nominal_freq = 1.0 class Frequency: name = "Frequency" desc = " Frequency in Ghz" subplot = "Frequency" domain = "CoreMetric" def compute(self, EV): try: self.val = (EV("cycles", 1) / EV("CPU_CLK_UNHALTED.REF_TSC", 1)) * nominal_freq except ZeroDivisionError: self.val = 0 class SetupCPU: def __init__(self, r, cpu): global nominal_freq if cpu.freq: nominal_freq = cpu.freq r.metric(Frequency())