Intel® 64 and IA-32 Architectures Optimization Reference Manual

USING PERFORMANCE MONITORING EVENTSB.3.2Tags for front_end_eventTable B-9 provides a list of the tags that are used by various metrics derived from thefront_end_event. The event names referenced in column 2 can be found from thePentium 4 processor performance monitoring events.Table B-9. Metrics That Utilize the Front-end Tagging MechanismFront-end MetricTags 1Memory_loadsMemory_storesAdditional MSRSet the TAGLOADS bit inUop_TypeSet the TAGSTORES bit inUop_TypeSee Event Mask Parameterfor Front_end_eventNBOGUSNBOGUSNOTES:1. May be some undercounting of front end events when there is an overflow or underflow of thefloating point stack.B.3.3Tags for execution_eventTable B-10 provides a list of the tags that are used by various metrics derived fromthe execution_event. These tags require programming an upstream ESCR to selectevent mask with its TagUop and TagValue bit fields. The event mask for the downstreamESCR is specified in column 4. The event names referenced in column 4 canbe found in the Pentium 4 processor performance monitoring events.Table B-10. Metrics That Utilize the Execution Tagging MechanismExecution Metric TagsPacked_SP_retiredScalar_SP_retiredUpstream ESCRSet the ALL bit inthe event maskand the TagUop bitin the ESCR ofpacked_SP_uop.Set the ALL bit inthe event maskand the TagUop bitin the ESCR ofscalar_SP_uop.Tag Value inUpstream ESCRSee Event MaskParameter forExecution_event1 NBOGUS01 NBOGUS0B-37