CommMonitor.py revision 10995:a114e2712642 
1# Copyright (c) 2012 ARM Limited
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35#
36# Authors: Thomas Grass
37#          Andreas Hansson
38
39from m5.params import *
40from m5.proxy import *
41from MemObject import MemObject
42from System import System
43
44# The communication monitor will most typically be used in combination
45# with periodic dumping and resetting of stats using schedStatEvent
46class CommMonitor(MemObject):
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    # Boolean to enable or disable the trace. Writes to an a file named based on
57    # SimObject hierarchy.
58    trace_enable = Param.Bool(False, "Enable trace capture")
59
60    # Boolean to compress the trace or not.
61    trace_compress = Param.Bool(True, "Enable trace compression")
62
63    # packet trace output file, disabled by default
64    trace_file = Param.String("", "Packet trace output file")
65
66    # control the sample period window length of this monitor
67    sample_period = Param.Clock("1ms", "Sample period for histograms")
68
69    # for each histogram, set the number of bins and enable the user
70    # to disable the measurement, reads and writes use the same
71    # parameters
72
73    # histogram of burst length of packets (not using sample period)
74    burst_length_bins = Param.Unsigned('20', "# bins in burst length " \
75                                           "histograms")
76    disable_burst_length_hists = Param.Bool(False, "Disable burst length " \
77                                                "histograms")
78
79    # bandwidth per sample period
80    bandwidth_bins = Param.Unsigned('20', "# bins in bandwidth histograms")
81    disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
82
83    # latency from request to response (not using sample period)
84    latency_bins = Param.Unsigned('20', "# bins in latency histograms")
85    disable_latency_hists = Param.Bool(False, "Disable latency histograms")
86
87    # inter transaction time (ITT) distributions in uniformly sized
88    # bins up to the maximum, independently for read-to-read,
89    # write-to-write and the combined request-to-request that does not
90    # separate read and write requests
91    itt_bins = Param.Unsigned('20', "# bins in ITT distributions")
92    itt_max_bin = Param.Latency('100ns', "Max bin of ITT distributions")
93    disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
94
95    # outstanding requests (that did not yet get a response) per
96    # sample period
97    outstanding_bins = Param.Unsigned('20', "# bins in outstanding " \
98                                          "requests histograms")
99    disable_outstanding_hists = Param.Bool(False, "Disable outstanding " \
100                                               "requests histograms")
101
102    # transactions (requests) observed per sample period
103    transaction_bins = Param.Unsigned('20', "# bins in transaction " \
104                                          "count histograms")
105    disable_transaction_hists = Param.Bool(False, "Disable transaction count " \
106                                               "histograms")
107
108    # address distributions (heatmaps) with associated address masks
109    # to selectively only look at certain bits of the address
110    read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
111    write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
112    disable_addr_dists = Param.Bool(True, "Disable address distributions")
113