power.stats: Add more informative default implementation
The original default implementation for power.stats HAL did not have a
good example implementation of the power statistics related APIs. Adding
a new default implementation that gives a more informative example
Bug: 122267057
Test: run vts -m VtsHalPowerStatsV1_0Target
Test: adb shell "lshal debug android.hardware.power.stats@1.0::IPowerStats/default"
Observed the following output
========== PowerStats HAL 1.0 state residencies ==========
Entity State Total time Total entries Last entry timestamp
DefaultEntity Active 1 ms 2 3 ms
DefaultEntity Sleep 4 ms 5 6 ms
========== End of PowerStats HAL 1.0 state residencies ==========
Change-Id: Ida0951c267f609b16bb6406da150ed2e504ced9a
diff --git a/power/stats/1.0/default/service.cpp b/power/stats/1.0/default/service.cpp
index 80649f5..a516536 100644
--- a/power/stats/1.0/default/service.cpp
+++ b/power/stats/1.0/default/service.cpp
@@ -31,17 +31,69 @@
// Generated HIDL files
using android::hardware::power::stats::V1_0::IPowerStats;
+using android::hardware::power::stats::V1_0::PowerEntityStateResidencyResult;
+using android::hardware::power::stats::V1_0::PowerEntityStateSpace;
+using android::hardware::power::stats::V1_0::PowerEntityType;
+using android::hardware::power::stats::V1_0::implementation::IStateResidencyDataProvider;
using android::hardware::power::stats::V1_0::implementation::PowerStats;
+class DefaultStateResidencyDataProvider : public IStateResidencyDataProvider {
+ public:
+ DefaultStateResidencyDataProvider(uint32_t id)
+ : mPowerEntityId(id), mActiveStateId(0), mSleepStateId(1) {}
+ ~DefaultStateResidencyDataProvider() = default;
+
+ bool getResults(std::unordered_map<uint32_t, PowerEntityStateResidencyResult>& results) {
+ PowerEntityStateResidencyResult result = { .powerEntityId = mPowerEntityId };
+ result.stateResidencyData.resize(2);
+
+ // Using fake numbers here for display only. A real implementation would
+ // use actual tracked stats.
+ result.stateResidencyData[0] = {
+ .powerEntityStateId = mActiveStateId,
+ .totalTimeInStateMs = 1,
+ .totalStateEntryCount = 2,
+ .lastEntryTimestampMs = 3
+ };
+ result.stateResidencyData[1] = {
+ .powerEntityStateId = mSleepStateId,
+ .totalTimeInStateMs = 4,
+ .totalStateEntryCount = 5,
+ .lastEntryTimestampMs = 6,
+ };
+ results.emplace(mPowerEntityId, result);
+ return true;
+ }
+
+ std::vector<PowerEntityStateSpace> getStateSpaces() {
+ return {{
+ .powerEntityId = mPowerEntityId,
+ .states = {
+ {.powerEntityStateId = mActiveStateId, .powerEntityStateName = "Active"},
+ {.powerEntityStateId = mSleepStateId, .powerEntityStateName = "Sleep"}
+ }
+ }};
+ }
+
+ private:
+ const uint32_t mPowerEntityId;
+ const uint32_t mActiveStateId;
+ const uint32_t mSleepStateId;
+};
+
int main(int /* argc */, char** /* argv */) {
ALOGI("power.stats service 1.0 is starting.");
- android::sp<IPowerStats> service = new PowerStats();
+ PowerStats* service = new PowerStats();
if (service == nullptr) {
ALOGE("Can not create an instance of power.stats HAL Iface, exiting.");
return 1;
}
+ uint32_t defaultId = service->addPowerEntity("DefaultEntity", PowerEntityType::SUBSYSTEM);
+ auto defaultSdp = std::make_shared<DefaultStateResidencyDataProvider>(defaultId);
+ service->addStateResidencyDataProvider(std::move(defaultSdp));
+
configureRpcThreadpool(1, true /*callerWillJoin*/);
status_t status = service->registerAsService();