TITLE: Front End Bandwidth Limited Due To Supply Out Of The DSB
Cycles the front end was bound on bandwidth supply out of DSB
When the front end cannot deliver enough uops when the back end is requesting uops, this can potentially indicate a front end limitation which is affecting performance. With this metric, the limited bandwidth is due to limitations in the DSB being unable to supply 4 uops in a particular cycle. Recommendation is to look into the other DSB metrics to root cause the issue.
EQUATION: (IDQ.ALL_DSB_CYCLES_ANY_UOPS-IDQ.ALL_DSB_CYCLES_4_UOPS) / CPU_CLK_UNHALTED.THREAD