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/*
* Copyright (C) 2018 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 <pixelhealth/BatteryMetricsLogger.h>
#include <pixelhealth/HealthHelper.h>
#include <pixelhealth/StatsHelper.h>
using aidl::android::hardware::health::BatteryStatus;
using aidl::android::hardware::health::HealthInfo;
namespace hardware {
namespace google {
namespace pixel {
namespace health {
VendorBatteryHealthSnapshot::BatterySnapshotType toBatterySnapshotType(int type) {
return static_cast<VendorBatteryHealthSnapshot::BatterySnapshotType>(type);
}
BatteryMetricsLogger::BatteryMetricsLogger(const char *const batt_res, const char *const batt_ocv,
const char *const batt_avg_res, int sample_period,
int upload_period)
: kBatteryResistance(batt_res),
kBatteryOCV(batt_ocv),
kBatteryAvgResistance(batt_avg_res),
kSamplePeriod(sample_period),
kUploadPeriod(upload_period),
kMaxSamples(upload_period / sample_period) {
last_sample_ = 0;
last_upload_ = 0;
num_samples_ = 0;
num_res_samples_ = 0;
memset(min_, 0, sizeof(min_));
memset(max_, 0, sizeof(max_));
}
int64_t BatteryMetricsLogger::getTime(void) {
return nanoseconds_to_seconds(systemTime(SYSTEM_TIME_BOOTTIME));
}
bool BatteryMetricsLogger::uploadOutlierMetric(const std::shared_ptr<IStats> &stats_client,
sampleType type) {
if (kStatsSnapshotType[type] < 0)
return false;
VendorBatteryHealthSnapshot min_stats_ss;
min_stats_ss.set_type(toBatterySnapshotType(kStatsSnapshotType[type]));
min_stats_ss.set_temperature_deci_celsius(min_[type][TEMP]);
min_stats_ss.set_voltage_micro_volt(min_[type][VOLT]);
min_stats_ss.set_current_micro_amps(min_[type][CURR]);
min_stats_ss.set_open_circuit_micro_volt(min_[type][OCV]);
min_stats_ss.set_resistance_micro_ohm(min_[type][RES]);
min_stats_ss.set_level_percent(min_[type][SOC]);
VendorBatteryHealthSnapshot max_stats_ss;
max_stats_ss.set_type(toBatterySnapshotType(kStatsSnapshotType[type] + 1));
max_stats_ss.set_temperature_deci_celsius(max_[type][TEMP]);
max_stats_ss.set_voltage_micro_volt(max_[type][VOLT]);
max_stats_ss.set_current_micro_amps(max_[type][CURR]);
max_stats_ss.set_open_circuit_micro_volt(max_[type][OCV]);
max_stats_ss.set_resistance_micro_ohm(max_[type][RES]);
max_stats_ss.set_level_percent(max_[type][SOC]);
reportBatteryHealthSnapshot(stats_client, min_stats_ss);
reportBatteryHealthSnapshot(stats_client, max_stats_ss);
return true;
}
bool BatteryMetricsLogger::uploadAverageBatteryResistance(
const std::shared_ptr<IStats> &stats_client) {
if (strlen(kBatteryAvgResistance) == 0) {
LOG(INFO) << "Sysfs path for average battery resistance not specified";
return true;
}
std::string file_content;
int32_t batt_avg_res;
if (!android::base::ReadFileToString(kBatteryAvgResistance, &file_content)) {
LOG(ERROR) << "Can't read " << kBatteryAvgResistance;
return false;
}
std::stringstream ss(file_content);
if (!(ss >> batt_avg_res)) {
LOG(ERROR) << "Can't parse average battery resistance " << file_content;
return false;
}
// Upload average metric
VendorBatteryHealthSnapshot avg_res_ss_stats;
avg_res_ss_stats.set_type(VendorBatteryHealthSnapshot::BATTERY_SNAPSHOT_TYPE_AVG_RESISTANCE);
avg_res_ss_stats.set_temperature_deci_celsius(0);
avg_res_ss_stats.set_voltage_micro_volt(0);
avg_res_ss_stats.set_current_micro_amps(0);
avg_res_ss_stats.set_open_circuit_micro_volt(0);
avg_res_ss_stats.set_resistance_micro_ohm(batt_avg_res);
avg_res_ss_stats.set_level_percent(0);
reportBatteryHealthSnapshot(stats_client, avg_res_ss_stats);
return true;
}
bool BatteryMetricsLogger::uploadMetrics(void) {
int64_t time = getTime();
if (last_sample_ == 0)
return false;
LOG(INFO) << "Uploading metrics at time " << std::to_string(time) << " w/ "
