Intel ARCHITECTURE IA-32 - Manual (Page 502)

IA-32 Intel® Architecture Optimization
B-48
Tags for front_end_event
Table B-3 provides a list of the tags that are used by various metrics
derived from the
front_end_event . The event names referenced in
column 2 can be found from the Pentium 4 processor performance
monitoring events.
Tags for execution_event
Table B-4 provides a list of the tags that are used by various metrics
derived from the
execution_event . These tags require programming
an upstream ESCR to select event mask with its TagUop and TagValue
bit fields. The event mask for the downstream ESCR is specified in
column 4. The event names referenced in column 4 can be found in the
Pentium 4 processor performance monitoring events.
Table B-3 Table 3 Metrics That Utilize the Front-end Tagging Mechanism
Front-end MetricTags 1
1. There may be some undercounting of front end events when there is an overflow or underflow of the floating point
stack.
Additional MSR
See Event Mask Parameter for
Front_end_event
Memory_loads Set the TAGLOADS bit in
Uop_Type
NBOGUS
Memory_stores Set the TAGSTORES bit in
Uop_Type NBOGUS