ruby_mem_test.py revision 7938
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 Ruby 40 41if buildEnv['FULL_SYSTEM']: 42 panic("This script requires system-emulation mode (*_SE).") 43 44# Get paths we might need. It's expected this file is in m5/configs/example. 45config_path = os.path.dirname(os.path.abspath(__file__)) 46config_root = os.path.dirname(config_path) 47m5_root = os.path.dirname(config_root) 48 49parser = optparse.OptionParser() 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") 58 59# 60# Add the ruby specific and protocol specific options 61# 62Ruby.define_options(parser) 63 64execfile(os.path.join(config_root, "common", "Options.py")) 65 66(options, args) = parser.parse_args() 67 68# 69# Set the default cache size and associativity to be very small to encourage 70# races between requests and writebacks. 71# 72options.l1d_size="256B" 73options.l1i_size="256B" 74options.l2_size="512B" 75options.l3_size="1kB" 76options.l1d_assoc=2 77options.l1i_assoc=2 78options.l2_assoc=2 79options.l3_assoc=2 80 81if args: 82 print "Error: script doesn't take any positional arguments" 83 sys.exit(1) 84 85block_size = 64 86 87if options.num_cpus > block_size: 88 print "Error: Number of testers %d limited to %d because of false sharing" \ 89 % (options.num_cpus, block_size) 90 sys.exit(1) 91 92# 93# Currently ruby does not support atomic, functional, or uncacheable accesses 94# 95cpus = [ MemTest(atomic = False, \ 96 max_loads = options.maxloads, \ 97 issue_dmas = False, \ 98 percent_functional = 0, \ 99 percent_uncacheable = 0, \ 100 progress_interval = options.progress) \ 101 for i in xrange(options.num_cpus) ] 102 103system = System(cpu = cpus, 104 funcmem = PhysicalMemory(), 105 physmem = PhysicalMemory()) 106 107if options.num_dmas > 0: 108 dmas = [ MemTest(atomic = False, \ 109 max_loads = options.maxloads, \ 110 issue_dmas = True, \ 111 percent_functional = 0, \ 112 percent_uncacheable = 0, \ 113 progress_interval = options.progress) \ 114 for i in xrange(options.num_dmas) ] 115 system.dma_devices = dmas 116else: 117 dmas = [] 118 119system.ruby = Ruby.create_system(options, \ 120 system, \ 121 dma_devices = dmas) 122 123# 124# The tester is most effective when randomization is turned on and 125# artifical delay is randomly inserted on messages 126# 127system.ruby.randomization = True 128 129assert(len(cpus) == len(system.ruby.cpu_ruby_ports)) 130 131for (i, cpu) in enumerate(cpus): 132 # 133 # Tie the cpu memtester ports to the correct system ports 134 # 135 cpu.test = system.ruby.cpu_ruby_ports[i].port 136 cpu.functional = system.funcmem.port 137 138 # 139 # Since the memtester is incredibly bursty, increase the deadlock 140 # threshold to 5 million cycles 141 # 142 system.ruby.cpu_ruby_ports[i].deadlock_threshold = 5000000 143 144for (i, dma) in enumerate(dmas): 145 # 146 # Tie the dma memtester ports to the correct functional port 147 # Note that the test port has already been connected to the dma_sequencer 148 # 149 dma.functional = system.funcmem.port 150 151# ----------------------- 152# run simulation 153# ----------------------- 154 155root = Root( system = system ) 156root.system.mem_mode = 'timing' 157 158# Not much point in this being higher than the L1 latency 159m5.ticks.setGlobalFrequency('1ns') 160 161# instantiate configuration 162m5.instantiate() 163 164# simulate until program terminates 165exit_event = m5.simulate(options.maxtick) 166 167print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() 168