ad560a6642
--HG-- extra : convert_revision : 101735cca426903704ff2edaff051fa7c5bfc46c
175 lines
6.5 KiB
Python
175 lines
6.5 KiB
Python
# Copyright (c) 2006-2007 The Regents of The University of Michigan
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Ron Dreslinski
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import m5
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from m5.objects import *
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import os, optparse, sys
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m5.AddToPath('../common')
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parser = optparse.OptionParser()
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parser.add_option("-c", "--cache-levels", type="int", default=2,
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metavar="LEVELS",
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help="Number of cache levels [default: %default]")
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parser.add_option("-a", "--atomic", action="store_true",
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help="Use atomic (non-timing) mode")
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parser.add_option("-b", "--blocking", action="store_true",
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help="Use blocking caches")
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parser.add_option("-l", "--maxloads", default="1G", metavar="N",
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help="Stop after N loads [default: %default]")
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parser.add_option("-m", "--maxtick", type="int", default=m5.MaxTick,
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metavar="T",
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help="Stop after T ticks")
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parser.add_option("-n", "--numtesters", type="int", default=8,
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metavar="N",
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help="Number of tester pseudo-CPUs [default: %default]")
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parser.add_option("-t", "--treespec", type="string",
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help="Colon-separated multilevel tree specification")
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parser.add_option("--force-bus", action="store_true",
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help="Use bus between levels even with single cache")
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parser.add_option("-f", "--functional", type="int", default=0,
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metavar="PCT",
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help="Target percentage of functional accesses "
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"[default: %default]")
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parser.add_option("-u", "--uncacheable", type="int", default=0,
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metavar="PCT",
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help="Target percentage of uncacheable accesses "
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"[default: %default]")
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parser.add_option("--progress", type="int", default=1000,
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metavar="NLOADS",
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help="Progress message interval "
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"[default: %default]")
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(options, args) = parser.parse_args()
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if args:
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print "Error: script doesn't take any positional arguments"
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sys.exit(1)
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block_size = 64
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if not options.treespec:
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# convert simple cache_levels option to treespec
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treespec = [options.numtesters, 1]
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numtesters = options.numtesters
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else:
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try:
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treespec = [int(x) for x in options.treespec.split(':')]
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numtesters = reduce(lambda x,y: x*y, treespec)
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except:
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print "Error parsing treespec option"
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sys.exit(1)
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if numtesters > block_size:
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print "Error: Number of testers limited to %s because of false sharing" \
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% (block_size)
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sys.exit(1)
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if len(treespec) < 1:
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print "Error parsing treespec"
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sys.exit(1)
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# define prototype L1 cache
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proto_l1 = BaseCache(size = '32kB', assoc = 4, block_size = block_size,
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latency = '1ns', tgts_per_mshr = 8)
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if options.blocking:
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proto_l1.mshrs = 1
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else:
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proto_l1.mshrs = 8
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# build a list of prototypes, one for each cache level (L1 is at end,
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# followed by the tester pseudo-cpu objects)
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prototypes = [ proto_l1,
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MemTest(atomic=options.atomic, max_loads=options.maxloads,
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percent_functional=options.functional,
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percent_uncacheable=options.uncacheable,
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progress_interval=options.progress) ]
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while len(prototypes) < len(treespec):
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# clone previous level and update params
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prev = prototypes[0]
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next = prev()
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next.size = prev.size * 4
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next.latency = prev.latency * 10
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next.assoc = prev.assoc * 2
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prototypes.insert(0, next)
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# system simulated
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system = System(funcmem = PhysicalMemory(),
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physmem = PhysicalMemory(latency = "100ns"))
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def make_level(spec, prototypes, attach_obj, attach_port):
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fanout = spec[0]
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parent = attach_obj # use attach obj as config parent too
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if fanout > 1 or options.force_bus:
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new_bus = Bus(clock="500MHz", width=16)
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new_bus.port = getattr(attach_obj, attach_port)
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parent.cpu_side_bus = new_bus
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attach_obj = new_bus
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attach_port = "port"
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objs = [prototypes[0]() for i in xrange(fanout)]
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if len(spec) > 1:
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# we just built caches, more levels to go
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parent.cache = objs
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for cache in objs:
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cache.mem_side = getattr(attach_obj, attach_port)
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make_level(spec[1:], prototypes[1:], cache, "cpu_side")
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else:
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# we just built the MemTest objects
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parent.cpu = objs
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for t in objs:
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t.test = getattr(attach_obj, attach_port)
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t.functional = system.funcmem.port
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make_level(treespec, prototypes, system.physmem, "port")
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# -----------------------
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# run simulation
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# -----------------------
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root = Root( system = system )
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if options.atomic:
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root.system.mem_mode = 'atomic'
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else:
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root.system.mem_mode = 'timing'
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# Not much point in this being higher than the L1 latency
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m5.ticks.setGlobalFrequency('1ns')
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# instantiate configuration
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m5.instantiate(root)
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# simulate until program terminates
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exit_event = m5.simulate(options.maxtick)
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print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause()
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