cli: Modify configuration via CLI

In the past, only a few configuration parameters could be
modified via --test-params CLI argument and it was not easy
to find out their complete list.
This patch adds support for generic modification of any
configuration parameter via CLI argument --test-params
or by "Parameters" section of testcase definition.
Thus it is possible to customize a vsperf configuration
environment per testcase or for each vsperf execution.
Old CLI parameters duration, pkt_sizes, rfc2544_tests
and rfc2889_trials were renamed to TRAFFICGEN_DURATION,
TRAFFICGEN_PKT_SIZES, TRAFFICGEN_RFC2544_TESTS and
TRAFFICGEN_RFC2889_TRIALS to be consistent with
other configuration parameters.

JIRA: VSPERF-375

Change-Id: I50a1f4ff7250d754aa8af0295a9c7c1be8151175
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Bill Michalowski <bmichalo@redhat.com>
Reviewed-by: Antonio Fischetti <antonio.fischetti@intel.com>
Reviewed-by: <sridhar.rao@spirent.com>

23 files changed, 257 insertions, 170 deletions

diff --git a/ci/build-vsperf.sh b/ci/build-vsperf.sh
index 637bc474..38fda03b 100755
--- a/ci/build-vsperf.sh
+++ b/ci/build-vsperf.sh
@@ -49,7 +49,7 @@ TESTCASES_MERGE="vswitch_add_del_bridge vswitch_add_del_bridges vswitch_add_del_
 TESTPARAM_MERGE="--integration"
 # DAILY - run selected TCs for defined packet sizes
 TESTCASES_DAILY='phy2phy_tput back2back phy2phy_tput_mod_vlan phy2phy_scalability pvp_tput pvp_back2back pvvp_tput pvvp_back2back'
-TESTPARAM_DAILY='--test-params pkt_sizes=64,128,512,1024,1518'
+TESTPARAM_DAILY='--test-params TRAFFICGEN_PKT_SIZES=(64,128,512,1024,1518)'
 # check if user config file exists if not then we will use default settings
 if [ -f $HOME/vsperf-${BRANCH}.conf ] ; then
     # branch specific config was found
diff --git a/conf/01_testcases.conf b/conf/01_testcases.conf
index 55cce1cf..f30c1912 100755
--- a/conf/01_testcases.conf
+++ b/conf/01_testcases.conf
@@ -115,11 +115,14 @@
 #                                  # stated in configuration files or value
 #                                  # specified on command line through --trafficgen
 #                                  # parameter.
-# "Parameters" : "pkt_sizes=512"   # Defines list of test parameters used for test
-#                                  # execution. It will override any values defined
-#                                  # by TEST_PARAMS option stated in configuration
-#                                  # files or values specified on command line through
-#                                  # --test-params parameter.
+# "Parameters" : {'TRAFFICGEN_PKT_SIZES' : (512,)}
+#                                  # Dictionary with testcase specific configuration
+#                                  # environment. Specified parameters will be modified
+#                                  # before the test execution and their original values will
+#                                  # be restored after TC finishes. This dictionary will
+#                                  # override any values defined by TEST_PARAMS option
+#                                  # stated in configuration files or values specified
+#                                  # on command line through --test-params parameter.
 # "Test Modifier": [FrameMod|Other],
 # "Dependency": [Test_Case_Name |None],
 
diff --git a/conf/03_traffic.conf b/conf/03_traffic.conf
index 8efd5aab..d7327629 100644
--- a/conf/03_traffic.conf
+++ b/conf/03_traffic.conf
@@ -34,6 +34,15 @@ TRAFFICGEN = 'Dummy'
 # Expand like this: (64, 128, 256, 512, 1024)
 TRAFFICGEN_PKT_SIZES = (64,)
 
+TRAFFICGEN_DURATION = 30
+
+TRAFFICGEN_RFC2544_TESTS = 1
+TRAFFICGEN_RFC2889_TRIALS = 1
+TRAFFICGEN_LOSSRATE = 0.0
+
+#############################
+# IXIA Configuration -- BEGIN
+
 # path to 'ixos' install path
 TRAFFICGEN_IXIA_ROOT_DIR = '/opt/ixos'
 
