Ruby.py revision 10311 
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13# Copyright (c) 2006-2007 The Regents of The University of Michigan
14# Copyright (c) 2009 Advanced Micro Devices, Inc.
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39#
40# Authors: Brad Beckmann
41
42import math
43import m5
44from m5.objects import *
45from m5.defines import buildEnv
46from m5.util import addToPath, fatal
47
48addToPath('../topologies')
49
50def define_options(parser):
51    # By default, ruby uses the simple timing cpu
52    parser.set_defaults(cpu_type="timing")
53
54    parser.add_option("--ruby-clock", action="store", type="string",
55                      default='2GHz',
56                      help="Clock for blocks running at Ruby system's speed")
57
58    # Options related to cache structure
59    parser.add_option("--ports", action="store", type="int", default=4,
60                      help="used of transitions per cycle which is a proxy \
61                            for the number of ports.")
62
63    # ruby network options
64    parser.add_option("--topology", type="string", default="Crossbar",
65                 help="check src/mem/ruby/network/topologies for complete set")
66    parser.add_option("--mesh-rows", type="int", default=1,
67                      help="the number of rows in the mesh topology")
68    parser.add_option("--garnet-network", type="choice",
69                      choices=['fixed', 'flexible'], help="'fixed'|'flexible'")
70    parser.add_option("--network-fault-model", action="store_true", default=False,
71                      help="enable network fault model: see src/mem/ruby/network/fault_model/")
72
73    # ruby mapping options
74    parser.add_option("--numa-high-bit", type="int", default=0,
75                      help="high order address bit to use for numa mapping. " \
76                           "0 = highest bit, not specified = lowest bit")
77
78    # ruby sparse memory options
79    parser.add_option("--use-map", action="store_true", default=False)
80    parser.add_option("--map-levels", type="int", default=4)
81
82    parser.add_option("--recycle-latency", type="int", default=10,
83                      help="Recycle latency for ruby controller input buffers")
84
85    parser.add_option("--random_seed", type="int", default=1234,
86                      help="Used for seeding the random number generator")
87
88    parser.add_option("--ruby_stats", type="string", default="ruby.stats")
89
90    protocol = buildEnv['PROTOCOL']
91    exec "import %s" % protocol
92    eval("%s.define_options(parser)" % protocol)
93
94def create_topology(controllers, options):
95    """ Called from create_system in configs/ruby/<protocol>.py
96        Must return an object which is a subclass of BaseTopology
97        found in configs/topologies/BaseTopology.py
98        This is a wrapper for the legacy topologies.
99    """
100    exec "import %s as Topo" % options.topology
101    topology = eval("Topo.%s(controllers)" % options.topology)
102    return topology
103
104def create_system(options, system, piobus = None, dma_ports = []):
105
106    system.ruby = RubySystem(no_mem_vec = options.use_map)
107    ruby = system.ruby
108
109    # Set the network classes based on the command line options
110    if options.garnet_network == "fixed":
111        NetworkClass = GarnetNetwork_d
112        IntLinkClass = GarnetIntLink_d
113        ExtLinkClass = GarnetExtLink_d
114        RouterClass = GarnetRouter_d
115        InterfaceClass = GarnetNetworkInterface_d
116
117    elif options.garnet_network == "flexible":
118        NetworkClass = GarnetNetwork
119        IntLinkClass = GarnetIntLink
120        ExtLinkClass = GarnetExtLink
121        RouterClass = GarnetRouter
122        InterfaceClass = GarnetNetworkInterface
123
124    else:
125        NetworkClass = SimpleNetwork
126        IntLinkClass = SimpleIntLink
127        ExtLinkClass = SimpleExtLink
128        RouterClass = Switch
129        InterfaceClass = None
130
131    # Instantiate the network object so that the controllers can connect to it.
132    network = NetworkClass(ruby_system = ruby, topology = options.topology,
133            routers = [], ext_links = [], int_links = [], netifs = [])
134    ruby.network = network
135
136    protocol = buildEnv['PROTOCOL']
137    exec "import %s" % protocol
138    try:
139        (cpu_sequencers, dir_cntrls, topology) = \
140             eval("%s.create_system(options, system, dma_ports, ruby)"
141                  % protocol)
142    except:
143        print "Error: could not create sytem for ruby protocol %s" % protocol
144        raise
145
146    # Create a port proxy for connecting the system port. This is
147    # independent of the protocol and kept in the protocol-agnostic
148    # part (i.e. here).
149    sys_port_proxy = RubyPortProxy(ruby_system = ruby)
150
151    # Give the system port proxy a SimObject parent without creating a
152    # full-fledged controller
153    system.sys_port_proxy = sys_port_proxy
154
155    # Connect the system port for loading of binaries etc
156    system.system_port = system.sys_port_proxy.slave
157
158    # Create the network topology
159    topology.makeTopology(options, network, IntLinkClass, ExtLinkClass,
160            RouterClass)
161
162    if InterfaceClass != None:
163        netifs = [InterfaceClass(id=i) for (i,n) in enumerate(network.ext_links)]
164        network.netifs = netifs
165
166    if options.network_fault_model:
167        assert(options.garnet_network == "fixed")
168        network.enable_fault_model = True
169        network.fault_model = FaultModel()
170
171    # Loop through the directory controlers.
172    # Determine the total memory size of the ruby system and verify it is equal
173    # to physmem.  However, if Ruby memory is using sparse memory in SE
174    # mode, then the system should not back-up the memory state with
175    # the Memory Vector and thus the memory size bytes should stay at 0.
176    # Also set the numa bits to the appropriate values.
177    total_mem_size = MemorySize('0B')
178
179    ruby.block_size_bytes = options.cacheline_size
180    block_size_bits = int(math.log(options.cacheline_size, 2))
181
182    if options.numa_high_bit:
183        numa_bit = options.numa_high_bit
184    else:
185        # if the numa_bit is not specified, set the directory bits as the
186        # lowest bits above the block offset bits, and the numa_bit as the
187        # highest of those directory bits
188        dir_bits = int(math.log(options.num_dirs, 2))
189        numa_bit = block_size_bits + dir_bits - 1
190
191    for dir_cntrl in dir_cntrls:
192        total_mem_size.value += dir_cntrl.directory.size.value
193        dir_cntrl.directory.numa_high_bit = numa_bit
194
195    phys_mem_size = sum(map(lambda r: r.size(), system.mem_ranges))
196    assert(total_mem_size.value == phys_mem_size)
197    ruby.mem_size = total_mem_size
198
199    # Connect the cpu sequencers and the piobus
200    if piobus != None:
201        for cpu_seq in cpu_sequencers:
202            cpu_seq.pio_master_port = piobus.slave
203            cpu_seq.mem_master_port = piobus.slave
204
205            if buildEnv['TARGET_ISA'] == "x86":
206                cpu_seq.pio_slave_port = piobus.master
207
208    ruby._cpu_ports = cpu_sequencers
209    ruby.num_of_sequencers = len(cpu_sequencers)
210    ruby.random_seed    = options.random_seed
211