how to use metrics with perf stat

perf list shows a bunch of what it calls metrics. The list starts off with List of pre-defined events (to be used in -e): Metrics: BAClear_Cost [Average Branch Address Clear Cost (fraction of cycles)] C2_Pkg_Residency [C2 residency percent per package] C3_Core_Residency [C3 residency percent per core] C3_Pkg_Residency [C3 residency percent per package] I'd like to experiment with these but I can't get perf stat to use them. Since the first line says "(to be used in -e)", I tried the following, but it produces an error 103> perf stat -e IPL sleep 10 event syntax error: 'IPL' \___ parser error Then I found some examples on the internet using -M, but this doesn't work either. 103 > perf stat -M IPL sleep 10 Cannot find metric or group `IPL' Usage: perf stat [] [] -M, --metrics monitor specified metrics or metric groups (separated by ,) Can someone explain how to get perf to use these metrics? Thanks.