ruby_mem_test.py revision 9120:48eeef8a0997
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') 38addToPath('../topologies') 39 40import Options 41import Ruby 42 43# Get paths we might need. It's expected this file is in m5/configs/example. 44config_path = os.path.dirname(os.path.abspath(__file__)) 45config_root = os.path.dirname(config_path) 46m5_root = os.path.dirname(config_root) 47 48parser = optparse.OptionParser() 49Options.addCommonOptions(parser) 50 51parser.add_option("-l", "--maxloads", metavar="N", default=0, 52 help="Stop after N loads") 53parser.add_option("--progress", type="int", default=1000, 54 metavar="NLOADS", 55 help="Progress message interval " 56 "[default: %default]") 57parser.add_option("--num-dmas", type="int", default=0, help="# of dma testers") 58parser.add_option("--functional", type="int", default=0, 59 help="percentage of accesses that should be functional") 60parser.add_option("--suppress-func-warnings", action="store_true", 61 help="suppress warnings when functional accesses fail") 62 63# 64# Add the ruby specific and protocol specific options 65# 66Ruby.define_options(parser) 67 68execfile(os.path.join(config_root, "common", "Options.py")) 69 70(options, args) = parser.parse_args() 71 72# 73# Set the default cache size and associativity to be very small to encourage 74# races between requests and writebacks. 75# 76options.l1d_size="256B" 77options.l1i_size="256B" 78options.l2_size="512B" 79options.l3_size="1kB" 80options.l1d_assoc=2 81options.l1i_assoc=2 82options.l2_assoc=2 83options.l3_assoc=2 84 85if args: 86 print "Error: script doesn't take any positional arguments" 87 sys.exit(1) 88 89block_size = 64 90 91if options.num_cpus > block_size: 92 print "Error: Number of testers %d limited to %d because of false sharing" \ 93 % (options.num_cpus, block_size) 94 sys.exit(1) 95 96# 97# Currently ruby does not support atomic or uncacheable accesses 98# 99cpus = [ MemTest(atomic = False, 100 max_loads = options.maxloads, 101 issue_dmas = False, 102 percent_functional = options.functional, 103 percent_uncacheable = 0, 104 progress_interval = options.progress, 105 suppress_func_warnings = options.suppress_func_warnings) \ 106 for i in xrange(options.num_cpus) ] 107 108system = System(cpu = cpus, 109 funcmem = SimpleMemory(in_addr_map = False), 110 funcbus = NoncoherentBus(), 111 physmem = SimpleMemory()) 112 113if options.num_dmas > 0: 114 dmas = [ MemTest(atomic = False, 115 max_loads = options.maxloads, 116 issue_dmas = True, 117 percent_functional = 0, 118 percent_uncacheable = 0, 119 progress_interval = options.progress, 120 suppress_func_warnings = 121 not options.suppress_func_warnings) \ 122 for i in xrange(options.num_dmas) ] 123 system.dma_devices = dmas 124else: 125 dmas = [] 126 127dma_ports = [] 128for (i, dma) in enumerate(dmas): 129 dma_ports.append(dma.test) 130Ruby.create_system(options, system, dma_ports = dma_ports) 131 132# 133# The tester is most effective when randomization is turned on and 134# artifical delay is randomly inserted on messages 135# 136system.ruby.randomization = True 137 138assert(len(cpus) == len(system.ruby._cpu_ruby_ports)) 139 140for (i, cpu) in enumerate(cpus): 141 # 142 # Tie the cpu memtester ports to the correct system ports 143 # 144 cpu.test = system.ruby._cpu_ruby_ports[i].slave 145 cpu.functional = system.funcbus.slave 146 147 # 148 # Since the memtester is incredibly bursty, increase the deadlock 149 # threshold to 5 million cycles 150 # 151 system.ruby._cpu_ruby_ports[i].deadlock_threshold = 5000000 152 153 # 154 # Ruby doesn't need the backing image of memory when running with 155 # the tester. 156 # 157 system.ruby._cpu_ruby_ports[i].access_phys_mem = False 158 159for (i, dma) in enumerate(dmas): 160 # 161 # Tie the dma memtester ports to the correct functional port 162 # Note that the test port has already been connected to the dma_sequencer 163 # 164 dma.functional = system.funcbus.slave 165 166# connect reference memory to funcbus 167system.funcbus.master = system.funcmem.port 168 169# ----------------------- 170# run simulation 171# ----------------------- 172 173root = Root( full_system = False, system = system ) 174root.system.mem_mode = 'timing' 175 176# Not much point in this being higher than the L1 latency 177m5.ticks.setGlobalFrequency('1ns') 178 179# instantiate configuration 180m5.instantiate() 181 182# simulate until program terminates 183exit_event = m5.simulate(options.maxtick) 184 185print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() 186