configs/example/ruby_mem_test.py

   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
  31 import m5
  32 from m5.objects import *
  33 from m5.defines import buildEnv
  34 from m5.util import addToPath
  35 import os, optparse, sys
  36 addToPath('../common')
  37 addToPath('../ruby')
  38
  39 import Ruby
  40
  41 if 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.
  45 config_path = os.path.dirname(os.path.abspath(__file__))
  46 config_root = os.path.dirname(config_path)
  47 m5_root = os.path.dirname(config_root)
  48
  49 parser = optparse.OptionParser()
  50
  51 parser.add_option("-l", "--maxloads", metavar="N", default=0,
  52                   help="Stop after N loads")
  53 parser.add_option("--progress", type="int", default=1000,
  54                   metavar="NLOADS",
  55                   help="Progress message interval "
  56                   "[default: %default]")
  57 parser.add_option("--num-dmas", type="int", default=0, help="# of dma testers")
  58 parser.add_option("--functional", type="int", default=0,
  59                   help="percentage of accesses that should be functional")
  60 parser.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 #
  66 Ruby.define_options(parser)
  67
  68 execfile(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 #
  76 options.l1d_size="256B"
  77 options.l1i_size="256B"
  78 options.l2_size="512B"
  79 options.l3_size="1kB"
  80 options.l1d_assoc=2
  81 options.l1i_assoc=2
  82 options.l2_assoc=2
  83 options.l3_assoc=2
  84
  85 if args:
  86      print "Error: script doesn't take any positional arguments"
  87      sys.exit(1)
  88
  89 block_size = 64
  90
  91 if 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 #
  99 cpus = [ 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
 108 system = System(cpu = cpus,
 109                 funcmem = PhysicalMemory(),
 110                 physmem = PhysicalMemory())
 111
 112 if options.num_dmas > 0:
 113     dmas = [ MemTest(atomic = False,
 114                      max_loads = options.maxloads,
 115                      issue_dmas = True,
 116                      percent_functional = 0,
 117                      percent_uncacheable = 0,
 118                      progress_interval = options.progress,
 119                      warn_on_failure = options.warn_on_failure) \
 120              for i in xrange(options.num_dmas) ]
 121     system.dma_devices = dmas
 122 else:
 123     dmas = []
 124
 125 Ruby.create_system(options, system, dma_devices = dmas)
 126
 127 #
 128 # The tester is most effective when randomization is turned on and
 129 # artifical delay is randomly inserted on messages
 130 #
 131 system.ruby.randomization = True
 132
 133 assert(len(cpus) == len(system.ruby._cpu_ruby_ports))
 134
 135 for (i, cpu) in enumerate(cpus):
 136     #
 137     # Tie the cpu memtester ports to the correct system ports
 138     #
 139     cpu.test = system.ruby._cpu_ruby_ports[i].port
 140     cpu.functional = system.funcmem.port
 141
 142     #
 143     # Since the memtester is incredibly bursty, increase the deadlock
 144     # threshold to 5 million cycles
 145     #
 146     system.ruby._cpu_ruby_ports[i].deadlock_threshold = 5000000
 147
 148     #
 149     # Ruby doesn't need the backing image of memory when running with
 150     # the tester.
 151     #
 152     system.ruby._cpu_ruby_ports[i].access_phys_mem = False
 153
 154 for (i, dma) in enumerate(dmas):
 155     #
 156     # Tie the dma memtester ports to the correct functional port
 157     # Note that the test port has already been connected to the dma_sequencer
 158     #
 159     dma.functional = system.funcmem.port
 160
 161 # -----------------------
 162 # run simulation
 163 # -----------------------
 164
 165 root = Root( system = system )
 166 root.system.mem_mode = 'timing'
 167
 168 # Not much point in this being higher than the L1 latency
 169 m5.ticks.setGlobalFrequency('1ns')
 170
 171 # instantiate configuration
 172 m5.instantiate()
 173
 174 # simulate until program terminates
 175 exit_event = m5.simulate(options.maxtick)
 176
 177 print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause()