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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 "BatteryMetricsLogger.h"
namespace device {
namespace google {
namespace crosshatch {
namespace health {
using ::hardware::google::pixelstats::V1_0::IPixelStats;
using BatterySnapshotType = ::hardware::google::pixelstats::V1_0::IPixelStats::BatterySnapshotType;
using BatteryHealthSnapshotArgs =
::hardware::google::pixelstats::V1_0::IPixelStats::BatteryHealthSnapshotArgs;
using android::sp;
BatteryMetricsLogger::BatteryMetricsLogger() {
last_sample_ = 0;
last_upload_ = 0;
num_res_samples_ = 0;
memset(min_, 0, sizeof(min_));
memset(max_, 0, sizeof(max_));
accum_resistance_ = 0;
}
int64_t BatteryMetricsLogger::getTime(void) {
return nanoseconds_to_seconds(systemTime(SYSTEM_TIME_BOOTTIME));
}
bool BatteryMetricsLogger::uploadOutlierMetric(sp<IPixelStats> client, sampleType type) {
BatteryHealthSnapshotArgs min_ss = {static_cast<BatterySnapshotType>(0),
min_[type][TEMP],
min_[type][VOLT],
min_[type][CURR],
min_[type][OCV],
min_[type][RES],
min_[type][SOC]};
BatteryHealthSnapshotArgs max_ss = {static_cast<BatterySnapshotType>(0),
max_[type][TEMP],
max_[type][VOLT],
max_[type][CURR],
max_[type][OCV],
max_[type][RES],
max_[type][SOC]};
switch (type) {
case TEMP:
min_ss.type = BatterySnapshotType::MIN_TEMP;
max_ss.type = BatterySnapshotType::MAX_TEMP;
break;
case RES:
min_ss.type = BatterySnapshotType::MIN_RESISTANCE;
max_ss.type = BatterySnapshotType::MAX_RESISTANCE;
break;
case VOLT:
min_ss.type = BatterySnapshotType::MIN_VOLTAGE;
max_ss.type = BatterySnapshotType::MAX_VOLTAGE;
break;
case CURR:
min_ss.type = BatterySnapshotType::MIN_CURRENT;
max_ss.type = BatterySnapshotType::MAX_CURRENT;
break;
case SOC:
min_ss.type = BatterySnapshotType::MIN_BATT_LEVEL;
max_ss.type = BatterySnapshotType::MAX_BATT_LEVEL;
break;
case OCV:
case TIME:
case NUM_FIELDS:
default:
LOG(ERROR) << "Can't upload metric of type " << std::to_string(type);
return false;
}
client->reportBatteryHealthSnapshot(min_ss);
client->reportBatteryHealthSnapshot(max_ss);
return true;
}
bool BatteryMetricsLogger::uploadMetrics(void) {
int64_t time = getTime();
int32_t avg_resistance = 0;
if (last_sample_ == 0)
return false;
LOG(INFO) << "Uploading metrics at time " << std::to_string(time) << " w/ "
<< std::to_string(num_res_samples_) << " samples";
if (num_res_samples_)
avg_resistance = accum_resistance_ / num_res_samples_;
LOG(INFO) << "Logging metrics to tron";
sp<IPixelStats> client = IPixelStats::tryGetService();
if (!client) {
LOG(ERROR) << "Unable to connect to PixelStats service";
return false;
}
// Only log and upload the min and max for metric types we want to upload
for (int metric = kMetricMin; metric <= kMetricMax; metric++) {
if (metric == RES && num_res_samples_ == 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(client, static_cast<sampleType>(metric));
}
// Upload average metric
BatteryHealthSnapshotArgs avg_res_ss = {
BatterySnapshotType::AVG_RESISTANCE, 0, 0, 0, 0, avg_resistance, 0};
if (num_res_samples_)
client->reportBatteryHealthSnapshot(avg_res_ss);
// Clear existing data
memset(min_, 0, sizeof(min_));
memset(max_, 0, sizeof(max_));
num_res_samples_ = 0;
last_upload_ = time;
accum_resistance_ = 0;
LOG(INFO) << "Finished uploading to tron";
return true;
}
bool BatteryMetricsLogger::recordSample(struct android::BatteryProperties *props) {
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";
resistance = 0;
} else if (!(resistance = stoi(resistance_str))) {
LOG(ERROR) << "Can't parse battery resistance value " << resistance_str;
}
if (!android::base::ReadFileToString(kBatteryOCV, &ocv_str)) {
LOG(ERROR) << "Can't read the open-circuit voltage (ocv) value";
ocv = 0;
} else if (!(ocv = stoi(ocv_str))) {
LOG(ERROR) << "Can't parse open-circuit voltage (ocv) value " << ocv_str;
}
int32_t sample[NUM_FIELDS] = {time,
resistance,
props->batteryCurrent,
props->batteryVoltage,
props->batteryTemperature,
props->batteryLevel,
ocv};
if (props->batteryStatus != android::BATTERY_STATUS_CHARGING) {
accum_resistance_ += resistance;
num_res_samples_++;
}
// Only calculate the min and max for metric types we want to upload
for (int metric = kMetricMin; metric <= kMetricMax; metric++) {
// Discard resistance min/max when charging
if (metric == RES && props->batteryStatus == android::BATTERY_STATUS_CHARGING)
continue;
if (last_sample_ == 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 (last_sample_ == 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];
}
}
}
last_sample_ = time;
return true;
}
void BatteryMetricsLogger::logBatteryProperties(struct android::BatteryProperties *props) {
int32_t time = getTime();
if (last_sample_ == 0 || time - last_sample_ >= kSamplePeriod)
recordSample(props);
if (last_sample_ - last_upload_ > kUploadPeriod || num_res_samples_ >= kMaxSamples)
uploadMetrics();
return;
}
} // namespace health
} // namespace crosshatch
} // namespace google
} // namespace device
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