CommMonitor.py revision 8981:6f4ec692716f 
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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
47    # one port in each direction
48    master = MasterPort("Master port")
49    slave = SlavePort("Slave port")
50
51    # control the sample period window length of this monitor
52    sample_period = Param.Clock("1ms", "Sample period for histograms")
53
54    # for each histogram, set the number of bins and enable the user
55    # to disable the measurement, reads and writes use the same
56    # parameters
57
58    # histogram of burst length of packets (not using sample period)
59    burst_length_bins = Param.Unsigned('20', "# bins in burst length " \
60                                           "histograms")
61    disable_burst_length_hists = Param.Bool(False, "Disable burst length " \
62                                                "histograms")
63
64    # bandwidth per sample period
65    bandwidth_bins = Param.Unsigned('20', "# bins in bandwidth histograms")
66    disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
67
68    # latency from request to response (not using sample period)
69    latency_bins = Param.Unsigned('20', "# bins in latency histograms")
70    disable_latency_hists = Param.Bool(False, "Disable latency histograms")
71
72    # inter transaction time (ITT) distributions in uniformly sized
73    # bins up to the maximum, independently for read-to-read,
74    # write-to-write and the combined request-to-request that does not
75    # separate read and write requests
76    itt_bins = Param.Unsigned('20', "# bins in ITT distributions")
77    itt_max_bin = Param.Latency('100ns', "Max bin of ITT distributions")
78    disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
79
80    # outstanding requests (that did not yet get a response) per
81    # sample period
82    outstanding_bins = Param.Unsigned('20', "# bins in outstanding " \
83                                          "requests histograms")
84    disable_outstanding_hists = Param.Bool(False, "Disable outstanding " \
85                                               "requests histograms")
86
87    # transactions (requests) observed per sample period
88    transaction_bins = Param.Unsigned('20', "# bins in transaction " \
89                                          "count histograms")
90    disable_transaction_hists = Param.Bool(False, "Disable transaction count " \
91                                               "histograms")
92
93    # address distributions (heatmaps) with associated address masks
94    # to selectively only look at certain bits of the address
95    read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
96    write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
97    disable_addr_dists = Param.Bool(True, "Disable address distributions")
98