Merge "bootstat: Calculate and log the absolute device boot time."
diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index 6f25d96..d4e215e 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -221,19 +221,24 @@
}
}
-// Parses and records the set of bootloader stages and associated boot times
-// from the ro.boot.boottime system property.
-void RecordBootloaderTimings(BootEventRecordStore* boot_event_store) {
- // |ro.boot.boottime| is of the form 'stage1:time1,...,stageN:timeN'.
+// A map from bootloader timing stage to the time that stage took during boot.
+typedef std::map<std::string, int32_t> BootloaderTimingMap;
+
+// Returns a mapping from bootloader stage names to the time those stages
+// took to boot.
+const BootloaderTimingMap GetBootLoaderTimings() {
+ BootloaderTimingMap timings;
+
+ // |ro.boot.boottime| is of the form 'stage1:time1,...,stageN:timeN',
+ // where timeN is in milliseconds.
std::string value = GetProperty("ro.boot.boottime");
if (value.empty()) {
// ro.boot.boottime is not reported on all devices.
- return;
+ return BootloaderTimingMap();
}
- int32_t total_time = 0;
auto stages = android::base::Split(value, ",");
- for (auto const &stageTiming : stages) {
+ for (const auto& stageTiming : stages) {
// |stageTiming| is of the form 'stage:time'.
auto stageTimingValues = android::base::Split(stageTiming, ":");
DCHECK_EQ(2, stageTimingValues.size());
@@ -241,23 +246,53 @@
std::string stageName = stageTimingValues[0];
int32_t time_ms;
if (android::base::ParseInt(stageTimingValues[1], &time_ms)) {
- total_time += time_ms;
- boot_event_store->AddBootEventWithValue(
- "boottime.bootloader." + stageName, time_ms);
+ timings[stageName] = time_ms;
}
}
+ return timings;
+}
+
+// Parses and records the set of bootloader stages and associated boot times
+// from the ro.boot.boottime system property.
+void RecordBootloaderTimings(BootEventRecordStore* boot_event_store,
+ const BootloaderTimingMap& bootloader_timings) {
+ int32_t total_time = 0;
+ for (const auto& timing : bootloader_timings) {
+ total_time += timing.second;
+ boot_event_store->AddBootEventWithValue("boottime.bootloader." + timing.first, timing.second);
+ }
+
boot_event_store->AddBootEventWithValue("boottime.bootloader.total", total_time);
}
+// Records the closest estimation to the absolute device boot time, i.e.,
+// from power on to boot_complete, including bootloader times.
+void RecordAbsoluteBootTime(BootEventRecordStore* boot_event_store,
+ const BootloaderTimingMap& bootloader_timings,
+ std::chrono::milliseconds uptime) {
+ int32_t bootloader_time_ms = 0;
+
+ for (const auto& timing : bootloader_timings) {
+ if (timing.first.compare("SW") != 0) {
+ bootloader_time_ms += timing.second;
+ }
+ }
+
+ auto bootloader_duration = std::chrono::milliseconds(bootloader_time_ms);
+ auto absolute_total =
+ std::chrono::duration_cast<std::chrono::seconds>(bootloader_duration + uptime);
+ boot_event_store->AddBootEventWithValue("absolute_boot_time", absolute_total.count());
+}
+
// Records several metrics related to the time it takes to boot the device,
// including disambiguating boot time on encrypted or non-encrypted devices.
void RecordBootComplete() {
BootEventRecordStore boot_event_store;
BootEventRecordStore::BootEventRecord record;
- auto uptime = std::chrono::duration_cast<std::chrono::seconds>(
- android::base::boot_clock::now().time_since_epoch());
+ auto time_since_epoch = android::base::boot_clock::now().time_since_epoch();
+ auto uptime = std::chrono::duration_cast<std::chrono::seconds>(time_since_epoch);
time_t current_time_utc = time(nullptr);
if (boot_event_store.GetBootEvent("last_boot_time_utc", &record)) {
@@ -290,7 +325,6 @@
std::chrono::seconds boot_complete = std::chrono::seconds(uptime.count() - record.second);
boot_event_store.AddBootEventWithValue(boot_complete_prefix + "_post_decrypt",
boot_complete.count());
-
} else {
boot_event_store.AddBootEventWithValue(boot_complete_prefix + "_no_encryption",
uptime.count());
@@ -304,7 +338,11 @@
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.selinux");
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.cold_boot_wait");
- RecordBootloaderTimings(&boot_event_store);
+ const BootloaderTimingMap bootloader_timings = GetBootLoaderTimings();
+ RecordBootloaderTimings(&boot_event_store, bootloader_timings);
+
+ auto uptime_ms = std::chrono::duration_cast<std::chrono::milliseconds>(time_since_epoch);
+ RecordAbsoluteBootTime(&boot_event_store, bootloader_timings, uptime_ms);
}
// Records the boot_reason metric by querying the ro.boot.bootreason system
