Performance monitor accuracy

Only events marked verified have gone through full verification. Events marked caveat have been verified within the limitations documented in the event description returned by the pm_initialize routine.

Events marked unverified have undefined accuracy. Use caution with unverified events. The Performance Monitor API is essentially providing a service to read hardware registers that might not have any meaningful content.

Users can experiment with unverified event counters and determine for themselves if they can be used for specific tuning situations.