TrafficGen.py revision 9241
19241Sandreas.hansson@arm.com# Copyright (c) 2012 ARM Limited 29241Sandreas.hansson@arm.com# All rights reserved. 39241Sandreas.hansson@arm.com# 49241Sandreas.hansson@arm.com# The license below extends only to copyright in the software and shall 59241Sandreas.hansson@arm.com# not be construed as granting a license to any other intellectual 69241Sandreas.hansson@arm.com# property including but not limited to intellectual property relating 79241Sandreas.hansson@arm.com# to a hardware implementation of the functionality of the software 89241Sandreas.hansson@arm.com# licensed hereunder. You may use the software subject to the license 99241Sandreas.hansson@arm.com# terms below provided that you ensure that this notice is replicated 109241Sandreas.hansson@arm.com# unmodified and in its entirety in all distributions of the software, 119241Sandreas.hansson@arm.com# modified or unmodified, in source code or in binary form. 129241Sandreas.hansson@arm.com# 139241Sandreas.hansson@arm.com# Redistribution and use in source and binary forms, with or without 149241Sandreas.hansson@arm.com# modification, are permitted provided that the following conditions are 159241Sandreas.hansson@arm.com# met: redistributions of source code must retain the above copyright 169241Sandreas.hansson@arm.com# notice, this list of conditions and the following disclaimer; 179241Sandreas.hansson@arm.com# redistributions in binary form must reproduce the above copyright 189241Sandreas.hansson@arm.com# notice, this list of conditions and the following disclaimer in the 199241Sandreas.hansson@arm.com# documentation and/or other materials provided with the distribution; 209241Sandreas.hansson@arm.com# neither the name of the copyright holders nor the names of its 219241Sandreas.hansson@arm.com# contributors may be used to endorse or promote products derived from 229241Sandreas.hansson@arm.com# this software without specific prior written permission. 239241Sandreas.hansson@arm.com# 249241Sandreas.hansson@arm.com# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 259241Sandreas.hansson@arm.com# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 269241Sandreas.hansson@arm.com# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 279241Sandreas.hansson@arm.com# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 289241Sandreas.hansson@arm.com# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 299241Sandreas.hansson@arm.com# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 309241Sandreas.hansson@arm.com# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 319241Sandreas.hansson@arm.com# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 329241Sandreas.hansson@arm.com# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 339241Sandreas.hansson@arm.com# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 349241Sandreas.hansson@arm.com# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 359241Sandreas.hansson@arm.com# 369241Sandreas.hansson@arm.com# Authors: Thomas Grass 379241Sandreas.hansson@arm.com# Andreas Hansson 389241Sandreas.hansson@arm.com# Sascha Bischoff 399241Sandreas.hansson@arm.com 409241Sandreas.hansson@arm.comfrom m5.params import * 419241Sandreas.hansson@arm.comfrom m5.proxy import * 429241Sandreas.hansson@arm.comfrom MemObject import MemObject 439241Sandreas.hansson@arm.com 449241Sandreas.hansson@arm.com# The traffic generator is a master module that generates stimuli for 459241Sandreas.hansson@arm.com# the memory system, based on a collection of simple behaviours that 469241Sandreas.hansson@arm.com# are either probabilistic or based on traces. It can be used stand 479241Sandreas.hansson@arm.com# alone for creating test cases for interconnect and memory 489241Sandreas.hansson@arm.com# controllers, or function as a black-box replacement for system 499241Sandreas.hansson@arm.com# components that are not yet modelled in detail, e.g. a video engine 509241Sandreas.hansson@arm.com# or baseband subsystem in an SoC. 519241Sandreas.hansson@arm.com# 529241Sandreas.hansson@arm.com# The traffic generator has a single master port that is used to send 539241Sandreas.hansson@arm.com# requests, independent of the specific behaviour. The behaviour of 549241Sandreas.hansson@arm.com# the traffic generator is specified in a configuration file, and this 559241Sandreas.hansson@arm.com# file describes a state transition graph where each state is a 569241Sandreas.hansson@arm.com# specific generator behaviour. Examples include idling, generating 579241Sandreas.hansson@arm.com# linear address sequences, random sequences and replay of captured 589241Sandreas.hansson@arm.com# traces. By describing these behaviours as states, it is straight 599241Sandreas.hansson@arm.com# forward to create very complex behaviours, simply by arranging them 609241Sandreas.hansson@arm.com# in graphs. The graph transitions can also be annotated with 619241Sandreas.hansson@arm.com# probabilities, effectively making it a Markov Chain. 629241Sandreas.hansson@arm.comclass TrafficGen(MemObject): 639241Sandreas.hansson@arm.com type = 'TrafficGen' 649241Sandreas.hansson@arm.com 659241Sandreas.hansson@arm.com # Port used for sending requests and receiving responses 669241Sandreas.hansson@arm.com port = MasterPort("Master port") 679241Sandreas.hansson@arm.com 689241Sandreas.hansson@arm.com # Config file to parse for the state descriptions 699241Sandreas.hansson@arm.com config_file = Param.String("Configuration file describing the behaviour") 709241Sandreas.hansson@arm.com 719241Sandreas.hansson@arm.com # System used to determine the mode of the memory system 729241Sandreas.hansson@arm.com system = Param.System(Parent.any, "System this generator is part of") 73