Use the Recording pane in the preferences window to configure how tracks are displayed in your trace documents.
Choose Instruments > Preferences, and click Recording.
You can configure the following options:
Option | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Recording location | Specifies the location where new Instruments documents are created. By default, this is a temporary directory. From this pop-up menu, choose Custom to use a different directory. | ||||||||||
Background sampling duration | Sets the length of a sample trace operating in the background. Type a numeric value in the field. Defaults to 5 seconds. | ||||||||||
Global keyboard shortcuts | Opens the Keyboard > Shortcuts > Services pane in the System Preferences app, as shown in the Keyboard > Shortcuts > Services pane in System Preferences. From here, you can assign keyboard shortcuts to development services, such as a service that automatically opens an Xcode project in Instruments and profiles it with the System Trace profiling template. | ||||||||||
Always use deferred mode | Performs data analysis for all traces after data collection is complete. | ||||||||||
Automatically time profile spinning applications | Automatically monitors for a spinning process while a trace is recorded. This can be a process other than the one being recorded. If detected, Instruments starts the Time Profiler instrument on the spinning process. | ||||||||||
DTrace max buffer size | Sets the size of the DTrace kernel buffer (in megabytes). The default is 25 MB. | ||||||||||
Dtrace max backtrace depth | Sets the maximum stack depth that is captured when using a DTrace instrument. The default is 128 frames. | ||||||||||
Permit zero match probes | Prevents an error when a specified DTrace probe is not found. | ||||||||||
Preserve intermediate files | Prevents Instruments from removing intermediate DTrace data output files from the disk. | ||||||||||
Flag runtime messages | Adds flags to the timeline for DTrace runtime status and error messages encountered during a recording. | ||||||||||
