インテル® VTune™ Amplifier 2018 ヘルプ
This metric represents a fraction of cycles with no uOps executed by the CPU on any execution port. Long-latency instructions like divides may contribute to this metric.
CPU executed no uOps on any execution port during a significant fraction of cycles. Long-latency instructions like divides may contribute to this issue. Check the Assembly view and Appendix C in the Optimization Guide to identify instructions with 5 or more cycles latency.