Instructions to Run (and modify) app-launcher script
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Introduction: app-launcher is a script that launches apps many times, measures various system metrics, computes basic stats for the metrics and reports that stats.

Setup:

1. Make sure the device is seen via 'adb devices' and authorize adb via the popup dialog.
2. Clear the setup wizard.
3. Login to an android user test account.
4. Clear the first time user dialogs on supported apps for your device (see below).
5. Enable wifi and connect to a network (ex. GoogleGuest).

Launching app-launcher : app-launcher -a|-b|-u [-c|-v|-s ] num-iterations -a:Run on all cores -b:Run only big cores -c:pagecached. Don't drop pagecache before each launch (not default) -h:Dump help menu' -u:user experience, no change to cpu/gpu frequencies or governors' -v:Optional, Verbose mode, prints stats on a lot of metrics. -s :Optional, specify serial number if multiple devices are attached to host num-iterations : Must be >= 100 to get statistically valid data.

Note, under -a|-b, we lock the CPU and GPU frequencies.

Apps Supported : On phone, these 4 apps are launched Chrome Camera Maps Youtube

On Fugu (Google TV), these 3 apps are launched YouTube Games Music

To add new apps, launch app manually and grep for package name + activity name in logcat and add these to the launch_phone_apps() function.

Adding support for new Devices to app-launcher : There are a few bits of code needed to do this.

1. Add a new cpufreq_ routine to fix the CPU/GPU frequencies as desired.
2. Add logic that checks the $model obtained and check against your device. (a) Then add code to call your cpufreq_ routine there (b) (Optional) Add code to get the /system block device pathname. This is only needed if you wan to get storage block device (/system) data.

Adding new Metrics to app-launcher : You can modify the way simpleperf is used in the script to collect different metrics, but that will require a change to getstats() to parse the output as necessary. Adding new storage stats or other stats collected from /proc (or /sys) is definitely possible, but code needs to be written for that - modeled after the disk_stats_before/after functions.

Notes :

Here are the commands to launch/stop the various Apps of interest. The way to find the package and activity for the app of interest is to launch the app and then grep for it in logcat to find the package+activity and use that in am start.

Chrome : adb shell 'simpleperf stat -a am start -W -n com.android.chrome/com.google.android.apps.chrome.Main' adb shell 'am force-stop com.android.chrome'

Camera : adb shell 'simpleperf stat -a am start -W -n com.google.android.GoogleCamera/com.android.camera.CameraActivity' adb shell 'am force-stop com.google.android.GoogleCamera'

Maps : adb shell 'simpleperf stat -a am start -W -n com.google.android.apps.maps/com.google.android.maps.MapsActivity' adb shell 'am force-stop com.google.android.apps.maps'

Youtube : adb shell 'am start -W -n com.google.android.youtube/com.google.android.apps.youtube.app.WatchWhileActivity' adb shell 'am force-stop com.google.android.youtube'