PERF_COUNT_HW_CPU_CYCLES               0
PERF_COUNT_HW_INSTRUCTIONS             1
PERF_COUNT_HW_CACHE_REFERENCES         2
PERF_COUNT_HW_CACHE_MISSES             3
PERF_COUNT_HW_BRANCH_INSTRUCTIONS      4
PERF_COUNT_HW_BRANCH_MISSES            5
PERF_COUNT_HW_BUS_CYCLES               6
PERF_COUNT_HW_STALLED_CYCLES_FRONTEND  7
PERF_COUNT_HW_STALLED_CYCLES_BACKEND   8
PERF_COUNT_HW_REF_CPU_CYCLES           9
#unterminated