LRU caching for flood rule priority.

faucet/valve_flood.py

@@ -17,6 +17,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import functools
 from collections import defaultdict
 
 from faucet import valve_of
@@ -85,6 +86,7 @@ def floods_to_root(self, _dp_obj):
         """Return True if the given dp floods (only) to root switch"""
         return False
 
+    @functools.lru_cache(maxsize=1024)
     def _mask_flood_priority(self, eth_dst_mask):
         return self.flood_priority + valve_packet.mac_mask_bits(eth_dst_mask)
 
@@ -127,6 +129,7 @@ def _build_flood_rule(self, match, command, flood_acts, flood_priority):
             inst=[valve_of.apply_actions(flood_acts)],
             priority=flood_priority)
 
+    @functools.lru_cache(maxsize=1024)
     def _vlan_flood_priority(self, eth_type, eth_dst_mask):
         priority = self._mask_flood_priority(eth_dst_mask)
         if eth_type:

faucet/valve_packet.py

@@ -72,6 +72,7 @@
 MAC_MASK_BITMAP = {(2**EUI_BITS - 2**i): (EUI_BITS - i) for i in range(0, EUI_BITS + 1)}
 
 
+@functools.lru_cache(maxsize=1024)
 def mac_mask_bits(mac_mask):
     """Return number of bits in MAC mask or 0."""
     if mac_mask is not None:
@@ -377,6 +378,7 @@ def lacp_actor_up(lacp_pkt):
     return 0
 
 
+@functools.lru_cache(maxsize=1024)
 def lacp_reqreply(eth_src,
                   actor_system, actor_key, actor_port,
                   actor_state_synchronization=0,