This event is logical processor specific. However, do to an ESCR restriction that prevents both logical processors from being sampled in the same run, the event has been programmed to be thread independent. The sample count measured is the total number of events that occurred on the physical processor package. The event interrupt for thread independent events is set on logical processor 0. Sample counts for the total system are accurate by physical processor package. However, sample counts at a particular IP address at the process, module, function, or source code many not be accurate. That's because sample counts on logical processor 1 at a particular IP address will be counted on logical processor 0 which is very likely to be at a different IP address. The IP address on logical processor 0 is recorded as the location of the event. If you use TI-E events, be aware of this when reviewing data below the system level.