Changing the event set, option -g

For a power 4 system such as HPCx the event counters are grouped into 61 different event sets. The -g option allows you to select the event set. The example below selects event set number 5

  poe /usr/local/packages/actc/hpmtk/pwr4/bin/hpmcount -g 5 parallel_prog.x

The -g takes a single integer between 0 and 60 as an argument. The default event set is 60, which will be used if -g is not specified. Luiz DeRose considers the event sets 5, 53, 58, 59 and 60 as particularly useful. We describe these five sets here. Use HPMCOUNT's -l option to enquire about the remaining event sets.