CommMonitor.py revision 9398 
1# Copyright (c) 2012 ARM Limited
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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    # packet trace output file, disabled by default
53    trace_file = Param.String("", "Packet trace output file")
54
55    # control the sample period window length of this monitor
56    sample_period = Param.Clock("1ms", "Sample period for histograms")
57
58    # for each histogram, set the number of bins and enable the user
59    # to disable the measurement, reads and writes use the same
60    # parameters
61
62    # histogram of burst length of packets (not using sample period)
63    burst_length_bins = Param.Unsigned('20', "# bins in burst length " \
64                                           "histograms")
65    disable_burst_length_hists = Param.Bool(False, "Disable burst length " \
66                                                "histograms")
67
68    # bandwidth per sample period
69    bandwidth_bins = Param.Unsigned('20', "# bins in bandwidth histograms")
70    disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
71
72    # latency from request to response (not using sample period)
73    latency_bins = Param.Unsigned('20', "# bins in latency histograms")
74    disable_latency_hists = Param.Bool(False, "Disable latency histograms")
75
76    # inter transaction time (ITT) distributions in uniformly sized
77    # bins up to the maximum, independently for read-to-read,
78    # write-to-write and the combined request-to-request that does not
79    # separate read and write requests
80    itt_bins = Param.Unsigned('20', "# bins in ITT distributions")
81    itt_max_bin = Param.Latency('100ns', "Max bin of ITT distributions")
82    disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
83
84    # outstanding requests (that did not yet get a response) per
85    # sample period
86    outstanding_bins = Param.Unsigned('20', "# bins in outstanding " \
87                                          "requests histograms")
88    disable_outstanding_hists = Param.Bool(False, "Disable outstanding " \
89                                               "requests histograms")
90
91    # transactions (requests) observed per sample period
92    transaction_bins = Param.Unsigned('20', "# bins in transaction " \
93                                          "count histograms")
94    disable_transaction_hists = Param.Bool(False, "Disable transaction count " \
95                                               "histograms")
96
97    # address distributions (heatmaps) with associated address masks
98    # to selectively only look at certain bits of the address
99    read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
100    write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
101    disable_addr_dists = Param.Bool(True, "Disable address distributions")
102