T-REX stl traffic send improvement for async calls

JIRA: CSIT-68
- show runtime statistics with running traffic
- T-REX driver async. driver

Change-Id: Ie5eb7021f610fb58383b033dda5b1b867f7d3d2c
Signed-off-by: Miroslav Miklus <mmiklus@cisco.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/resources/tools/t-rex/t-rex-stateless-stop.py b/resources/tools/t-rex/t-rex-stateless-stop.py
new file mode 100755
index 0000000000..e9accbe3ab
--- /dev/null
+++ b/resources/tools/t-rex/t-rex-stateless-stop.py
@@ -0,0 +1,97 @@
+#!/usr/bin/python
+
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""This script uses T-REX stateless API to drive t-rex instance.
+
+Requirements:
+- T-REX: https://github.com/cisco-system-traffic-generator/trex-core
+ - compiled and running T-REX process (eg. ./t-rex-64 -i -c 4)
+ - trex_stl_lib.api library
+- Script must be executed on a node with T-REX instance
+
+Functionality:
+1. Stop any running traffic
+
+"""
+
+import sys
+
+sys.path.insert(0, "/opt/trex-core-2.00/scripts/automation/"+\
+                   "trex_control_plane/stl/")
+from trex_stl_lib.api import *
+
+
+def stop_all_traffic_streams():
+    """Stop traffic if any is running.
+
+    :return: nothing
+    """
+
+    # create client
+    client = STLClient()
+
+    try:
+        # turn this off if too many logs
+        #client.set_verbose("high")
+
+        # connect to server
+        client.connect()
+
+        client.acquire(force=True)
+        client.stop(ports=[0, 1])
+
+        # read the stats after the test
+        stats = client.get_stats()
+
+        print "#####statistics (approx.)#####"
+        print json.dumps(stats, indent=4,
+                         separators=(',', ': '), sort_keys=True)
+
+        lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
+        lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
+
+        total_sent = stats[0]["opackets"] + stats[1]["opackets"]
+        total_rcvd = stats[0]["ipackets"] + stats[1]["ipackets"]
+
+        print "\npackets lost from 0 --> 1:   {0} pkts".format(lost_a)
+        print "packets lost from 1 --> 0:   {0} pkts".format(lost_b)
+
+    except STLError as ex_error:
+        print_error(str(ex_error))
+        sys.exit(1)
+
+    finally:
+        client.disconnect()
+
+
+
+def print_error(msg):
+    """Print error message on stderr.
+
+    :param msg: Error message to print.
+    :type msg: string
+    :return: nothing
+    """
+
+    sys.stderr.write(msg+'\n')
+
+
+def main():
+    """Main function."""
+
+    stop_all_traffic_streams()
+
+if __name__ == "__main__":
+    main()