This is a tool for processing systraces and summarizing how long it takes to start system_service services.
To run the tool, enter the root directory for the Trebuchet project and use the following command template: ./gradlew :trebuchet:system-server-analyzer:run --args="<trace_file> [-t threshold_ms] [-o output_file]".
If you do not already have a trace file to analyze you can follow the steps below:
1.Stop system_server: adb shell stop 2.Capture 10 seconds of tracing information using atrace: adb shell atrace -o /sdcard/atrace-ss.txt -t 10 ss 3.In another console, restart system_server: adb shell start 4.Pull the generate file: adb pull /sdcard/atrace-ss.txt
Below is an example of its output:
Opening `/tmp/atrace-ss.txt` Progress: 100.00% Parsing atrace-ss.txt took 171ms StartServices: 5982.37ms StartActivityManager: 87.21ms StartPowerManager: 5.04ms StartLightsService: 1012.62ms StartDisplayManager: 7.08ms WaitForDisplay: 23.80ms StartPackageManagerService: 3267.64ms StartOverlayManagerService: 128.18ms StartBatteryService: 24.33ms StartUsageService: 29.94ms StartRollbackManagerService: 5.24ms InstallSystemProviders: 55.23ms StartWindowManagerService: 148.52ms SetWindowManagerService: 10.88ms WindowManagerServiceOnInitReady: 18.26ms NetworkWatchlistService: 5.87ms StartAccessibilityManagerService: 31.93ms MakeDisplayReady: 19.62ms StartStorageManagerService: 7.46ms StartLockSettingsService: 28.12ms StartWifi: 65.78ms StartConnectivityService: 11.89ms StartNotificationManager: 16.70ms StartAudioService: 37.19ms StartUsbService: 17.25ms StartJobScheduler: 13.70ms StartMediaSessionService: 8.07ms MakeLockSettingsServiceReady: 89.10ms StartBootPhaseLockSettingsReady: 16.21ms StartBootPhaseSystemServicesReady: 83.95ms MakeWindowManagerServiceReady: 5.40ms MakePowerManagerServiceReady: 14.79ms MakePackageManagerServiceReady: 48.18ms PhaseActivityManagerReady: 456.15ms Other: 157.12ms