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
  59 #
  60 # Add the ruby specific and protocol specific options
  61 #
  62 Ruby.define_options(parser)
  63
  64 execfile(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 #
  72 options.l1d_size="256B"
  73 options.l1i_size="256B"
  74 options.l2_size="512B"
  75 options.l3_size="1kB"
  76 options.l1d_assoc=2
  77 options.l1i_assoc=2
  78 options.l2_assoc=2
  79 options.l3_assoc=2
  80
  81 if args:
  82      print "Error: script doesn't take any positional arguments"
  83      sys.exit(1)
  84
  85 block_size = 64
  86
  87 if 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 #
  95 cpus = [ 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
 103 system = System(cpu = cpus,
 104                 funcmem = PhysicalMemory(),
 105                 physmem = PhysicalMemory())
 106
 107 if 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
 116 else:
 117     dmas = []
 118
 119 system.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 #
 127 system.ruby.randomization = True
 128
 129 assert(len(cpus) == len(system.ruby._cpu_ruby_ports))
 130
 131 for (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
 144 for (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
 155 root = Root( system = system )
 156 root.system.mem_mode = 'timing'
 157
 158 # Not much point in this being higher than the L1 latency
 159 m5.ticks.setGlobalFrequency('1ns')
 160
 161 # instantiate configuration
 162 m5.instantiate()
 163
 164 # simulate until program terminates
 165 exit_event = m5.simulate(options.maxtick)
 166
 167 print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause()