diff --git a/configs/example/fs.py b/configs/example/fs.py
index bab6a7229..f0e32e97f 100644
--- a/configs/example/fs.py
+++ b/configs/example/fs.py
@@ -43,6 +43,7 @@ parser = optparse.OptionParser()
 parser.add_option("-d", "--detailed", action="store_true")
 parser.add_option("-t", "--timing", action="store_true")
 parser.add_option("-n", "--num_cpus", type="int", default=1)
+parser.add_option("--caches", action="store_true")
 parser.add_option("-m", "--maxtick", type="int")
 parser.add_option("--maxtime", type="float")
 parser.add_option("--dual", action="store_true",
@@ -65,6 +66,13 @@ if args:
     print "Error: script doesn't take any positional arguments"
     sys.exit(1)
 
+class MyCache(BaseCache):
+    assoc = 2
+    block_size = 64
+    latency = 1
+    mshrs = 10
+    tgts_per_mshr = 5
+
 # client system CPU is always simple... note this is an assignment of
 # a class, not an instance.
 ClientCPUClass = AtomicSimpleCPU
@@ -100,6 +108,9 @@ server_sys = makeLinuxAlphaSystem(server_mem_mode, bm[0])
 np = options.num_cpus
 server_sys.cpu = [ServerCPUClass(cpu_id=i) for i in xrange(np)]
 for i in xrange(np):
+    if options.caches:
+        server_sys.cpu[i].addPrivateSplitL1Caches(MyCache(size = '32kB'),
+                                                  MyCache(size = '64kB'))
     server_sys.cpu[i].connectMemPorts(server_sys.membus)
     server_sys.cpu[i].mem = server_sys.physmem