src/mem/CommMonitor.py

   1 # Copyright (c) 2012 ARM Limited
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  35
  36 from m5.params import *
  37 from m5.proxy import *
  38 from m5.objects.System import System
  39 from m5.SimObject import SimObject
  40
  41 # The communication monitor will most typically be used in combination
  42 # with periodic dumping and resetting of stats using schedStatEvent
  43 class CommMonitor(SimObject):
  44     type = 'CommMonitor'
  45     cxx_header = "mem/comm_monitor.hh"
  46
  47     system = Param.System(Parent.any, "System that the monitor belongs to.")
  48
  49     # one port in each direction
  50     master = MasterPort("Master port")
  51     slave = SlavePort("Slave port")
  52
  53     # control the sample period window length of this monitor
  54     sample_period = Param.Clock("1ms", "Sample period for histograms")
  55
  56     # for each histogram, set the number of bins and enable the user
  57     # to disable the measurement, reads and writes use the same
  58     # parameters
  59
  60     # histogram of burst length of packets (not using sample period)
  61     burst_length_bins = Param.Unsigned('20', "# bins in burst length " \
  62                                            "histograms")
  63     disable_burst_length_hists = Param.Bool(False, "Disable burst length " \
  64                                                 "histograms")
  65
  66     # bandwidth per sample period
  67     bandwidth_bins = Param.Unsigned('20', "# bins in bandwidth histograms")
  68     disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
  69
  70     # latency from request to response (not using sample period)
  71     latency_bins = Param.Unsigned('20', "# bins in latency histograms")
  72     disable_latency_hists = Param.Bool(False, "Disable latency histograms")
  73
  74     # inter transaction time (ITT) distributions in uniformly sized
  75     # bins up to the maximum, independently for read-to-read,
  76     # write-to-write and the combined request-to-request that does not
  77     # separate read and write requests
  78     itt_bins = Param.Unsigned('20', "# bins in ITT distributions")
  79     itt_max_bin = Param.Latency('100ns', "Max bin of ITT distributions")
  80     disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
  81
  82     # outstanding requests (that did not yet get a response) per
  83     # sample period
  84     outstanding_bins = Param.Unsigned('20', "# bins in outstanding " \
  85                                           "requests histograms")
  86     disable_outstanding_hists = Param.Bool(False, "Disable outstanding " \
  87                                                "requests histograms")
  88
  89     # transactions (requests) observed per sample period
  90     transaction_bins = Param.Unsigned('20', "# bins in transaction " \
  91                                           "count histograms")
  92     disable_transaction_hists = Param.Bool(False, "Disable transaction count " \
  93                                                "histograms")
  94
  95     # address distributions (heatmaps) with associated address masks
  96     # to selectively only look at certain bits of the address
  97     read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
  98     write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
  99     disable_addr_dists = Param.Bool(True, "Disable address distributions")