diff --git a/configs/example/memtest-ruby.py b/configs/example/memtest-ruby.py
index 6a018d354..709d31844 100644
--- a/configs/example/memtest-ruby.py
+++ b/configs/example/memtest-ruby.py
@@ -68,6 +68,17 @@ parser.add_option("--progress", type="int", default=1000,
                   help="Progress message interval "
                   "[default: %default]")
 
+#
+# Set the default cache size and associativity to be very small to encourage
+# races between requests and writebacks.
+#
+parser.add_option("--l1d_size", type="string", default="256B")
+parser.add_option("--l1i_size", type="string", default="256B")
+parser.add_option("--l2_size", type="string", default="512B")
+parser.add_option("--l1d_assoc", type="int", default=2)
+parser.add_option("--l1i_assoc", type="int", default=2)
+parser.add_option("--l2_assoc", type="int", default=2)
+
 execfile(os.path.join(config_root, "common", "Options.py"))
 
 (options, args) = parser.parse_args()
diff --git a/tests/configs/memtest-ruby.py b/tests/configs/memtest-ruby.py
index d2be2791e..dd402498e 100644
--- a/tests/configs/memtest-ruby.py
+++ b/tests/configs/memtest-ruby.py
@@ -28,25 +28,62 @@
 
 import m5
 from m5.objects import *
+from m5.defines import buildEnv
+from m5.util import addToPath
+import os, optparse, sys
 
+if buildEnv['FULL_SYSTEM']:
+    panic("This script requires system-emulation mode (*_SE).")
+
+# Get paths we might need
+config_path = os.path.dirname(os.path.abspath(__file__))
+config_root = os.path.dirname(config_path)
+m5_root = os.path.dirname(config_root)
+addToPath(config_root+'/configs/common')
+addToPath(config_root+'/configs/ruby')
+
+import Ruby
+
+parser = optparse.OptionParser()
+
+#
+# Set the default cache size and associativity to be very small to encourage
+# races between requests and writebacks.
+#
+parser.add_option("--l1d_size", type="string", default="256B")
+parser.add_option("--l1i_size", type="string", default="256B")
+parser.add_option("--l2_size", type="string", default="512B")
+parser.add_option("--l1d_assoc", type="int", default=2)
+parser.add_option("--l1i_assoc", type="int", default=2)
+parser.add_option("--l2_assoc", type="int", default=2)
+
+execfile(os.path.join(config_root, "configs/common", "Options.py"))
+
+(options, args) = parser.parse_args()
 
 #MAX CORES IS 8 with the fals sharing method
 nb_cores = 8
 cpus = [ MemTest() for i in xrange(nb_cores) ]
 
-import ruby_config
-ruby_memory = ruby_config.generate("TwoLevel_SplitL1UnifiedL2.rb", nb_cores)
-
+# overwrite options.num_cpus with the nb_cores value
+options.num_cpus = nb_cores
+ 
 # system simulated
-system = System(cpu = cpus, funcmem = PhysicalMemory(),
-                physmem = ruby_memory,
-                membus = Bus(clock="500GHz", width=16))
+system = System(cpu = cpus,
+                funcmem = PhysicalMemory(),
+                physmem = PhysicalMemory())
 
-for cpu in cpus:
-    cpu.test = system.membus.port
-    cpu.functional = system.funcmem.port
+system.ruby = Ruby.create_system(options, system.physmem)
 
-system.physmem.port = system.membus.port
+assert(len(cpus) == len(system.ruby.cpu_ruby_ports))
+
+for (i, ruby_port) in enumerate(system.ruby.cpu_ruby_ports):
+     #
+     # Tie the cpu test and functional ports to the ruby cpu ports and
+     # physmem, respectively
+     #
+     cpus[i].test = ruby_port.port
+     cpus[i].functional = system.funcmem.port
 
 # -----------------------
 # run simulation