diff options
Diffstat (limited to 'configs/example')
| -rw-r--r-- | configs/example/memtest.py | 92 |
1 files changed, 64 insertions, 28 deletions
diff --git a/configs/example/memtest.py b/configs/example/memtest.py index 9fd943aaa..9027a9866 100644 --- a/configs/example/memtest.py +++ b/configs/example/memtest.py @@ -33,14 +33,32 @@ m5.AddToPath('../common') parser = optparse.OptionParser() -parser.add_option("--caches", action="store_true") -parser.add_option("-t", "--timing", action="store_true") -parser.add_option("-m", "--maxtick", type="int") -parser.add_option("-l", "--maxloads", default = "1000000000000", type="int") -parser.add_option("-n", "--numtesters", default = "8", type="int") -parser.add_option("-p", "--protocol", - default="moesi", - help="The coherence protocol to use for the L1'a (i.e. MOESI, MOSI)") +parser.add_option("-c", "--cache-levels", type="int", default=2, + metavar="LEVELS", + help="Number of cache levels [default: %default]") +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("-l", "--maxloads", default="1G", metavar="N", + help="Stop after N loads [default: %default]") +parser.add_option("-m", "--maxtick", type="int", default=m5.MaxTick, + metavar="T", + help="Stop after T ticks") +parser.add_option("-n", "--numtesters", type="int", default=8, + metavar="N", + help="Number of tester pseudo-CPUs [default: %default]") +parser.add_option("-p", "--protocol", default="moesi", + help="Coherence protocol [default: %default]") + +parser.add_option("-f", "--functional", type="int", default=0, + metavar="PCT", + help="Target percentage of functional accesses " + "[default: %default]") +parser.add_option("-u", "--uncacheable", type="int", default=0, + metavar="PCT", + help="Target percentage of uncacheable accesses " + "[default: %default]") (options, args) = parser.parse_args() @@ -48,14 +66,29 @@ if args: print "Error: script doesn't take any positional arguments" sys.exit(1) +# Should generalize this someday... would be cool to have a loop that +# just iterates, adding a level of caching each time. +#if options.cache_levels != 2 and options.cache_levels != 0: +# print "Error: number of cache levels must be 0 or 2" +# sys.exit(1) + +if options.blocking: + num_l1_mshrs = 1 + num_l2_mshrs = 1 +else: + num_l1_mshrs = 12 + num_l2_mshrs = 92 + +block_size = 64 + # -------------------- # Base L1 Cache # ==================== class L1(BaseCache): latency = '1ns' - block_size = 64 - mshrs = 12 + block_size = block_size + mshrs = num_l1_mshrs tgts_per_mshr = 8 protocol = CoherenceProtocol(protocol=options.protocol) @@ -64,29 +97,31 @@ class L1(BaseCache): # ---------------------- class L2(BaseCache): - block_size = 64 + block_size = block_size latency = '10ns' - mshrs = 92 + mshrs = num_l2_mshrs tgts_per_mshr = 16 write_buffers = 8 + protocol = CoherenceProtocol(protocol=options.protocol) -#MAX CORES IS 8 with the false sharing method -if options.numtesters > 8: - print "Error: NUmber of testers limited to 8 because of false sharing" - sys,exit(1) +if options.numtesters > block_size: + print "Error: Number of testers limited to %s because of false sharing" \ + % (block_size) + sys.exit(1) -cpus = [ MemTest(atomic=not options.timing, max_loads=options.maxloads, - percent_functional=50, percent_uncacheable=10, +cpus = [ MemTest(atomic=options.atomic, max_loads=options.maxloads, + percent_functional=options.functional, + percent_uncacheable=options.uncacheable, progress_interval=1000) for i in xrange(options.numtesters) ] # system simulated system = System(cpu = cpus, funcmem = PhysicalMemory(), - physmem = PhysicalMemory(latency = "50ps"), + physmem = PhysicalMemory(latency = "100ns"), membus = Bus(clock="500MHz", width=16)) # l2cache & bus -if options.caches: +if options.cache_levels == 2: system.toL2Bus = Bus(clock="500MHz", width=16) system.l2c = L2(size='64kB', assoc=8) system.l2c.cpu_side = system.toL2Bus.port @@ -96,10 +131,14 @@ if options.caches: # add L1 caches for cpu in cpus: - if options.caches: + if options.cache_levels == 2: cpu.l1c = L1(size = '32kB', assoc = 4) cpu.test = cpu.l1c.cpu_side cpu.l1c.mem_side = system.toL2Bus.port + elif options.cache_levels == 1: + cpu.l1c = L1(size = '32kB', assoc = 4) + cpu.test = cpu.l1c.cpu_side + cpu.l1c.mem_side = system.membus.port else: cpu.test = system.membus.port system.funcmem.port = cpu.functional @@ -113,10 +152,10 @@ system.physmem.port = system.membus.port # ----------------------- root = Root( system = system ) -if options.timing: - root.system.mem_mode = 'timing' -else: +if options.atomic: root.system.mem_mode = 'atomic' +else: + root.system.mem_mode = 'timing' # Not much point in this being higher than the L1 latency m5.ticks.setGlobalFrequency('1ns') @@ -125,9 +164,6 @@ m5.ticks.setGlobalFrequency('1ns') m5.instantiate(root) # simulate until program terminates -if options.maxtick: - exit_event = m5.simulate(options.maxtick) -else: - exit_event = m5.simulate(10000000000000) +exit_event = m5.simulate(options.maxtick) print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() |