1 # Copyright (c) 2006-2007 The Regents of The University of Michigan
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.
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.
27 # Authors: Ron Dreslinski
30 from m5
.objects
import *
31 import os
, optparse
, sys
32 m5
.AddToPath('../common')
34 parser
= optparse
.OptionParser()
36 parser
.add_option("-a", "--atomic", action
="store_true",
37 help="Use atomic (non-timing) mode")
38 parser
.add_option("-b", "--blocking", action
="store_true",
39 help="Use blocking caches")
40 parser
.add_option("-l", "--maxloads", metavar
="N", default
=0,
41 help="Stop after N loads")
42 parser
.add_option("-m", "--maxtick", type="int", default
=m5
.MaxTick
,
44 help="Stop after T ticks")
47 # The "tree" specification is a colon-separated list of one or more
48 # integers. The first integer is the number of caches/testers
49 # connected directly to main memory. The last integer in the list is
50 # the number of testers associated with the uppermost level of memory
51 # (L1 cache, if there are caches, or main memory if no caches). Thus
52 # if there is only one integer, there are no caches, and the integer
53 # specifies the number of testers connected directly to main memory.
54 # The other integers (if any) specify the number of caches at each
55 # level of the hierarchy between.
59 # "2:1" Two caches connected to memory with a single tester behind each
60 # (single-level hierarchy, two testers total)
62 # "2:2:1" Two-level hierarchy, 2 L1s behind each of 2 L2s, 4 testers total
64 parser
.add_option("-t", "--treespec", type="string", default
="8:1",
65 help="Colon-separated multilevel tree specification, "
66 "see script comments for details "
67 "[default: %default]")
69 parser
.add_option("--force-bus", action
="store_true",
70 help="Use bus between levels even with single cache")
72 parser
.add_option("-f", "--functional", type="int", default
=0,
74 help="Target percentage of functional accesses "
75 "[default: %default]")
76 parser
.add_option("-u", "--uncacheable", type="int", default
=0,
78 help="Target percentage of uncacheable accesses "
79 "[default: %default]")
81 parser
.add_option("--progress", type="int", default
=1000,
83 help="Progress message interval "
84 "[default: %default]")
86 (options
, args
) = parser
.parse_args()
89 print "Error: script doesn't take any positional arguments"
95 treespec
= [int(x
) for x
in options
.treespec
.split(':')]
96 numtesters
= reduce(lambda x
,y
: x
*y
, treespec
)
98 print "Error parsing treespec option"
101 if numtesters
> block_size
:
102 print "Error: Number of testers limited to %s because of false sharing" \
106 if len(treespec
) < 1:
107 print "Error parsing treespec"
110 # define prototype L1 cache
111 proto_l1
= BaseCache(size
= '32kB', assoc
= 4, block_size
= block_size
,
112 latency
= '1ns', tgts_per_mshr
= 8)
119 # build a list of prototypes, one for each level of treespec, starting
120 # at the end (last entry is tester objects)
121 prototypes
= [ MemTest(atomic
=options
.atomic
, max_loads
=options
.maxloads
,
122 percent_functional
=options
.functional
,
123 percent_uncacheable
=options
.uncacheable
,
124 progress_interval
=options
.progress
) ]
126 # next comes L1 cache, if any
127 if len(treespec
) > 1:
128 prototypes
.insert(0, proto_l1
)
130 # now add additional cache levels (if any) by scaling L1 params
131 while len(prototypes
) < len(treespec
):
132 # clone previous level and update params
135 next
.size
= prev
.size
* 4
136 next
.latency
= prev
.latency
* 10
137 next
.assoc
= prev
.assoc
* 2
138 prototypes
.insert(0, next
)
141 system
= System(funcmem
= PhysicalMemory(),
142 physmem
= PhysicalMemory(latency
= "100ns"))
144 def make_level(spec
, prototypes
, attach_obj
, attach_port
):
146 parent
= attach_obj
# use attach obj as config parent too
147 if len(spec
) > 1 and (fanout
> 1 or options
.force_bus
):
148 new_bus
= Bus(clock
="500MHz", width
=16)
149 new_bus
.port
= getattr(attach_obj
, attach_port
)
150 parent
.cpu_side_bus
= new_bus
153 objs
= [prototypes
[0]() for i
in xrange(fanout
)]
155 # we just built caches, more levels to go
158 cache
.mem_side
= getattr(attach_obj
, attach_port
)
159 make_level(spec
[1:], prototypes
[1:], cache
, "cpu_side")
161 # we just built the MemTest objects
164 t
.test
= getattr(attach_obj
, attach_port
)
165 t
.functional
= system
.funcmem
.port
167 make_level(treespec
, prototypes
, system
.physmem
, "port")
169 # -----------------------
171 # -----------------------
173 root
= Root( system
= system
)
175 root
.system
.mem_mode
= 'atomic'
177 root
.system
.mem_mode
= 'timing'
179 # Not much point in this being higher than the L1 latency
180 m5
.ticks
.setGlobalFrequency('1ns')
182 # instantiate configuration
185 # simulate until program terminates
186 exit_event
= m5
.simulate(options
.maxtick
)
188 print 'Exiting @ tick', m5
.curTick(), 'because', exit_event
.getCause()