Tweak the cache sizes to be counted in units of 1024*1024 rather than

1000*1000.  This makes it easier to specify cache sizes for the buddy
system that don't have to be rounded up to the next power of two.  It
does make future reported results incompatible with past results.

src/ZEO/simul.py

@@ -32,7 +32,8 @@ def usage(msg):
 
 def main():
     # Parse options
-    cachelimit = 20*1000*1000
+    MB = 1024*1024
+    cachelimit = 20*MB
     simclass = ZEOCacheSimulation
     try:
         opts, args = getopt.getopt(sys.argv[1:], "bls:")
@@ -45,7 +46,7 @@ def main():
         if o == '-l':
             simclass = LRUCacheSimulation
         if o == '-s':
-            cachelimit = int(float(a) * 1e6)
+            cachelimit = int(float(a)*MB)
     if len(args) != 1:
         usage("exactly one file argument required")
         return 2