[KVM-AUTOTEST PATCH 10/28] KVM test: avoid printing address cache messages too often

[Michael Goldish <mgoldish@redhat.com>]

Currently, messages such as

(address cache) Adding cache entry: 11:22:33:44:55:66 ---> 10.20.30.40

are displayed for every IP address assignment caught by tcpdump.  These often
occur in clusters.  Therefore, to avoid bloating the log files, print a message
only if the last message for the same MAC address was printed more than 5
seconds ago.

Signed-off-by: Michael Goldish <mgoldish@redhat.com>
---
 client/tests/kvm/kvm_preprocessing.py |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/client/tests/kvm/kvm_preprocessing.py b/client/tests/kvm/kvm_preprocessing.py
index d2f94cd..90382cc 100644
--- a/client/tests/kvm/kvm_preprocessing.py
+++ b/client/tests/kvm/kvm_preprocessing.py
@@ -384,9 +384,11 @@ def _update_address_cache(address_cache, line):
         matches = re.findall(r"\w*:\w*:\w*:\w*:\w*:\w*", line)
         if matches and address_cache.get("last_seen"):
             mac_address = matches[0].lower()
-            logging.debug("(address cache) Adding cache entry: %s ---> %s",
-                          mac_address, address_cache.get("last_seen"))
+            if time.time() - address_cache.get("time_%s" % mac_address, 0) > 5:
+                logging.debug("(address cache) Adding cache entry: %s ---> %s",
+                              mac_address, address_cache.get("last_seen"))
             address_cache[mac_address] = address_cache.get("last_seen")
+            address_cache["time_%s" % mac_address] = time.time()
             del address_cache["last_seen"]
 
 
-- 
1.7.3.3