domain: Don't pass timestamp to domain tick()

Since we might not poll stats info until a decent amount of time after
this timestamp, it messes up VM stats reporting.

Our usage still isn't correct because we use a later timestamp for
calculating total host usage. We could fix it by averaging out the
timestamp of each VM but I don't care that much at the moment.

virtManager/connection.py

@@ -1223,14 +1223,12 @@ class vmmConnection(vmmGObject):
 
         self.idle_add(tick_send_signals)
 
-        now = time.time()
-
         ticklist = []
         def add_to_ticklist(l, args=()):
             ticklist.extend([(o, args) for o in l.values()])
 
         updateVMs = noStatsUpdate and newVMs or vms
-        add_to_ticklist(updateVMs, (now,))
+        add_to_ticklist(updateVMs)
         add_to_ticklist(noStatsUpdate and newNets or nets)
         add_to_ticklist(noStatsUpdate and newPools or pools)
         add_to_ticklist(noStatsUpdate and newInterfaces or interfaces)
@@ -1251,15 +1249,16 @@ class vmmConnection(vmmGObject):
                                   "Ignoring.")
 
         if not noStatsUpdate:
-            self._recalculate_stats(now, updateVMs.values())
+            self._recalculate_stats(updateVMs.values())
             self.idle_emit("resources-sampled")
 
         return 1
 
-    def _recalculate_stats(self, now, vms):
+    def _recalculate_stats(self, vms):
         if not self._backend.is_open():
             return
 
+        now = time.time()
         expected = self.config.get_stats_history_length()
         current = len(self.record)
         if current > expected:

virtManager/domain.py

@@ -1713,10 +1713,7 @@ class vmmDomain(vmmLibvirtObject):
 
         return rd, wr
 
-    def tick(self, now=None):
-        if now is None:
-            now = time.time()
-
+    def tick(self):
         # Invalidate cached values
         self._invalidate_xml()
 
@@ -1734,6 +1731,7 @@ class vmmDomain(vmmLibvirtObject):
             self.is_management_domain()):
             info[1] = self.conn.host_memory_size()
 
+        now = time.time()
         (cpuTime, cpuTimeAbs,
          pcentHostCpu, pcentGuestCpu) = self._sample_cpu_stats(info, now)
         pcentCurrMem, curmem = self._sample_mem_stats(info)

virtManager/libvirtobject.py

@@ -79,8 +79,8 @@ class vmmLibvirtObject(vmmGObject):
         ignore = xml
         return
 
-    def tick(self, now):
-        ignore = now
+    def tick(self):
+        pass
 
 
     ##################