BaseTrafficGen.py revision 12810 
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35#
36# Authors: Thomas Grass
37#          Andreas Hansson
38#          Sascha Bischoff
39
40from m5.params import *
41from m5.proxy import *
42from MemObject import MemObject
43
44# The traffic generator is a master module that generates stimuli for
45# the memory system, based on a collection of simple behaviours that
46# are either probabilistic or based on traces. It can be used stand
47# alone for creating test cases for interconnect and memory
48# controllers, or function as a black-box replacement for system
49# components that are not yet modelled in detail, e.g. a video engine
50# or baseband subsystem in an SoC.
51class BaseTrafficGen(MemObject):
52    type = 'BaseTrafficGen'
53    abstract = True
54    cxx_header = "cpu/testers/traffic_gen/traffic_gen.hh"
55
56    # Port used for sending requests and receiving responses
57    port = MasterPort("Master port")
58
59    # System used to determine the mode of the memory system
60    system = Param.System(Parent.any, "System this generator is part of")
61
62    # Should requests respond to back-pressure or not, if true, the
63    # rate of the traffic generator will be slowed down if requests
64    # are not immediately accepted
65    elastic_req = Param.Bool(False,
66                             "Slow down requests in case of backpressure")
67
68    # Let the user know if we have waited for a retry and not made any
69    # progress for a long period of time. The default value is
70    # somewhat arbitrary and may well have to be tuned.
71    progress_check = Param.Latency('1ms', "Time before exiting " \
72                                   "due to lack of progress")
73