profile
Probe Creation
Unlike other providers, the profile
provider creates probes dynamically based on the requirement. Thus, the desired profile probe might not appear in a listing of all probes but the probe will be created when it is explicitly enabled. You can use the dtrace -l -P profile
to list all the probes.
On architectures that support arbitrary resolution
profile
probes, a time interval that is
too short causes the system
to continuously field time-based interrupts, thereby denying service
on the system.
To prevent this situation, the profile
provider
silently refuses to create any probe that would result in an
interval of less than two hundred microseconds.