control.py: fix get_memory_usage, add a sample client tool

misc/getmem.py

@@ -0,0 +1,18 @@
+#! /usr/bin/python
+
+from foolscap import Tub
+from foolscap.eventual import eventually
+import sys
+from twisted.internet import reactor
+
+def go():
+    t = Tub()
+    d = t.getReference(sys.argv[1])
+    d.addCallback(lambda rref: rref.callRemote("get_memory_usage"))
+    def _got(res):
+        print res
+        reactor.stop()
+    d.addCallback(_got)
+
+eventually(go)
+reactor.run()

src/allmydata/control.py

@@ -29,5 +29,7 @@ class ControlServer(Referenceable, service.Service):
         for line in open("/proc/self/status", "r").readlines():
             name, right = line.split(":",2)
             if name in stat_names:
-                stats[name] = int(right.strip()) * 1024
+                assert right.endswith(" kB\n")
+                right = right[:-4]
+                stats[name] = int(right) * 1024
         return stats