TITLE: Uops from the legacy decode pipeline
This metric describes the percentage of uops delivered to the micro-op queue that came from the MITE, which is the legacy decode pipeline.
If your application is not bound in the front end then whether micro-ops are coming from the legacy decode pipeline or Decoded ICache is of lesser importance. If you are front end bound and UopSource_MITE is greater than ~30%, you may want to look into the following:
1) Investigate why micro-ops are not coming from the Decoded ICache (DSB)
2) Investigate issues which can impact the legacy decode pipeline (e.g. LCP stalls)
EQUATION: IDQ.MITE_UOPS / (IDQ.MITE_UOPS + IDQ.DSB_UOPS + IDQ.MS_UOPS)