This event is logical processor 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 events, be aware of this when reviewing data below the system level.
Thread Independent due to ESCR Restriction (TI-E)