Setting Instruments DTrace Preferences
Use the DTrace button to configure how DTrace based instruments act. DTrace instruments use dynamic tracing to access low-level kernel operations and user processes running on your device.
Open Preferences and click DTrace.
You can configure the following:
Buffer Size (megabytes): Set the size of the DTrace buffer. The default is 25 MB.
Max backtrace depth: Set the maximum stack depth that is captured when using a DTrace instrument. The default is 25 MB.
DTrace probe options: Configure the probe options for DTrace based instruments.
Permit zero match probes: Select to prevent an error when a specified probe is not found.
Preserve intermediate files: Select to prevent Instruments from removing intermediate files from the disk.
Flag runtime messages: Select to add flags to the timeline for status and error messages encountered during a recording.