The provider has priority over per-LWP libcpc usage (i.e. cputrack) for access to counters. In the same manner as cpustat, enabling probes causes all existing per-LWP counter contexts to be invalidated. As long as enabled probes remain active, the counters will remain unavailable to cputrack-type consumers.
Only one of cpustat and DTrace may use the counter hardware at any one time. Ownership of the counters is given on a first-come, first-served basis.