The information included in the raw hardware counter list is a subset of the information in the well-known hardware counter list. Each line includes the internal counter name as used by cpu-track(1), the register number(s) on which that counter can be used, the default overflow value, and the counter units, which can be either CPU-cycles or Events.
If the counter measures events unrelated to the program running, the first word of type information is not-program-related. For such a counter, profiling does not record a call stack, but instead shows the time being spent in an artificial function, collector_not_program_related . Thread and LWP ID’s are recorded, but are meaningless.
The default overflow value for raw counters is 1000003. This value is not ideal for most raw counters, so you should specify timeout values when specifying raw counters.