cpu_cycles        569 arch/arm/kernel/perf_event_v7.c ARMV7_EVENT_ATTR(cpu_cycles, ARMV7_PERFCTR_CLOCK_CYCLES);
cpu_cycles        182 arch/arm64/kernel/perf_event.c ARMV8_EVENT_ATTR(cpu_cycles, ARMV8_PMUV3_PERFCTR_CPU_CYCLES);