The Event Counters

• The MIPS R1x000 cpu has on-chip event counters that are used to monitor processor activity
  • there are 2 counters in R10000 processor
  • each counter has a selector for the events to be counted:
    • events 0 - 15
    • events 16 - 31
  • see man r10k_counters(5) for a complete description
• the R1x000 software counters are available through:
  • the IRIX perfex command
  • the profiling environment
  • a procedural interface (Fortran and C)

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