memtest.py revision 4627:2766d5cfbd9d
1# Copyright (c) 2006-2007 The Regents of The University of Michigan 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer; 8# redistributions in binary form must reproduce the above copyright 9# notice, this list of conditions and the following disclaimer in the 10# documentation and/or other materials provided with the distribution; 11# neither the name of the copyright holders nor the names of its 12# contributors may be used to endorse or promote products derived from 13# this software without specific prior written permission. 14# 15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26# 27# Authors: Ron Dreslinski 28 29import m5 30from m5.objects import * 31import os, optparse, sys 32m5.AddToPath('../common') 33 34parser = optparse.OptionParser() 35 36parser.add_option("-c", "--cache-levels", type="int", default=2, 37 metavar="LEVELS", 38 help="Number of cache levels [default: %default]") 39parser.add_option("-a", "--atomic", action="store_true", 40 help="Use atomic (non-timing) mode") 41parser.add_option("-b", "--blocking", action="store_true", 42 help="Use blocking caches") 43parser.add_option("-l", "--maxloads", default="1G", metavar="N", 44 help="Stop after N loads [default: %default]") 45parser.add_option("-m", "--maxtick", type="int", default=m5.MaxTick, 46 metavar="T", 47 help="Stop after T ticks") 48parser.add_option("-n", "--numtesters", type="int", default=8, 49 metavar="N", 50 help="Number of tester pseudo-CPUs [default: %default]") 51parser.add_option("-p", "--protocol", default="moesi", 52 help="Coherence protocol [default: %default]") 53 54parser.add_option("-f", "--functional", type="int", default=0, 55 metavar="PCT", 56 help="Target percentage of functional accesses " 57 "[default: %default]") 58parser.add_option("-u", "--uncacheable", type="int", default=0, 59 metavar="PCT", 60 help="Target percentage of uncacheable accesses " 61 "[default: %default]") 62 63(options, args) = parser.parse_args() 64 65if args: 66 print "Error: script doesn't take any positional arguments" 67 sys.exit(1) 68 69# Should generalize this someday... would be cool to have a loop that 70# just iterates, adding a level of caching each time. 71#if options.cache_levels != 2 and options.cache_levels != 0: 72# print "Error: number of cache levels must be 0 or 2" 73# sys.exit(1) 74 75if options.blocking: 76 num_l1_mshrs = 1 77 num_l2_mshrs = 1 78else: 79 num_l1_mshrs = 12 80 num_l2_mshrs = 92 81 82block_size = 64 83 84# -------------------- 85# Base L1 Cache 86# ==================== 87 88class L1(BaseCache): 89 latency = '1ns' 90 block_size = block_size 91 mshrs = num_l1_mshrs 92 tgts_per_mshr = 8 93 protocol = CoherenceProtocol(protocol=options.protocol) 94 95# ---------------------- 96# Base L2 Cache 97# ---------------------- 98 99class L2(BaseCache): 100 block_size = block_size 101 latency = '10ns' 102 mshrs = num_l2_mshrs 103 tgts_per_mshr = 16 104 write_buffers = 8 105 protocol = CoherenceProtocol(protocol=options.protocol) 106 107if options.numtesters > block_size: 108 print "Error: Number of testers limited to %s because of false sharing" \ 109 % (block_size) 110 sys.exit(1) 111 112cpus = [ MemTest(atomic=options.atomic, max_loads=options.maxloads, 113 percent_functional=options.functional, 114 percent_uncacheable=options.uncacheable, 115 progress_interval=1000) 116 for i in xrange(options.numtesters) ] 117 118# system simulated 119system = System(cpu = cpus, funcmem = PhysicalMemory(), 120 physmem = PhysicalMemory(latency = "100ns"), 121 membus = Bus(clock="500MHz", width=16)) 122 123# l2cache & bus 124if options.cache_levels == 2: 125 system.toL2Bus = Bus(clock="500MHz", width=16) 126 system.l2c = L2(size='64kB', assoc=8) 127 system.l2c.cpu_side = system.toL2Bus.port 128 129 # connect l2c to membus 130 system.l2c.mem_side = system.membus.port 131 132# add L1 caches 133for cpu in cpus: 134 if options.cache_levels == 2: 135 cpu.l1c = L1(size = '32kB', assoc = 4) 136 cpu.test = cpu.l1c.cpu_side 137 cpu.l1c.mem_side = system.toL2Bus.port 138 elif options.cache_levels == 1: 139 cpu.l1c = L1(size = '32kB', assoc = 4) 140 cpu.test = cpu.l1c.cpu_side 141 cpu.l1c.mem_side = system.membus.port 142 else: 143 cpu.test = system.membus.port 144 system.funcmem.port = cpu.functional 145 146# connect memory to membus 147system.physmem.port = system.membus.port 148 149 150# ----------------------- 151# run simulation 152# ----------------------- 153 154root = Root( system = system ) 155if options.atomic: 156 root.system.mem_mode = 'atomic' 157else: 158 root.system.mem_mode = 'timing' 159 160# Not much point in this being higher than the L1 latency 161m5.ticks.setGlobalFrequency('1ns') 162 163# instantiate configuration 164m5.instantiate(root) 165 166# simulate until program terminates 167exit_event = m5.simulate(options.maxtick) 168 169print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() 170