@@ -67,6 +76,10 @@ TRAFFICGEN_IXIA_3RD_PARTY = os.path.join(ROOT_DIR, '3rd_party/ixia')
 # default TCL script, which will be used for IXNETWORK configuration
 TRAFFICGEN_IXNET_TCL_SCRIPT = 'ixnetrfc2544.tcl'
 
+# IXIA Configuration -- END
+###########################
+
+
 ###########################################
 # Spirent TestCenter Configuration -- BEGIN
 
@@ -172,6 +185,9 @@ TRAFFICGEN_STC_VERBOSE = "True"
 # Spirent TestCenter Configuration -- END
 #########################################
 
+#############################
+# Xena Configuration -- BEGIN
+
 # Xena traffic generator connection info
 TRAFFICGEN_XENA_IP = ''
 TRAFFICGEN_XENA_PORT1 = ''
@@ -198,6 +214,9 @@ TRAFFICGEN_XENA_2544_TPUT_VALUE_RESOLUTION = '0.5'
 TRAFFICGEN_XENA_2544_TPUT_USEPASS_THRESHHOLD = 'false'
 TRAFFICGEN_XENA_2544_TPUT_PASS_THRESHHOLD = '0.0'
 
+# Xena Configuration -- END
+###########################
+
 ###################################################
 # MoonGen Configuration and Connection Info-- BEGIN
 
diff --git a/conf/04_vnf.conf b/conf/04_vnf.conf
index d3b4be4d..75f107e8 100644
--- a/conf/04_vnf.conf
+++ b/conf/04_vnf.conf
@@ -96,8 +96,6 @@ GUEST_SHARED_DRIVE_TYPE = ['scsi']
 #       'linux_bridge'  - linux bridge will be configured
 #       'buildin'       - nothing will be configured by vsperf; VM image must
 #                         ensure traffic forwarding between its interfaces
-# This configuration option can be overridden by CLI SCALAR option
-# guest_loopback, e.g. --test-params "guest_loopback=l2fwd"
 # For 2 VNFs you may use ['testpmd', 'l2fwd']
 GUEST_LOOPBACK = ['testpmd']
 
diff --git a/conf/10_custom.conf b/conf/10_custom.conf
index b3707149..38875810 100644
--- a/conf/10_custom.conf
+++ b/conf/10_custom.conf
@@ -103,7 +103,7 @@ TRAFFICGEN_MOONGEN_LINE_SPEED_GBPS = '10'
 # MoonGen Configuration and Connection Info-- END
 ###################################################
 
-#TEST_PARAMS = {'pkt_sizes':'64'}
+#TEST_PARAMS = {'TRAFFICGEN_PKT_SIZES':(64,)}
 OPNFV_INSTALLER = "Fuel"
 OPNFV_URL = "http://testresults.opnfv.org/testapi"
 PACKAGE_LIST = "src/package-list.mk"
diff --git a/conf/__init__.py b/conf/__init__.py
index 4d6f57fe..2448d390 100644
--- a/conf/__init__.py
+++ b/conf/__init__.py
@@ -29,6 +29,10 @@ import netaddr
 
 _LOGGER = logging.getLogger(__name__)
 
+# Special test parameters which are not part of standard VSPERF configuration
+_EXTRA_TEST_PARAMS = ['bidirectional', 'traffic_type', 'iload', 'tunnel_type',
+                      'multistream', 'stream_type', 'pre-installed_flows']
+
 # regex to parse configuration macros from 04_vnf.conf
 # it will select all patterns starting with # sign
 # and returns macro parameters and step
@@ -49,7 +53,13 @@ class Settings(object):
         """Return a settings item value
         """
         if attr in self.__dict__:
-            return getattr(self, attr)
+            if attr == 'TEST_PARAMS':
+                return getattr(self, attr)
+            else:
+                master_value = getattr(self, attr)
+                # Check if parameter value was overridden by CLI option
+                cli_value = get_test_param(attr, None)
+                return cli_value if cli_value else master_value
         else:
             raise AttributeError("%r object has no attribute %r" %
                                  (self.__class__, attr))
@@ -136,6 +146,24 @@ class Settings(object):
         for key in os.environ:
             setattr(self, key, os.environ[key])
 
