Ruby.py revision 9593 
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39#
40# Authors: Brad Beckmann
41
42import math
43import m5
44from m5.objects import *
45from m5.defines import buildEnv
46
47def define_options(parser):
48    # By default, ruby uses the simple timing cpu
49    parser.set_defaults(cpu_type="timing")
50
51    # ruby network options
52    parser.add_option("--topology", type="string", default="Crossbar",
53                 help="check src/mem/ruby/network/topologies for complete set")
54    parser.add_option("--mesh-rows", type="int", default=1,
55                      help="the number of rows in the mesh topology")
56    parser.add_option("--garnet-network", type="choice",
57                      choices=['fixed', 'flexible'], help="'fixed'|'flexible'")
58    parser.add_option("--network-fault-model", action="store_true", default=False,
59                      help="enable network fault model: see src/mem/ruby/network/fault_model/")
60
61    # ruby mapping options
62    parser.add_option("--numa-high-bit", type="int", default=0,
63                      help="high order address bit to use for numa mapping. " \
64                           "0 = highest bit, not specified = lowest bit")
65
66    # ruby sparse memory options
67    parser.add_option("--use-map", action="store_true", default=False)
68    parser.add_option("--map-levels", type="int", default=4)
69
70    parser.add_option("--recycle-latency", type="int", default=10,
71                      help="Recycle latency for ruby controller input buffers")
72
73    parser.add_option("--random_seed", type="int", default=1234,
74                      help="Used for seeding the random number generator")
75
76    parser.add_option("--ruby_stats", type="string", default="ruby.stats")
77
78    protocol = buildEnv['PROTOCOL']
79    exec "import %s" % protocol
80    eval("%s.define_options(parser)" % protocol)
81
82def create_topology(controllers, options):
83    """ Called from create_system in configs/ruby/<protocol>.py
84        Must return an object which is a subclass of BaseTopology
85        found in configs/topologies/BaseTopology.py
86        This is a wrapper for the legacy topologies.
87    """
88    exec "import %s as Topo" % options.topology
89    topology = eval("Topo.%s(controllers)" % options.topology)
90    return topology
91
92def create_system(options, system, piobus = None, dma_ports = []):
93
94    system.ruby = RubySystem(clock = options.clock,
95                             stats_filename = options.ruby_stats,
96                             no_mem_vec = options.use_map)
97    ruby = system.ruby
98
99    protocol = buildEnv['PROTOCOL']
100    exec "import %s" % protocol
101    try:
102        (cpu_sequencers, dir_cntrls, topology) = \
103             eval("%s.create_system(options, system, piobus, dma_ports, ruby)"
104                  % protocol)
105    except:
106        print "Error: could not create sytem for ruby protocol %s" % protocol
107        raise
108
109    # Create a port proxy for connecting the system port. This is
110    # independent of the protocol and kept in the protocol-agnostic
111    # part (i.e. here).
112    sys_port_proxy = RubyPortProxy(ruby_system = ruby)
113    # Give the system port proxy a SimObject parent without creating a
114    # full-fledged controller
115    system.sys_port_proxy = sys_port_proxy
116
117    # Connect the system port for loading of binaries etc
118    system.system_port = system.sys_port_proxy.slave
119
120
121    #
122    # Set the network classes based on the command line options
123    #
124    if options.garnet_network == "fixed":
125        class NetworkClass(GarnetNetwork_d): pass
126        class IntLinkClass(GarnetIntLink_d): pass
127        class ExtLinkClass(GarnetExtLink_d): pass
128        class RouterClass(GarnetRouter_d): pass
129    elif options.garnet_network == "flexible":
130        class NetworkClass(GarnetNetwork): pass
131        class IntLinkClass(GarnetIntLink): pass
132        class ExtLinkClass(GarnetExtLink): pass
133        class RouterClass(GarnetRouter): pass
134    else:
135        class NetworkClass(SimpleNetwork): pass
136        class IntLinkClass(SimpleIntLink): pass
137        class ExtLinkClass(SimpleExtLink): pass
138        class RouterClass(Switch): pass
139
140    #
141    # Important: the topology must be instantiated before the network and after
142    # the controllers. Hence the separation between topology definition and
143    # instantiation.
144    #
145    # gem5 SimObject defined in src/mem/ruby/network/Network.py
146    net_topology = Topology()
147    net_topology.description = topology.description
148
149    routers, int_links, ext_links = topology.makeTopology(options,
150                                    IntLinkClass, ExtLinkClass, RouterClass)
151
152    net_topology.num_routers = len(routers)
153    net_topology.int_links = int_links
154    net_topology.ext_links = ext_links
155
156    network = NetworkClass(ruby_system = ruby, topology = net_topology,
157                           routers = routers)
158
159    if options.network_fault_model:
160        assert(options.garnet_network == "fixed")
161        network.enable_fault_model = True
162        network.fault_model = FaultModel()
163
164    #
165    # Loop through the directory controlers.
166    # Determine the total memory size of the ruby system and verify it is equal
167    # to physmem.  However, if Ruby memory is using sparse memory in SE
168    # mode, then the system should not back-up the memory state with
169    # the Memory Vector and thus the memory size bytes should stay at 0.
170    # Also set the numa bits to the appropriate values.
171    #
172    total_mem_size = MemorySize('0B')
173
174    dir_bits = int(math.log(options.num_dirs, 2))
175    ruby.block_size_bytes = options.cacheline_size
176    block_size_bits = int(math.log(options.cacheline_size, 2))
177
178    if options.numa_high_bit:
179        numa_bit = options.numa_high_bit
180    else:
181        # if the numa_bit is not specified, set the directory bits as the
182        # lowest bits above the block offset bits, and the numa_bit as the
183        # highest of those directory bits
184        numa_bit = block_size_bits + dir_bits - 1
185
186    for dir_cntrl in dir_cntrls:
187        total_mem_size.value += dir_cntrl.directory.size.value
188        dir_cntrl.directory.numa_high_bit = numa_bit
189
190    phys_mem_size = sum(map(lambda mem: mem.range.size(),
191                            system.memories.unproxy(system)))
192    assert(total_mem_size.value == phys_mem_size)
193
194    ruby_profiler = RubyProfiler(ruby_system = ruby,
195                                 num_of_sequencers = len(cpu_sequencers))
196    ruby.network = network
197    ruby.profiler = ruby_profiler
198    ruby.mem_size = total_mem_size
199    ruby._cpu_ruby_ports = cpu_sequencers
200    ruby.random_seed    = options.random_seed
201