<< std::to_string(num_samples_) << " samples";
std::shared_ptr<IStats> stats_client = getStatsService();
if (!stats_client) {
LOG(ERROR) << "Unable to connect to Stats service";
return false;
}
// Only log and upload the min and max for metric types we want to upload
for (int metric = 0; metric < NUM_FIELDS; metric++) {
if ((metric == RES && num_res_samples_ == 0) || kStatsSnapshotType[metric] < 0)
continue;
std::string log_min = "min-" + std::to_string(metric) + " ";
std::string log_max = "max-" + std::to_string(metric) + " ";
for (int j = 0; j < NUM_FIELDS; j++) {
log_min += std::to_string(min_[metric][j]) + " ";
log_max += std::to_string(max_[metric][j]) + " ";
}
LOG(INFO) << log_min;
LOG(INFO) << log_max;
// Upload min/max metrics
uploadOutlierMetric(stats_client, static_cast<sampleType>(metric));
}
uploadAverageBatteryResistance(stats_client);
// Clear existing data
memset(min_, 0, sizeof(min_));
memset(max_, 0, sizeof(max_));
num_samples_ = 0;
num_res_samples_ = 0;
last_upload_ = time;
LOG(INFO) << "Finished uploading to tron";
return true;
}
bool BatteryMetricsLogger::recordSample(const HealthInfo &health_info) {
std::string resistance_str, ocv_str;
int32_t resistance, ocv;
int32_t time = getTime();
LOG(INFO) << "Recording a sample at time " << std::to_string(time);
if (!android::base::ReadFileToString(kBatteryResistance, &resistance_str)) {
LOG(ERROR) << "Can't read the battery resistance from " << kBatteryResistance;
resistance = -INT_MAX;
} else if (!(std::stringstream(resistance_str) >> resistance)) {
LOG(ERROR) << "Can't parse battery resistance value " << resistance_str;
resistance = -INT_MAX;
}
if (!android::base::ReadFileToString(kBatteryOCV, &ocv_str)) {
LOG(ERROR) << "Can't read open-circuit voltage (ocv) value from " << kBatteryOCV;
ocv = -INT_MAX;
} else if (!(std::stringstream(ocv_str) >> ocv)) {
LOG(ERROR) << "Can't parse open-circuit voltage (ocv) value " << ocv_str;
ocv = -INT_MAX;
}
int32_t sample[NUM_FIELDS] = {[TIME] = time,
[RES] = resistance,
[CURR] = health_info.batteryCurrentMicroamps,
[VOLT] = health_info.batteryVoltageMillivolts,
[TEMP] = health_info.batteryTemperatureTenthsCelsius,
[SOC] = health_info.batteryLevel,
[OCV] = ocv};
if (health_info.batteryStatus != BatteryStatus::CHARGING) {
num_res_samples_++;
}
// Only calculate the min and max for metric types we want to upload
for (int metric = 0; metric < NUM_FIELDS; metric++) {
// Discard resistance min/max when charging
if ((metric == RES && health_info.batteryStatus == BatteryStatus::CHARGING) ||
kStatsSnapshotType[metric] < 0)
continue;
if (num_samples_ == 0 || (metric == RES && num_res_samples_ == 0) ||
sample[metric] < min_[metric][metric]) {
for (int i = 0; i < NUM_FIELDS; i++) { // update new min with current sample
min_[metric][i] = sample[i];
}
}
if (num_samples_ == 0 || (metric == RES && num_res_samples_ == 0) ||
sample[metric] > max_[metric][metric]) {
for (int i = 0; i < NUM_FIELDS; i++) { // update new max with current sample
max_[metric][i] = sample[i];
}
}
}
num_samples_++;
last_sample_ = time;
return true;
}
void BatteryMetricsLogger::logBatteryProperties(const HealthInfo &health_info) {
int32_t time = getTime();
if (last_sample_ == 0 || time - last_sample_ >= kSamplePeriod)
recordSample(health_info);
if (last_sample_ - last_upload_ > kUploadPeriod || num_samples_ >= kMaxSamples)
uploadMetrics();
return;
}
void BatteryMetricsLogger::logBatteryProperties(struct android::BatteryProperties *props) {
logBatteryProperties(ToHealthInfo(props));
}
} // namespace health
} // namespace pixel
} // namespace google
} // namespace hardware
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