updating flow-sync-perf.py and adding new generate_flows script
diff --git a/perf-scripts/generate_flows.py b/perf-scripts/generate_flows.py
new file mode 100755
index 0000000..11d9c19
--- /dev/null
+++ b/perf-scripts/generate_flows.py
@@ -0,0 +1,90 @@
+#! /usr/bin/env python
+# -*- Mode: python; py-indent-offset: 4; tab-width: 8; indent-tabs-mode: t; -*-
+
+#
+# A script for generating a number of flows.
+#
+# The output of the script should be saved to a file, and the flows from
+# that file should be added by the following command:
+#
+# web/add_flow.py -f filename
+#
+# NOTE: Currently, some of the parameters fo the flows are hard-coded,
+# and all flows are between same source and destination DPID and ports
+# (differentiated by different matchSrcMac and matchDstMac).
+#
+
+import copy
+import pprint
+import os
+import sys
+import subprocess
+import json
+import argparse
+import io
+import time
+
+## Global Var ##
+
+DEBUG=0
+pp = pprint.PrettyPrinter(indent=4)
+
+## Worker Functions ##
+def log_error(txt):
+ print '%s' % (txt)
+
+def debug(txt):
+ if DEBUG:
+ print '%s' % (txt)
+
+
+if __name__ == "__main__":
+ usage_msg = "Generate a number of flows by using a pre-defined template.\n"
+ usage_msg = usage_msg + "\n"
+ usage_msg = usage_msg + "NOTE: This script is work-in-progress. Currently all flows are within same\n"
+ usage_msg = usage_msg + "pair of switch ports and contain auto-generated MAC-based matching conditions.\n"
+ usage_msg = usage_msg + "\n"
+ usage_msg = usage_msg + "Usage: %s <begin-flow-id> <end-flow-id>\n" % (sys.argv[0])
+ usage_msg = usage_msg + "\n"
+ usage_msg = usage_msg + " The output should be saved to a file, and the flows should be installed\n"
+ usage_msg = usage_msg + " by using the command './add_flow.py -f filename'\n"
+
+
+ # app.debug = False;
+
+ # Usage info
+ if len(sys.argv) > 1 and (sys.argv[1] == "-h" or sys.argv[1] == "--help"):
+ print(usage_msg)
+ exit(0)
+
+ # Check arguments
+ if len(sys.argv) < 3:
+ log_error(usage_msg)
+ exit(1)
+
+ # Extract the arguments
+ begin_flow_id = int(sys.argv[1], 0)
+ end_flow_id = int(sys.argv[2], 0)
+ if begin_flow_id > end_flow_id:
+ log_error(usage_msg)
+ exit(1)
+
+ #
+ # Do the work
+ #
+ # NOTE: Currently, up to 65536 flows are supported.
+ # More flows can be supported by iterating by, say, iterating over some of
+ # the other bytes of the autogenereated source/destination MAC addresses.
+ #
+ flow_id = begin_flow_id
+ idx = 0
+ while flow_id <= end_flow_id:
+ mac3 = idx / 255
+ mac4 = idx % 255
+ str_mac3 = "%0.2x" % mac3
+ str_mac4 = "%0.2x" % mac4
+ src_mac = "00:00:" + str_mac3 + ":" + str_mac4 + ":00:00";
+ dst_mac = "00:01:" + str_mac3 + ":" + str_mac4 + ":00:00";
+ print "%s FOOBAR 00:00:00:00:00:00:00:01 1 00:00:00:00:00:00:00:01 2 matchSrcMac %s matchDstMac %s" % (flow_id, src_mac, dst_mac)
+ flow_id = flow_id + 1
+ idx = idx + 1