ruby_mem_test.py revision 8928:051bc173ea72
1# Copyright (c) 2006-2007 The Regents of The University of Michigan 2# Copyright (c) 2009 Advanced Micro Devices, Inc. 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer; 9# redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution; 12# neither the name of the copyright holders nor the names of its 13# contributors may be used to endorse or promote products derived from 14# this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27# 28# Authors: Ron Dreslinski 29# Brad Beckmann 30 31import m5 32from m5.objects import * 33from m5.defines import buildEnv 34from m5.util import addToPath 35import os, optparse, sys 36addToPath('../common') 37addToPath('../ruby') 38 39import Options 40import Ruby 41 42# Get paths we might need. It's expected this file is in m5/configs/example. 43config_path = os.path.dirname(os.path.abspath(__file__)) 44config_root = os.path.dirname(config_path) 45m5_root = os.path.dirname(config_root) 46 47parser = optparse.OptionParser() 48Options.addCommonOptions(parser) 49 50parser.add_option("-l", "--maxloads", metavar="N", default=0, 51 help="Stop after N loads") 52parser.add_option("--progress", type="int", default=1000, 53 metavar="NLOADS", 54 help="Progress message interval " 55 "[default: %default]") 56parser.add_option("--num-dmas", type="int", default=0, help="# of dma testers") 57parser.add_option("--functional", type="int", default=0, 58 help="percentage of accesses that should be functional") 59parser.add_option("--suppress-func-warnings", action="store_true", 60 help="suppress warnings when functional accesses fail") 61 62# 63# Add the ruby specific and protocol specific options 64# 65Ruby.define_options(parser) 66 67execfile(os.path.join(config_root, "common", "Options.py")) 68 69(options, args) = parser.parse_args() 70 71# 72# Set the default cache size and associativity to be very small to encourage 73# races between requests and writebacks. 74# 75options.l1d_size="256B" 76options.l1i_size="256B" 77options.l2_size="512B" 78options.l3_size="1kB" 79options.l1d_assoc=2 80options.l1i_assoc=2 81options.l2_assoc=2 82options.l3_assoc=2 83 84if args: 85 print "Error: script doesn't take any positional arguments" 86 sys.exit(1) 87 88block_size = 64 89 90if options.num_cpus > block_size: 91 print "Error: Number of testers %d limited to %d because of false sharing" \ 92 % (options.num_cpus, block_size) 93 sys.exit(1) 94 95# 96# Currently ruby does not support atomic or uncacheable accesses 97# 98cpus = [ MemTest(atomic = False, 99 max_loads = options.maxloads, 100 issue_dmas = False, 101 percent_functional = options.functional, 102 percent_uncacheable = 0, 103 progress_interval = options.progress, 104 suppress_func_warnings = options.suppress_func_warnings) \ 105 for i in xrange(options.num_cpus) ] 106 107system = System(cpu = cpus, 108 funcmem = PhysicalMemory(), 109 physmem = PhysicalMemory()) 110 111if options.num_dmas > 0: 112 dmas = [ MemTest(atomic = False, 113 max_loads = options.maxloads, 114 issue_dmas = True, 115 percent_functional = 0, 116 percent_uncacheable = 0, 117 progress_interval = options.progress, 118 warn_on_failure = options.warn_on_failure) \ 119 for i in xrange(options.num_dmas) ] 120 system.dma_devices = dmas 121else: 122 dmas = [] 123 124Ruby.create_system(options, system, dma_devices = dmas) 125 126# 127# The tester is most effective when randomization is turned on and 128# artifical delay is randomly inserted on messages 129# 130system.ruby.randomization = True 131 132assert(len(cpus) == len(system.ruby._cpu_ruby_ports)) 133 134for (i, cpu) in enumerate(cpus): 135 # 136 # Tie the cpu memtester ports to the correct system ports 137 # 138 cpu.test = system.ruby._cpu_ruby_ports[i].slave 139 cpu.functional = system.funcmem.port 140 141 # 142 # Since the memtester is incredibly bursty, increase the deadlock 143 # threshold to 5 million cycles 144 # 145 system.ruby._cpu_ruby_ports[i].deadlock_threshold = 5000000 146 147 # 148 # Ruby doesn't need the backing image of memory when running with 149 # the tester. 150 # 151 system.ruby._cpu_ruby_ports[i].access_phys_mem = False 152 153for (i, dma) in enumerate(dmas): 154 # 155 # Tie the dma memtester ports to the correct functional port 156 # Note that the test port has already been connected to the dma_sequencer 157 # 158 dma.functional = system.funcmem.port 159 160# ----------------------- 161# run simulation 162# ----------------------- 163 164root = Root( full_system = False, system = system ) 165root.system.mem_mode = 'timing' 166 167# Not much point in this being higher than the L1 latency 168m5.ticks.setGlobalFrequency('1ns') 169 170# instantiate configuration 171m5.instantiate() 172 173# simulate until program terminates 174exit_event = m5.simulate(options.maxtick) 175 176print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() 177