CPU GHz monitoring using lparstat
nagger 100000MRSJ Visits (10889)
Just came across this good AIX wiki article about monitoring the POWER7 CPU/core frequency changing on the fly and the new lparstat command options ( -Ew). This allows you to see what is happening with your GHz (like pmcycles -M but collected regularly).
Check it out here - CPU Frequency Monitoring using lparstat