memtest.py revision 4467:cb5715e021ca 
1# Copyright (c) 2006-2007 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Ron Dreslinski
28
29import m5
30from m5.objects import *
31import os, optparse, sys
32m5.AddToPath('../common')
33
34parser = optparse.OptionParser()
35
36parser.add_option("--caches", action="store_true")
37parser.add_option("-t", "--timing", action="store_true")
38parser.add_option("-m", "--maxtick", type="int")
39parser.add_option("-l", "--maxloads", default = "1000000000000", type="int")
40parser.add_option("-n", "--numtesters", default = "8", type="int")
41parser.add_option("-p", "--protocol",
42                  default="moesi",
43                  help="The coherence protocol to use for the L1'a (i.e. MOESI, MOSI)")
44
45(options, args) = parser.parse_args()
46
47if args:
48     print "Error: script doesn't take any positional arguments"
49     sys.exit(1)
50
51# --------------------
52# Base L1 Cache
53# ====================
54
55class L1(BaseCache):
56    latency = '1ns'
57    block_size = 64
58    mshrs = 12
59    tgts_per_mshr = 8
60    protocol = CoherenceProtocol(protocol=options.protocol)
61
62# ----------------------
63# Base L2 Cache
64# ----------------------
65
66class L2(BaseCache):
67    block_size = 64
68    latency = '10ns'
69    mshrs = 92
70    tgts_per_mshr = 16
71    write_buffers = 8
72
73#MAX CORES IS 8 with the false sharing method
74if options.numtesters > 8:
75     print "Error: NUmber of testers limited to 8 because of false sharing"
76     sys,exit(1)
77
78cpus = [ MemTest(atomic=options.timing, max_loads=options.maxloads,
79                 percent_functional=50, percent_uncacheable=10,
80                 progress_interval=1000)
81         for i in xrange(options.numtesters) ]
82
83# system simulated
84system = System(cpu = cpus, funcmem = PhysicalMemory(),
85                physmem = PhysicalMemory(latency = "50ps"),
86                membus = Bus(clock="500GHz", width=16))
87
88# l2cache & bus
89if options.caches:
90    system.toL2Bus = Bus(clock="500GHz", width=16)
91    system.l2c = L2(size='64kB', assoc=8)
92    system.l2c.cpu_side = system.toL2Bus.port
93
94    # connect l2c to membus
95    system.l2c.mem_side = system.membus.port
96
97# add L1 caches
98for cpu in cpus:
99    if options.caches:
100         cpu.l1c = L1(size = '32kB', assoc = 4)
101         cpu.test = cpu.l1c.cpu_side
102         cpu.l1c.mem_side = system.toL2Bus.port
103    else:
104         cpu.test = system.membus.port
105    system.funcmem.port = cpu.functional
106
107# connect memory to membus
108system.physmem.port = system.membus.port
109
110
111# -----------------------
112# run simulation
113# -----------------------
114
115root = Root( system = system )
116if options.timing:
117    root.system.mem_mode = 'timing'
118else:
119    root.system.mem_mode = 'atomic'
120
121# instantiate configuration
122m5.instantiate(root)
123
124# simulate until program terminates
125if options.maxtick:
126    exit_event = m5.simulate(options.maxtick)
127else:
128    exit_event = m5.simulate(10000000000000)
129
130print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause()
131