TITLE: Front End Latency
Cycles that 0 uops were delivered from the front end when asked to deliver.
When the back end is requesting uops and the front end cannot deliver them, this can indicate a front end limitation which is affecting performance. Looking at the uop source and other Frontend metrics such as Frontend^FE_latency^L1IorTLB and Frontend^FE_latency^DSBtoMITE to determine why 0 uops were delivered.
EQUATION: IDQ_UOPS_NOT_DELIVERED.CYCLES_0_UOPS_DELIV.CORE / CPU_CLK_UNHALTED.THREAD