src/cpu/trace/TraceCPU.py

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  35
  36 from m5.params import *
  37 from m5.objects.BaseCPU import BaseCPU
  38
  39 class TraceCPU(BaseCPU):
  40     """Trace CPU model which replays traces generated in a prior simulation
  41      using DerivO3CPU or its derived classes. It interfaces with L1 caches.
  42     """
  43     type = 'TraceCPU'
  44     cxx_header = "cpu/trace/trace_cpu.hh"
  45
  46     @classmethod
  47     def memory_mode(cls):
  48         return 'timing'
  49
  50     @classmethod
  51     def require_caches(cls):
  52         return True
  53
  54     def addPMU(self, pmu = None):
  55         pass
  56
  57     @classmethod
  58     def support_take_over(cls):
  59         return True
  60
  61     instTraceFile = Param.String("", "Instruction trace file")
  62     dataTraceFile = Param.String("", "Data dependency trace file")
  63     sizeStoreBuffer = Param.Unsigned(16, "Number of entries in the store "\
  64         "buffer")
  65     sizeLoadBuffer = Param.Unsigned(16, "Number of entries in the load buffer")
  66     sizeROB =  Param.Unsigned(40, "Number of entries in the re-order buffer")
  67
  68     # Frequency multiplier used to effectively scale the Trace CPU frequency
  69     # either up or down. Note that the Trace CPU's clock domain must also be
  70     # changed when frequency is scaled. A default value of 1.0 means the same
  71     # frequency as was used for generating the traces.
  72     freqMultiplier = Param.Float(1.0, "Multiplier scale the Trace CPU "\
  73                                  "frequency up or down")
  74
  75     # Enable exiting when any one Trace CPU completes execution which is set to
  76     # false by default
  77     enableEarlyExit = Param.Bool(False, "Exit when any one Trace CPU "\
  78                                  "completes execution")
  79
  80     # If progress msg interval is set to a non-zero value, it is treated as
  81     # the interval of committed instructions at which an info message is
  82     # printed.
  83     progressMsgInterval = Param.Unsigned(0, "Interval of committed "\
  84                                          "instructions at which to print a"\
  85                                          " progress msg")