MESI_Three_Level.py revision 10970:ea8bdb1d9f1e 
1# Copyright (c) 2006-2007 The Regents of The University of Michigan
2# Copyright (c) 2009 Advanced Micro Devices, Inc.
3# Copyright (c) 2013 Mark D. Hill and David A. Wood
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
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9# notice, this list of conditions and the following disclaimer;
10# redistributions in binary form must reproduce the above copyright
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14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28#
29# Authors: Brad Beckmann
30#          Nilay Vaish
31
32import math
33import m5
34from m5.objects import *
35from m5.defines import buildEnv
36from Ruby import create_topology
37from Ruby import send_evicts
38
39#
40# Note: the L1 Cache latency is only used by the sequencer on fast path hits
41#
42class L0Cache(RubyCache):
43    latency = 1
44
45class L1Cache(RubyCache):
46    latency = 5
47
48#
49# Note: the L2 Cache latency is not currently used
50#
51class L2Cache(RubyCache):
52    latency = 15
53
54def define_options(parser):
55    parser.add_option("--num-clusters", type="int", default=1,
56            help="number of clusters in a design in which there are shared\
57            caches private to clusters")
58    return
59
60def create_system(options, full_system, system, dma_ports, ruby_system):
61
62    if buildEnv['PROTOCOL'] != 'MESI_Three_Level':
63        fatal("This script requires the MESI_Three_Level protocol to be built.")
64
65    cpu_sequencers = []
66
67    #
68    # The ruby network creation expects the list of nodes in the system to be
69    # consistent with the NetDest list.  Therefore the l1 controller nodes must be
70    # listed before the directory nodes and directory nodes before dma nodes, etc.
71    #
72    l0_cntrl_nodes = []
73    l1_cntrl_nodes = []
74    l2_cntrl_nodes = []
75    dir_cntrl_nodes = []
76    dma_cntrl_nodes = []
77
78    assert (options.num_cpus % options.num_clusters == 0)
79    num_cpus_per_cluster = options.num_cpus / options.num_clusters
80
81    assert (options.num_l2caches % options.num_clusters == 0)
82    num_l2caches_per_cluster = options.num_l2caches / options.num_clusters
83
84    l2_bits = int(math.log(num_l2caches_per_cluster, 2))
85    block_size_bits = int(math.log(options.cacheline_size, 2))
86    l2_index_start = block_size_bits + l2_bits
87
88    #
89    # Must create the individual controllers before the network to ensure the
90    # controller constructors are called before the network constructor
91    #
92    for i in xrange(options.num_clusters):
93        for j in xrange(num_cpus_per_cluster):
94            #
95            # First create the Ruby objects associated with this cpu
96            #
97            l0i_cache = L0Cache(size = '4096B', assoc = 1, is_icache = True,
98                start_index_bit = block_size_bits,
99                replacement_policy = LRUReplacementPolicy())
100
101            l0d_cache = L0Cache(size = '4096B', assoc = 1, is_icache = False,
102                start_index_bit = block_size_bits,
103                replacement_policy = LRUReplacementPolicy())
104
105            l0_cntrl = L0Cache_Controller(version = i*num_cpus_per_cluster + j,
106                          Icache = l0i_cache, Dcache = l0d_cache,
107                          send_evictions = send_evicts(options),
108                          clk_domain=system.cpu[i].clk_domain,
109                          ruby_system = ruby_system)
110
111            cpu_seq = RubySequencer(version = i, icache = l0i_cache,
112                        clk_domain=system.cpu[i].clk_domain,
113                        dcache = l0d_cache, ruby_system = ruby_system)
114
115            l0_cntrl.sequencer = cpu_seq
116
117            l1_cache = L1Cache(size = options.l1d_size, assoc = options.l1d_assoc,
118                            start_index_bit = block_size_bits, is_icache = False)
119
120            l1_cntrl = L1Cache_Controller(version = i*num_cpus_per_cluster+j,
121                          cache = l1_cache, l2_select_num_bits = l2_bits,
122                          cluster_id = i, ruby_system = ruby_system)
123
124            exec("ruby_system.l0_cntrl%d = l0_cntrl" % (
125                        i*num_cpus_per_cluster+j))
126            exec("ruby_system.l1_cntrl%d = l1_cntrl" % (
127                        i*num_cpus_per_cluster+j))
128
129            #
130            # Add controllers and sequencers to the appropriate lists
131            #
132            cpu_sequencers.append(cpu_seq)
133            l0_cntrl_nodes.append(l0_cntrl)
134            l1_cntrl_nodes.append(l1_cntrl)
135
136            # Connect the L0 and L1 controllers
137            l0_cntrl.bufferToL1 = l1_cntrl.bufferFromL0
138            l0_cntrl.bufferFromL1 = l1_cntrl.bufferToL0
139
140            # Connect the L1 controllers and the network
141            l1_cntrl.requestToL2 =  ruby_system.network.slave
