CommMonitor.py revision 9338:97b4a2be1e5b 
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35#
36# Authors: Thomas Grass
37#          Andreas Hansson
38
39from m5.params import *
40from MemObject import MemObject
41
42# The communication monitor will most typically be used in combination
43# with periodic dumping and resetting of stats using schedStatEvent
44class CommMonitor(MemObject):
45    type = 'CommMonitor'
46    cxx_header = "mem/comm_monitor.hh"
47
48    # one port in each direction
49    master = MasterPort("Master port")
50    slave = SlavePort("Slave port")
51
52    # control the sample period window length of this monitor
53    sample_period = Param.Clock("1ms", "Sample period for histograms")
54
55    # for each histogram, set the number of bins and enable the user
56    # to disable the measurement, reads and writes use the same
57    # parameters
58
59    # histogram of burst length of packets (not using sample period)
60    burst_length_bins = Param.Unsigned('20', "# bins in burst length " \
61                                           "histograms")
62    disable_burst_length_hists = Param.Bool(False, "Disable burst length " \
63                                                "histograms")
64
65    # bandwidth per sample period
66    bandwidth_bins = Param.Unsigned('20', "# bins in bandwidth histograms")
67    disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
68
69    # latency from request to response (not using sample period)
70    latency_bins = Param.Unsigned('20', "# bins in latency histograms")
71    disable_latency_hists = Param.Bool(False, "Disable latency histograms")
72
73    # inter transaction time (ITT) distributions in uniformly sized
74    # bins up to the maximum, independently for read-to-read,
75    # write-to-write and the combined request-to-request that does not
76    # separate read and write requests
77    itt_bins = Param.Unsigned('20', "# bins in ITT distributions")
78    itt_max_bin = Param.Latency('100ns', "Max bin of ITT distributions")
79    disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
80
81    # outstanding requests (that did not yet get a response) per
82    # sample period
83    outstanding_bins = Param.Unsigned('20', "# bins in outstanding " \
84                                          "requests histograms")
85    disable_outstanding_hists = Param.Bool(False, "Disable outstanding " \
86                                               "requests histograms")
87
88    # transactions (requests) observed per sample period
89    transaction_bins = Param.Unsigned('20', "# bins in transaction " \
90                                          "count histograms")
91    disable_transaction_hists = Param.Bool(False, "Disable transaction count " \
92                                               "histograms")
93
94    # address distributions (heatmaps) with associated address masks
95    # to selectively only look at certain bits of the address
96    read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
97    write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
98    disable_addr_dists = Param.Bool(True, "Disable address distributions")
99