diff options
Diffstat (limited to 'configs/example')
| -rw-r--r-- | configs/example/memcheck.py | 306 | ||||
| -rw-r--r-- | configs/example/memtest.py | 2 |
2 files changed, 307 insertions, 1 deletions
diff --git a/configs/example/memcheck.py b/configs/example/memcheck.py new file mode 100644 index 000000000..4f85223d9 --- /dev/null +++ b/configs/example/memcheck.py @@ -0,0 +1,306 @@ +# Copyright (c) 2015 ARM Limited +# All rights reserved. +# +# The license below extends only to copyright in the software and shall +# not be construed as granting a license to any other intellectual +# property including but not limited to intellectual property relating +# to a hardware implementation of the functionality of the software +# licensed hereunder. You may use the software subject to the license +# terms below provided that you ensure that this notice is replicated +# unmodified and in its entirety in all distributions of the software, +# modified or unmodified, in source code or in binary form. +# +# Copyright (c) 2006-2007 The Regents of The University of Michigan +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer; +# redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution; +# neither the name of the copyright holders nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +# Authors: Ron Dreslinski +# Andreas Hansson + +import optparse +import sys + +import m5 +from m5.objects import * + +parser = optparse.OptionParser() + +parser.add_option("-a", "--atomic", action="store_true", + help="Use atomic (non-timing) mode") +parser.add_option("-b", "--blocking", action="store_true", + help="Use blocking caches") +parser.add_option("-m", "--maxtick", type="int", default=m5.MaxTick, + metavar="T", + help="Stop after T ticks") +parser.add_option("-p", "--prefetchers", action="store_true", + help="Use prefetchers") +parser.add_option("-s", "--stridepref", action="store_true", + help="Use strided prefetchers") + +# This example script has a lot in common with the memtest.py in that +# it is designed to stress tests the memory system. However, this +# script uses oblivious traffic generators to create the stimuli, and +# couples them with memcheckers to verify that the data read matches +# the allowed outcomes. Just like memtest.py, the traffic generators +# and checkers are placed in a tree topology. At the bottom of the +# tree is a shared memory, and then at each level a number of +# generators and checkers are attached, along with a number of caches +# that them selves fan out to subtrees of generators and caches. Thus, +# it is possible to create a system with arbitrarily deep cache +# hierarchies, sharing or no sharing of caches, and generators not +# only at the L1s, but also at the L2s, L3s etc. +# +# The tree specification consists of two colon-separated lists of one +# or more integers, one for the caches, and one for the +# testers/generators. The first integer is the number of +# caches/testers closest to main memory. Each cache then fans out to a +# subtree. The last integer in the list is the number of +# caches/testers associated with the uppermost level of memory. The +# other integers (if any) specify the number of caches/testers +# connected at each level of the crossbar hierarchy. The tester string +# should have one element more than the cache string as there should +# always be testers attached to the uppermost caches. +# +# Since this script tests actual sharing, there is also a possibility +# to stress prefetching and the interaction between prefetchers and +# caches. The traffic generators switch between random address streams +# and linear address streams to ensure that the prefetchers will +# trigger. By default prefetchers are off. + +parser.add_option("-c", "--caches", type="string", default="3:2", + help="Colon-separated cache hierarchy specification, " + "see script comments for details " + "[default: %default]") +parser.add_option("-t", "--testers", type="string", default="1:0:2", + help="Colon-separated tester hierarchy specification, " + "see script comments for details " + "[default: %default]") +parser.add_option("--sys-clock", action="store", type="string", + default='1GHz', + help = """Top-level clock for blocks running at system + speed""") + +(options, args) = parser.parse_args() + +if args: + print "Error: script doesn't take any positional arguments" + sys.exit(1) + +# Start by parsing the command line options and do some basic sanity +# checking +try: + cachespec = [int(x) for x in options.caches.split(':')] + testerspec = [int(x) for x in options.testers.split(':')] +except: + print "Error: Unable to parse caches or testers option" + sys.exit(1) + +if len(cachespec) < 1: + print "Error: Must have at least one level of caches" + sys.exit(1) + +if len(cachespec) != len(testerspec) - 1: + print "Error: Testers must have one element more than caches" + sys.exit(1) + +if testerspec[-1] == 0: + print "Error: Must have testers at the uppermost level" + sys.exit(1) + +for t in testerspec: + if t < 0: + print "Error: Cannot have a negative number of testers" + sys.exit(1) + +for c in cachespec: + if c < 1: + print "Error: Must have 1 or more caches at each level" + sys.exit(1) + +# Determine the tester multiplier for each level as the string +# elements are per subsystem and it fans out +multiplier = [1] +for c in cachespec: + if c < 1: + print "Error: Must have at least one cache per level" + multiplier.append(multiplier[-1] * c) + +numtesters = 0 +for t, m in zip(testerspec, multiplier): + numtesters += t * m + +# Define a prototype L1 cache that we scale for all successive levels +proto_l1 = BaseCache(size = '32kB', assoc = 4, + hit_latency = 1, response_latency = 1, + tgts_per_mshr = 8, is_top_level = True) + +if options.blocking: + proto_l1.mshrs = 1 +else: + proto_l1.mshrs = 4 + +if options.prefetchers: + proto_l1.prefetcher = TaggedPrefetcher() +elif options.stridepref: + proto_l1.prefetcher = StridePrefetcher() + +cache_proto = [proto_l1] + +# Now add additional cache levels (if any) by scaling L1 params, the +# first element is Ln, and the last element L1 +for scale in cachespec[:-1]: + # Clone previous level and update params + prev = cache_proto[0] + next = prev() + next.size = prev.size * scale + next.hit_latency = prev.hit_latency * 10 + next.response_latency = prev.response_latency * 10 + next.assoc = prev.assoc * scale + next.mshrs = prev.mshrs * scale + next.is_top_level = False + cache_proto.insert(0, next) + +# Create a config to be used by all the traffic generators +cfg_file_name = "configs/example/memcheck.cfg" +cfg_file = open(cfg_file_name, 'w') + +# Three states, with random, linear and idle behaviours. The random +# and linear states access memory in the range [0 : 16 Mbyte] with 8 +# byte accesses. +cfg_file.write("STATE 0 10000000 RANDOM 65 0 16777216 8 50000 150000 0\n") +cfg_file.write("STATE 1 10000000 LINEAR 65 0 16777216 8 50000 150000 0\n") +cfg_file.write("STATE 2 10000000 IDLE\n") +cfg_file.write("INIT 0\n") +cfg_file.write("TRANSITION 0 1 0.5\n") +cfg_file.write("TRANSITION 0 2 0.5\n") +cfg_file.write("TRANSITION 1 0 0.5\n") +cfg_file.write("TRANSITION 1 2 0.5\n") +cfg_file.write("TRANSITION 2 0 0.5\n") +cfg_file.write("TRANSITION 2 1 0.5\n") +cfg_file.close() + +# Make a prototype for the tester to be used throughout +proto_tester = TrafficGen(config_file = cfg_file_name) + +# Set up the system along with a DRAM controller +system = System(physmem = DDR3_1600_x64()) + +system.voltage_domain = VoltageDomain(voltage = '1V') + +system.clk_domain = SrcClockDomain(clock = options.sys_clock, + voltage_domain = system.voltage_domain) + +system.memchecker = MemChecker() + +# For each level, track the next subsys index to use +next_subsys_index = [0] * (len(cachespec) + 1) + +# Recursive function to create a sub-tree of the cache and tester +# hierarchy +def make_cache_level(ncaches, prototypes, level, next_cache): + global next_subsys_index, proto_l1, testerspec, proto_tester + + index = next_subsys_index[level] + next_subsys_index[level] += 1 + + # Create a subsystem to contain the crossbar and caches, and + # any testers + subsys = SubSystem() + setattr(system, 'l%dsubsys%d' % (level, index), subsys) + + # The levels are indexing backwards through the list + ntesters = testerspec[len(cachespec) - level] + + testers = [proto_tester() for i in xrange(ntesters)] + checkers = [MemCheckerMonitor(memchecker = system.memchecker) \ + for i in xrange(ntesters)] + if ntesters: + subsys.tester = testers + subsys.checkers = checkers + + if level != 0: + # Create a crossbar and add it to the subsystem, note that + # we do this even with a single element on this level + xbar = CoherentXBar(width = 32) + subsys.xbar = xbar + if next_cache: + xbar.master = next_cache.cpu_side + + # Create and connect the caches, both the ones fanning out + # to create the tree, and the ones used to connect testers + # on this level + tree_caches = [prototypes[0]() for i in xrange(ncaches[0])] + tester_caches = [proto_l1() for i in xrange(ntesters)] + + subsys.cache = tester_caches + tree_caches + for cache in tree_caches: + cache.mem_side = xbar.slave + make_cache_level(ncaches[1:], prototypes[1:], level - 1, cache) + for tester, checker, cache in zip(testers, checkers, tester_caches): + tester.port = checker.slave + checker.master = cache.cpu_side + cache.mem_side = xbar.slave + else: + if not next_cache: + print "Error: No next-level cache at top level" + sys.exit(1) + + if ntesters > 1: + # Create a crossbar and add it to the subsystem + xbar = CoherentXBar(width = 32) + subsys.xbar = xbar + xbar.master = next_cache.cpu_side + for tester, checker in zip(testers, checkers): + tester.port = checker.slave + checker.master = xbar.slave + else: + # Single tester + testers[0].port = checkers[0].slave + checkers[0].master = next_cache.cpu_side + +# Top level call to create the cache hierarchy, bottom up +make_cache_level(cachespec, cache_proto, len(cachespec), None) + +# Connect the lowest level crossbar to the memory +last_subsys = getattr(system, 'l%dsubsys0' % len(cachespec)) +last_subsys.xbar.master = system.physmem.port + +root = Root(full_system = False, system = system) +if options.atomic: + root.system.mem_mode = 'atomic' +else: + root.system.mem_mode = 'timing' + +# The system port is never used in the tester so merely connect it +# to avoid problems +root.system.system_port = last_subsys.xbar.slave + +# Instantiate configuration +m5.instantiate() + +# Simulate until program terminates +exit_event = m5.simulate(options.maxtick) + +print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() diff --git a/configs/example/memtest.py b/configs/example/memtest.py index 71053f90b..6c1e657e4 100644 --- a/configs/example/memtest.py +++ b/configs/example/memtest.py @@ -110,7 +110,7 @@ if args: block_size = 64 -# Start by partins the command line options and do some basic sanity +# Start by parsing the command line options and do some basic sanity # checking try: cachespec = [int(x) for x in options.caches.split(':')] |