Uop-Tagging mechanism

Uop-Tagging mechanism

As stated in the Intel manuals,
The Pentium 4 and Intel Xeon processors performance monitoring facilities support the three usage models -

1 : "Event Couting",

2: "Non-precise event-based sampling",

3: "Precise event-based sampling (PEBS)"

I Would like to know if the Uop-tagging mechanism for "At-retirement events" (front-end tagging, execution tagging and replay tagging)exists only for the latter 2 usage models ? Does it exist for the "Event Counting" Usage model ?

Thanks,

Regards,
Mithun Shanbhag,
Syracuse University.

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