TrafficGen.py revision 9241:6cfb9a7acb1b
1# Copyright (c) 2012 ARM Limited 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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. 51# 52# The traffic generator has a single master port that is used to send 53# requests, independent of the specific behaviour. The behaviour of 54# the traffic generator is specified in a configuration file, and this 55# file describes a state transition graph where each state is a 56# specific generator behaviour. Examples include idling, generating 57# linear address sequences, random sequences and replay of captured 58# traces. By describing these behaviours as states, it is straight 59# forward to create very complex behaviours, simply by arranging them 60# in graphs. The graph transitions can also be annotated with 61# probabilities, effectively making it a Markov Chain. 62class TrafficGen(MemObject): 63 type = 'TrafficGen' 64 65 # Port used for sending requests and receiving responses 66 port = MasterPort("Master port") 67 68 # Config file to parse for the state descriptions 69 config_file = Param.String("Configuration file describing the behaviour") 70 71 # System used to determine the mode of the memory system 72 system = Param.System(Parent.any, "System this generator is part of") 73