Starting the counters in a non-threaded region: hpmStart

To start the counters outside a threaded region, use the command:

  f_hpmstart(instid, label)
  hpmStart(instid, label)

• instid has to be set to a unique number, identifying each instrumented section. instid has to be positive and can be as large as 100. However the maximum possible value of instid can be changed with the environment variable HPM_NUM_INST_PTS.
• label has to be set to a string. The label will be included into the output files to assist in matching the results to the correct code section.

Instrumented sections can be nested. An instrumented section can be entered several times during code execution. This will restart the counting. Placing instrumentation inside a loop is a typical example for restarting. If a set of counters is restarted the counters will be added to. See here for an example code with nested and restarted instrumented sections.