memtest-ruby.py revision 9120 
1# Copyright (c) 2006-2007 The Regents of The University of Michigan
2# Copyright (c) 2010 Advanced Micro Devices, Inc.
3# All rights reserved.
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27#
28# Authors: Ron Dreslinski
29
30import m5
31from m5.objects import *
32from m5.defines import buildEnv
33from m5.util import addToPath
34import os, optparse, sys
35
36# Get paths we might need
37config_path = os.path.dirname(os.path.abspath(__file__))
38config_root = os.path.dirname(config_path)
39m5_root = os.path.dirname(config_root)
40addToPath(config_root+'/configs/common')
41addToPath(config_root+'/configs/ruby')
42addToPath(config_root+'/configs/topologies')
43
44import Ruby
45import Options
46
47parser = optparse.OptionParser()
48Options.addCommonOptions(parser)
49
50# Add the ruby specific and protocol specific options
51Ruby.define_options(parser)
52
53(options, args) = parser.parse_args()
54
55#
56# Set the default cache size and associativity to be very small to encourage
57# races between requests and writebacks.
58#
59options.l1d_size="256B"
60options.l1i_size="256B"
61options.l2_size="512B"
62options.l3_size="1kB"
63options.l1d_assoc=2
64options.l1i_assoc=2
65options.l2_assoc=2
66options.l3_assoc=2
67
68#MAX CORES IS 8 with the fals sharing method
69nb_cores = 8
70
71# ruby does not support atomic, functional, or uncacheable accesses
72cpus = [ MemTest(atomic=False, percent_functional=50,
73                 percent_uncacheable=0, suppress_func_warnings=True) \
74         for i in xrange(nb_cores) ]
75
76# overwrite options.num_cpus with the nb_cores value
77options.num_cpus = nb_cores
78
79# system simulated
80system = System(cpu = cpus,
81                funcmem = SimpleMemory(in_addr_map = False),
82                funcbus = NoncoherentBus(),
83                physmem = SimpleMemory())
84
85Ruby.create_system(options, system)
86
87assert(len(cpus) == len(system.ruby._cpu_ruby_ports))
88
89for (i, ruby_port) in enumerate(system.ruby._cpu_ruby_ports):
90     #
91     # Tie the cpu test and functional ports to the ruby cpu ports and
92     # physmem, respectively
93     #
94     cpus[i].test = ruby_port.slave
95     cpus[i].functional = system.funcbus.slave
96
97     #
98     # Since the memtester is incredibly bursty, increase the deadlock
99     # threshold to 1 million cycles
100     #
101     ruby_port.deadlock_threshold = 1000000
102
103     #
104     # Ruby doesn't need the backing image of memory when running with
105     # the tester.
106     #
107     ruby_port.access_phys_mem = False
108
109# connect reference memory to funcbus
110system.funcmem.port = system.funcbus.master
111
112# -----------------------
113# run simulation
114# -----------------------
115
116root = Root(full_system = False, system = system)
117root.system.mem_mode = 'timing'
118
119# Not much point in this being higher than the L1 latency
120m5.ticks.setGlobalFrequency('1ns')
121