142            l1_cntrl.responseToL2 =  ruby_system.network.slave
143            l1_cntrl.unblockToL2 =  ruby_system.network.slave
144
145            l1_cntrl.requestFromL2 =  ruby_system.network.master
146            l1_cntrl.responseFromL2 =  ruby_system.network.master
147
148
149        for j in xrange(num_l2caches_per_cluster):
150            l2_cache = L2Cache(size = options.l2_size,
151                               assoc = options.l2_assoc,
152                               start_index_bit = l2_index_start)
153
154            l2_cntrl = L2Cache_Controller(
155                        version = i * num_l2caches_per_cluster + j,
156                        L2cache = l2_cache, cluster_id = i,
157                        transitions_per_cycle=options.ports,
158                        ruby_system = ruby_system)
159
160            exec("ruby_system.l2_cntrl%d = l2_cntrl" % (
161                        i * num_l2caches_per_cluster + j))
162            l2_cntrl_nodes.append(l2_cntrl)
163
164            # Connect the L2 controllers and the network
165            l2_cntrl.DirRequestFromL2Cache = ruby_system.network.slave
166            l2_cntrl.L1RequestFromL2Cache = ruby_system.network.slave
167            l2_cntrl.responseFromL2Cache = ruby_system.network.slave
168
169            l2_cntrl.unblockToL2Cache = ruby_system.network.master
170            l2_cntrl.L1RequestToL2Cache = ruby_system.network.master
171            l2_cntrl.responseToL2Cache = ruby_system.network.master
172
173    phys_mem_size = sum(map(lambda r: r.size(), system.mem_ranges))
174    assert(phys_mem_size % options.num_dirs == 0)
175    mem_module_size = phys_mem_size / options.num_dirs
176
177    # Run each of the ruby memory controllers at a ratio of the frequency of
178    # the ruby system
179    # clk_divider value is a fix to pass regression.
180    ruby_system.memctrl_clk_domain = DerivedClockDomain(
181                                          clk_domain=ruby_system.clk_domain,
182                                          clk_divider=3)
183
184    for i in xrange(options.num_dirs):
185        #
186        # Create the Ruby objects associated with the directory controller
187        #
188        dir_size = MemorySize('0B')
189        dir_size.value = mem_module_size
190
191        dir_cntrl = Directory_Controller(version = i,
192                                         directory = RubyDirectoryMemory(
193                                             version = i, size = dir_size),
194                                         transitions_per_cycle = options.ports,
195                                         ruby_system = ruby_system)
196
197        exec("ruby_system.dir_cntrl%d = dir_cntrl" % i)
198        dir_cntrl_nodes.append(dir_cntrl)
199
200        # Connect the directory controllers and the network
201        dir_cntrl.requestToDir = ruby_system.network.master
202        dir_cntrl.responseToDir = ruby_system.network.master
203        dir_cntrl.responseFromDir = ruby_system.network.slave
204
205    for i, dma_port in enumerate(dma_ports):
206        #
207        # Create the Ruby objects associated with the dma controller
208        #
209        dma_seq = DMASequencer(version = i,
210                               ruby_system = ruby_system)
211
212        dma_cntrl = DMA_Controller(version = i,
213                                   dma_sequencer = dma_seq,
214                                   transitions_per_cycle = options.ports,
215                                   ruby_system = ruby_system)
216
217        exec("ruby_system.dma_cntrl%d = dma_cntrl" % i)
218        exec("ruby_system.dma_cntrl%d.dma_sequencer.slave = dma_port" % i)
219        dma_cntrl_nodes.append(dma_cntrl)
220
221        # Connect the dma controller to the network
222        dma_cntrl.responseFromDir = ruby_system.network.master
223        dma_cntrl.requestToDir = ruby_system.network.slave
224
225    all_cntrls = l0_cntrl_nodes + \
226                 l1_cntrl_nodes + \
227                 l2_cntrl_nodes + \
228                 dir_cntrl_nodes + \
229                 dma_cntrl_nodes
230
231    # Create the io controller and the sequencer
232    if full_system:
233        io_seq = DMASequencer(version=len(dma_ports), ruby_system=ruby_system)
234        ruby_system._io_port = io_seq
235        io_controller = DMA_Controller(version = len(dma_ports),
236                                       dma_sequencer = io_seq,
237                                       ruby_system = ruby_system)
238        ruby_system.io_controller = io_controller
239
240        # Connect the dma controller to the network
241        io_controller.responseFromDir = ruby_system.network.master
242        io_controller.requestToDir = ruby_system.network.slave
243
244        all_cntrls = all_cntrls + [io_controller]
245
246    topology = create_topology(all_cntrls, options)
247    return (cpu_sequencers, dir_cntrl_nodes, topology)
248