powerstats: Introduce CpupmStateResidencyDataProvider
Bug: 263276734
Bug: 264728626
Test: dumpsys android.hardware.power.stats.IPowerStats/default
Change-Id: I0887dde159d6f6ed1f5c470464eaf817ecc7b4eb
Signed-off-by: Darren Hsu <darrenhsu@google.com>
diff --git a/powerstats/CpupmStateResidencyDataProvider.cpp b/powerstats/CpupmStateResidencyDataProvider.cpp
new file mode 100644
index 0000000..bb0e61f
--- /dev/null
+++ b/powerstats/CpupmStateResidencyDataProvider.cpp
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2023 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 "CpupmStateResidencyDataProvider.h"
+
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/strings.h>
+
+#include <string>
+#include <utility>
+
+using android::base::ParseUint;
+using android::base::Split;
+using android::base::StartsWith;
+using android::base::Trim;
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace power {
+namespace stats {
+
+CpupmStateResidencyDataProvider::CpupmStateResidencyDataProvider(
+ const std::string &path, const Config &config)
+ : mPath(std::move(path)), mConfig(std::move(config)) {}
+
+int32_t CpupmStateResidencyDataProvider::matchState(char const *line) {
+ for (int32_t i = 0; i < mConfig.states.size(); i++) {
+ if (mConfig.states[i].second == Trim(std::string(line))) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+int32_t CpupmStateResidencyDataProvider::matchEntity(char const *line) {
+ for (int32_t i = 0; i < mConfig.entities.size(); i++) {
+ if (StartsWith(Trim(std::string(line)), mConfig.entities[i].second)) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+bool CpupmStateResidencyDataProvider::parseState(
+ char const *line, uint64_t *duration, uint64_t *count) {
+ std::vector<std::string> parts = Split(line, " ");
+ if (parts.size() != 5) {
+ return false;
+ }
+ if (!ParseUint(Trim(parts[1]), count)) {
+ return false;
+ }
+ if (!ParseUint(Trim(parts[3]), duration)) {
+ return false;
+ }
+ return true;
+}
+
+bool CpupmStateResidencyDataProvider::getStateResidencies(
+ std::unordered_map<std::string, std::vector<StateResidency>> *residencies) {
+ std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(mPath.c_str(), "r"), fclose);
+ if (!fp) {
+ PLOG(ERROR) << __func__ << ":Failed to open file " << mPath;
+ return false;
+ }
+
+ for (int32_t i = 0; i < mConfig.entities.size(); i++) {
+ std::vector<StateResidency> stateResidencies(mConfig.states.size());
+ for (int32_t j = 0; j < stateResidencies.size(); j++) {
+ stateResidencies[j].id = j;
+ }
+ residencies->emplace(mConfig.entities[i].first, stateResidencies);
+ }
+
+ size_t len = 0;
+ char *line = nullptr;
+
+ int32_t temp, entityIndex, stateId = -1;
+ uint64_t duration, count;
+ auto it = residencies->end();
+
+ while (getline(&line, &len, fp.get()) != -1) {
+ temp = matchState(line);
+ // Assign new id only when a new valid state is encountered.
+ if (temp >= 0) {
+ stateId = temp;
+ }
+
+ if (stateId >= 0) {
+ entityIndex = matchEntity(line);
+ it = residencies->find(mConfig.entities[entityIndex].first);
+
+ if (it != residencies->end()) {
+ if (parseState(line, &duration, &count)) {
+ it->second[stateId].totalTimeInStateMs = duration / US_TO_MS;
+ it->second[stateId].totalStateEntryCount = count;
+ } else {
+ LOG(ERROR) << "Failed to parse duration and count from [" << std::string(line)
+ << "]";
+ return false;
+ }
+ }
+ }
+ }
+
+ free(line);
+
+ return true;
+}
+
+std::unordered_map<std::string, std::vector<State>> CpupmStateResidencyDataProvider::getInfo() {
+ std::unordered_map<std::string, std::vector<State>> info;
+ for (auto const &entity : mConfig.entities) {
+ std::vector<State> stateInfo(mConfig.states.size());
+ int32_t stateId = 0;
+ for (auto const &state : mConfig.states) {
+ stateInfo[stateId] = State{
+ .id = stateId,
+ .name = state.first
+ };
+ stateId++;
+ }
+ info.emplace(entity.first, stateInfo);
+ }
+ return info;
+}
+
+} // namespace stats
+} // namespace power
+} // namespace hardware
+} // namespace android
+} // namespace aidl
diff --git a/powerstats/include/CpupmStateResidencyDataProvider.h b/powerstats/include/CpupmStateResidencyDataProvider.h
new file mode 100644
index 0000000..c04e11e
--- /dev/null
+++ b/powerstats/include/CpupmStateResidencyDataProvider.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2023 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 <PowerStatsAidl.h>
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace power {
+namespace stats {
+
+class CpupmStateResidencyDataProvider : public PowerStats::IStateResidencyDataProvider {
+ public:
+ class Config {
+ public:
+ // List of power entity name pairs (name to display, name to parse)
+ std::vector<std::pair<std::string, std::string>> entities;
+
+ // List of state pairs (state to display, state to parse).
+ std::vector<std::pair<std::string, std::string>> states;
+ };
+
+ /*
+ * path - path to cpupm sysfs node.
+ */
+ CpupmStateResidencyDataProvider(const std::string &path, const Config &config);
+ ~CpupmStateResidencyDataProvider() = default;
+
+ /*
+ * See IStateResidencyDataProvider::getStateResidencies
+ */
+ bool getStateResidencies(
+ std::unordered_map<std::string, std::vector<StateResidency>> *residencies) override;
+
+ /*
+ * See IStateResidencyDataProvider::getInfo
+ */
+ std::unordered_map<std::string, std::vector<State>> getInfo() override;
+
+ private:
+ int32_t matchEntity(char const *line);
+ int32_t matchState(char const *line);
+ bool parseState(char const *line, uint64_t *duration, uint64_t *count);
+
+ // A constant to represent the number of microseconds in one millisecond.
+ const uint64_t US_TO_MS = 1000;
+
+ const std::string mPath;
+ const Config mConfig;
+};
+
+} // namespace stats
+} // namespace power
+} // namespace hardware
+} // namespace android
+} // namespace aidl