Energy Usage Instrument
The Energy Usage instrument captures information about energy usage on a device since start up.
The Energy Usage instrument is associated with the following tasks:
Saving Energy with the Energy Diagnostics Trace Template
Energy Diagnostics template
Library pane (only appears when an iOS device is connected)
The Energy Usage instrument displays the recorded information in the track pane and the Detail pane.
The track pane displays the current energy usage on a scale of 0-20.
The Detail pane provides energy usage information in Table 22-1.
The time the state change occurred.
Energy Usage Level
Relative energy usage on a scale of 0-20. Each change
Figure 22-1 shows the Energy Usage instrument displaying an iOS device’s energy log.
You can configure how information is displayed in the track pane through the configuration dialog. Click the inspector icon to bring up the configuration dialog. Customize the following display options.
Target: Choose a target for this instrument. Available only if you choose Instrument Specific from the Target pop-up menu in the toolbar.
Track Display: Controls how information is displayed in the track pane, grouped by style, type, and zoom.
Style: How information is presented.
Energy Usage: Numeric representation of the current energy usage.
Type: How multiple parameters in one track are displayed.
Stacked: Each statistic has its own graph.
Overlay: All information is contained in one graph.
Zoom: The height of the data collection graph.