While the polling loop is running on a core, the
metric for this core is always close to 100%, regardless of how many loop cycles DPDK spends in an idle state. Therefore, the
metric cannot be used to reliably identify how the core is utilized on packet retrieval. For this polling model, a better utilization indicator might be the
Rx Spin Time
value, which is the ratio of wasted polling loop cycles. Wasted cycles are loop iterations during which DPDK does not receive any packets.