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Performance tools and metrics

Performance counters

Partly based on messages from Orian in the chat:

  • Check which ones are available through PAPI: papi_avail.

  • Any L3 events are disabled as they are "uncore" events so that there is a security risk as they have to do with shared resources. Uncore events require /proc/sys/kernel/perf_event_paranoid value to be set to 0 or -1 which is not the case on LUMI.

  • There is a difference between counters on zen2 and zen3, so checking on the login nodes does not show what you can use on the LUMI-C and LUMI-G compute nodes...