Xena: Modify aggregate_stats one port no stats when bi-direction

Xena exception when no stats collected on receive on one port
during bi-directional traffic. Modify aggregate_stats in the
XenaDriver.py, add judge whether the two port both has stats,
if one port has no stats, the result use the port's value which
has stats.

JIRA: VSPERF-327

Change-Id: I18c349d609a2834907f0383dbfbebd5cd281f541
Signed-off-by: liting <tli@redhat.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/tools/pkt_gen/xena/XenaDriver.py b/tools/pkt_gen/xena/XenaDriver.py
index aa8443c9..d3862312 100644
--- a/tools/pkt_gen/xena/XenaDriver.py
+++ b/tools/pkt_gen/xena/XenaDriver.py
@@ -1001,9 +1001,21 @@ class XenaTXStats(object):
         mydict = statdict
         return mydict
 
-
 def aggregate_stats(stat1, stat2):
     """
+    Judge whether stat1 and stat2 both have same key, if both have same key, 
+    call the aggregate fuction, else use the stat1's value
+    """
+    newstat = dict()
+    for keys in stat1.keys():
+        if keys in stat2 and isinstance(stat1[keys], dict):
+            newstat[keys] = aggregate(stat1[keys], stat2[keys])
+        else:
+            newstat[keys] = stat1[keys]
+    return newstat
+
+def aggregate(stat1, stat2):
+    """
     Recursive function to aggregate two sets of statistics. This is used when
     bi directional traffic is done and statistics need to be calculated based
     on two sets of statistics.
@@ -1014,7 +1026,7 @@ def aggregate_stats(stat1, stat2):
     newstat = dict()
     for (keys1, keys2) in zip(stat1.keys(), stat2.keys()):
         if isinstance(stat1[keys1], dict):
-            newstat[keys1] = aggregate_stats(stat1[keys1], stat2[keys2])
+            newstat[keys1] = aggregate(stat1[keys1], stat2[keys2])
         else:
             if not isinstance(stat1[keys1], int) and not isinstance(
                     [keys1], float):