttling_status_map_mutex_);
 
@@ -726,9 +725,6 @@
                 cooling_devices_to_update->emplace_back(cdev_name);
             }
             cdev_request_pair.second = request_state;
-            // Update sensor cdev request time in state
-            thermal_stats_helper->updateSensorCdevRequestStats(sensor_name, cdev_name,
-                                                               cdev_request_pair.second);
         }
     }
 }
diff --git a/aidl/thermal/utils/thermal_throttling.h b/aidl/thermal/utils/thermal_throttling.h
index e83ee06..01e9e60 100644
--- a/aidl/thermal/utils/thermal_throttling.h
+++ b/aidl/thermal/utils/thermal_throttling.h
@@ -27,7 +27,6 @@
 
 #include "power_files.h"
 #include "thermal_info.h"
-#include "thermal_stats_helper.h"
 
 namespace aidl {
 namespace android {
@@ -86,8 +85,7 @@
     // Compute the throttling target from all the sensors' request
     void computeCoolingDevicesRequest(std::string_view sensor_name, const SensorInfo &sensor_info,
                                       const ThrottlingSeverity curr_severity,
-                                      std::vector<std::string> *cooling_devices_to_update,
-                                      ThermalStatsHelper *thermal_stats_helper);
+                                      std::vector<std::string> *cooling_devices_to_update);
     // Get the aggregated (from all sensor) max request for a cooling device
     bool getCdevMaxRequest(std::string_view cdev_name, int *max_state);