Metrics Reference - Profiler CUDA

Hi, I wonder about the metric low-level CUDA profile.

For example, the metric sm_eficciency(Multiprocessor Activity), could collect data from it and it is 92%, how can I assess whether it is good value? There is a benchmark to evaluate it?

There are several of these metrics in: (Topic 9 - Metrics Reference)

Is there any place that has an evaluation of these metrics?

Thanks in advance.