1# Copyright (c) 2012 ARM Limited
2# All rights reserved.
3#
4# The license below extends only to copyright in the software and shall
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35#
36# Authors: Thomas Grass
37#          Andreas Hansson
38
39from m5.params import *
40from m5.proxy import *
41from m5.objects.System import System
42from m5.SimObject import SimObject
43
44# The communication monitor will most typically be used in combination
45# with periodic dumping and resetting of stats using schedStatEvent
46class CommMonitor(SimObject):
47    type = 'CommMonitor'
48    cxx_header = "mem/comm_monitor.hh"
49
50    system = Param.System(Parent.any, "System that the monitor belongs to.")
51
52    # one port in each direction
53    master = MasterPort("Master port")
54    slave = SlavePort("Slave port")
55
56    # control the sample period window length of this monitor
57    sample_period = Param.Clock("1ms", "Sample period for histograms")
58
59    # for each histogram, set the number of bins and enable the user
60    # to disable the measurement, reads and writes use the same
61    # parameters
62
63    # histogram of burst length of packets (not using sample period)
64    burst_length_bins = Param.Unsigned('20', "# bins in burst length " \
65                                           "histograms")
66    disable_burst_length_hists = Param.Bool(False, "Disable burst length " \
67                                                "histograms")
68
69    # bandwidth per sample period
70    bandwidth_bins = Param.Unsigned('20', "# bins in bandwidth histograms")
71    disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
72
73    # latency from request to response (not using sample period)
74    latency_bins = Param.Unsigned('20', "# bins in latency histograms")
75    disable_latency_hists = Param.Bool(False, "Disable latency histograms")
76
77    # inter transaction time (ITT) distributions in uniformly sized
78    # bins up to the maximum, independently for read-to-read,
79    # write-to-write and the combined request-to-request that does not
80    # separate read and write requests
81    itt_bins = Param.Unsigned('20', "# bins in ITT distributions")
82    itt_max_bin = Param.Latency('100ns', "Max bin of ITT distributions")
83    disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
84
85    # outstanding requests (that did not yet get a response) per
86    # sample period
87    outstanding_bins = Param.Unsigned('20', "# bins in outstanding " \
88                                          "requests histograms")
89    disable_outstanding_hists = Param.Bool(False, "Disable outstanding " \
90                                               "requests histograms")
91
92    # transactions (requests) observed per sample period
93    transaction_bins = Param.Unsigned('20', "# bins in transaction " \
94                                          "count histograms")
95    disable_transaction_hists = Param.Bool(False, "Disable transaction count " \
96                                               "histograms")
97
98    # address distributions (heatmaps) with associated address masks
99    # to selectively only look at certain bits of the address
100    read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
101    write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
102    disable_addr_dists = Param.Bool(True, "Disable address distributions")
103