configs/common/CpuConfig.py

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  35
  36 from __future__ import print_function
  37 from __future__ import absolute_import
  38
  39 from m5 import fatal
  40 import m5.objects
  41
  42 def config_etrace(cpu_cls, cpu_list, options):
  43     if issubclass(cpu_cls, m5.objects.DerivO3CPU):
  44         # Assign the same file name to all cpus for now. This must be
  45         # revisited when creating elastic traces for multi processor systems.
  46         for cpu in cpu_list:
  47             # Attach the elastic trace probe listener. Set the protobuf trace
  48             # file names. Set the dependency window size equal to the cpu it
  49             # is attached to.
  50             cpu.traceListener = m5.objects.ElasticTrace(
  51                                 instFetchTraceFile = options.inst_trace_file,
  52                                 dataDepTraceFile = options.data_trace_file,
  53                                 depWindowSize = 3 * cpu.numROBEntries)
  54             # Make the number of entries in the ROB, LQ and SQ very
  55             # large so that there are no stalls due to resource
  56             # limitation as such stalls will get captured in the trace
  57             # as compute delay. For replay, ROB, LQ and SQ sizes are
  58             # modelled in the Trace CPU.
  59             cpu.numROBEntries = 512;
  60             cpu.LQEntries = 128;
  61             cpu.SQEntries = 128;
  62     else:
  63         fatal("%s does not support data dependency tracing. Use a CPU model of"
  64               " type or inherited from DerivO3CPU.", cpu_cls)