Quick Start Guide

Using Preset Mode

Trepn Profiler has six easy to use profiling presets. This section will help you understand what each of the presets is designed to do.

  1. CPU Frequency Overlay – This shows the speed of the first four cores of your processor. Because it is an on-screen overlay, you can run any app while observing the CPU frequencies. Use this preset to see how fast each of the cores are running. Processor speeds change very quickly so it’s normal for the numbers to jump around. Look at the blue graph lines to see a more precise history of the changes in frequency. To see which apps are using your processor, touch the back arrow to return to the home screen and run the ‘CPU Usage Monitor’ preset.

    Tip: If any of the overlays are covering an important part your application, you can drag them to a new location on the screen. You can also hide them by touching the white checkbox.

  2. Mobile Data Detective – Use this preset to identify which apps use the most cellular or Wi-Fi data. By default, this displays a list of applications sorted based on the amount of data they have used since you began profiling. If you want to sort the list of apps alphabetically, touch the ‘APPLICATION’ heading. It’s normal to see 0.0 next to each app at the beginning of a profiling session. Run this test for at least 10 minutes to identify which apps consume the most data. To see how much data an app uses while it’s running, launch that app after you start this preset.

    To run this test in the background first start Mobile Data Detective, and then press the Home button to return to the Android home screen. To return to Trepn Profiler, pull down the Notification bar and select "Trepn.” Pressing the left arrow or Back button will stop profiling and clear your profiled data. Don’t press Back until you are ready to stop profiling and return to the Trepn home screen. If you want to save the profiling data so you can analyze it later, use Advanced Mode, which is described below.

    Tip: If you prefer to view the amount of data consumed as an on-screen overlay, return to the Trepn Profiler preset-based home screen and launch Mobile Data Detective using the shortcut shown on the right.

  3. Performance Graph – This preset monitors the frequency and load of the CPU and GPU. Use it to determine whether your apps are using available system resources in an efficient manner. Well-engineered apps divide work between CPU cores and the GPU. An app that has a GPU load of 100% on a regular basis, with a relatively low CPU load is considered to be GPU constrained, and vice versa. Keep in mind a fair amount of the CPU activity on one of your CPU cores is generated by Trepn Profiler. A CPU load of 30% to 60% when your device is idle can mean your device has a lot of apps running in the background. By turning off or uninstalling problem apps, you can reduce the CPU load when your device is idle.


    Tip: Rotate your screen to see all of the performance graphs superimposed on each other. Slide out the legend on the right and tap any of the data points to turn them off. You can also pinch out to zoom in, or pinch in to zoom out and double-tap on the Y-axis to cycle between the units. If the graph appears to stop automatically scrolling, scroll all the way to the right or return to Live View by touching the icon shown above.

  4. CPU Usage Monitor – By default this preset displays applications in a list based on the percentage of CPU they have used over the last second. Consider stopping or uninstalling apps that use a lot of CPU when you are not using them. Touch the overlay button (shown on the right) to display the CPU usage for the top five apps as an overlay on top of any screen or application.

    Tip: You can switch between average and instantaneous readings in list view by touching the 3 dots near the top of the screen and selecting the desired option.

  5. CPU Load Overlay – This preset displays the load of the first four cores as an overlay on your screen. This shows how hard your processor is working as you run different applications. The blue graph line shows a more precise history of the changes in processor load. Keep in mind that some of the activity you are seeing on one of your CPU cores is generated by Trepn Profiler.

  6. Network Activity – This preset shows network-related activity and battery power. To view accurate battery power, make sure your device does not have a USB cable or charger connected to it. Not all mobile devices report accurate battery power readings. Refer to the Trepn Profiler FAQ for more info. The default view is a graph, but you can view this data as an overlay as well.

    Note: To see more activity on the Mobile Data State graph, turn Wi-Fi off.

Using Advanced Mode

Advanced Mode allows you to select which data points you want to profile and customize the overlays. You can also save the results of a profiling session to analyze later. This mode doesn’t use presets, so you need to manually configure the settings before profiling. Here is an example how you can profile using Advanced Mode.

  1. First, touch the icon that looks like a beaker to enter Advanced Mode.
  2. Then touch ‘Settings’ and select the data points and overlays you wish to profile.

    Keep in mind selecting any of the presets on the Trepn Profiler home screen will override all of the Advanced Mode settings, so it’s a good idea to save your preferences before returning to Preset Mode. This is done in the General Settings tab. Before you can save, you need to name the preference by touching near the bottom of the window. If the Save button isn’t visible after you enter a name, touch the Back button and then touch ‘Save.’

    Tip: You can save time by using one of the presets as a starting point for the creation of an Advanced Mode Setting. For example, if you have an 8-core processor and want to view all of the frequencies as an overlay on your tablet, start by touching the ‘CPU Frequency Overlay’ preset and then touch the left-arrow and switch to Advanced Mode. Now go to Settings/Overlays and you’ll see that four of the 8 cores are already set up. Add the remaining cores and save the new overlay as a Preference.

  3. Next, touch the Back button to return to the ‘Advanced Mode’ home screen.
  4. You are now ready to profile. Touch ‘Profile System’ or ‘Profile App’ to continue.
  5. Now select whether you wish to view the data as an overlay, graph or text (Stats view).
  6. When you are finished profiling, touch the Back button, or return to Trepn Profiler from the Notification bar.
  7. Finally, touch ‘Stop Profiling’ and select a save option. If you wish to analyze the data later,  you should select ‘Save as .db’
  8. To analyze a saved profile session, touch ‘Analyze Run’ and select from the list.

    Tip: Trepn Profiler will remember which mode you last used and automatically select it when you launch the app again. To return to the ‘Preset Mode’ home screen, use the slide out menu, or touch the icon that looks like four boxes.

How to Get Support

Support for this product is provided online. If you have questions, check our FAQ first. If you don’t find an answer there, try the Trepn Profiler product forum. You can also provide feedback from within the Trepn Profiler app using the ‘Feedback’ button in the navigation menu.