+    def check_test_params(self):
+        """
+        Check all parameters defined inside TEST_PARAMS for their
+        existence. In case that non existing vsperf parmeter name
+        is detected, then VSPER will raise a runtime error.
+        """
+        unknown_keys = []
+        for key in settings.getValue('TEST_PARAMS'):
+            if key == 'TEST_PARAMS':
+                raise RuntimeError('It is not allowed to define TEST_PARAMS '
+                                   'as a test parameter')
+            if key not in self.__dict__ and key not in _EXTRA_TEST_PARAMS:
+                unknown_keys.append(key)
+
+        if len(unknown_keys):
+            raise RuntimeError('Test parameters contain unknown configuration '
+                               'parameter(s): {}'.format(', '.join(unknown_keys)))
+
     def check_vm_settings(self, vm_number):
         """
         Check all VM related settings starting with GUEST_ prefix.
@@ -145,15 +173,12 @@ class Settings(object):
         """
         for key in self.__dict__:
             if key.startswith('GUEST_'):
-                if (isinstance(self.__dict__[key], str) and
-                        self.__dict__[key].find('#') >= 0):
-                    self.__dict__[key] = [self.__dict__[key]]
+                value = self.getValue(key)
+                if isinstance(value, str) and value.find('#') >= 0:
                     self._expand_vm_settings(key, 1)
-                    self.__dict__[key] = self.__dict__[key][0]
 
-                if isinstance(self.__dict__[key], list):
-                    if (len(self.__dict__[key]) < vm_number or
-                            str(self.__dict__[key][0]).find('#') >= 0):
+                if isinstance(value, list):
+                    if len(value) < vm_number or str(value[0]).find('#') >= 0:
                         # expand configuration for all VMs
                         self._expand_vm_settings(key, vm_number)
 
@@ -161,7 +186,15 @@ class Settings(object):
         """
         Expand VM option with given key for given number of VMs
         """
-        master_value = self.__dict__[key][0]
+        tmp_value = self.getValue(key)
+        if isinstance(tmp_value, str):
+            scalar = True
+            master_value = tmp_value
+            tmp_value = [tmp_value]
+        else:
+            scalar = False
+            master_value = tmp_value[0]
+
         master_value_str = str(master_value)
         if master_value_str.find('#') >= 0:
             self.__dict__[key] = []
@@ -190,9 +223,12 @@ class Settings(object):
                     value = ast.literal_eval(value)
                 self.__dict__[key].append(value)
         else:
-            for vmindex in range(len(self.__dict__[key]), vm_number):
+            for vmindex in range(len(tmp_value), vm_number):
                 self.__dict__[key].append(master_value)
 
+        if scalar:
+            self.__dict__[key] = self.__dict__[key][0]
+
         _LOGGER.debug("Expanding option: %s = %s", key, self.__dict__[key])
 
     def __str__(self):
@@ -203,7 +239,11 @@ class Settings(object):
         Returns:
             A human-readable string.
         """
-        return pprint.pformat(self.__dict__)
+        tmp_dict = {}
+        for key in self.__dict__:
+            tmp_dict[key] = self.getValue(key)
+
+        return pprint.pformat(tmp_dict)
 
     #
     # validation methods used by step driven testcases
@@ -222,7 +262,6 @@ class Settings(object):
 
 settings = Settings()
 
-
 def get_test_param(key, default=None):
     """Retrieve value for test param ``key`` if available.
 
@@ -232,4 +271,17 @@ def get_test_param(key, default=None):
     :returns: Value for ``key`` if found, else ``default``.
     """
     test_params = settings.getValue('TEST_PARAMS')
-    return test_params.get(key, default) if test_params else default
+    if key in test_params:
+        if not isinstance(test_params.get(key), str):
+            return test_params.get(key)
+        else:
+            # values are passed inside string from CLI, so we must retype them accordingly
+            try:
+                return ast.literal_eval(test_params.get(key))
+            except ValueError:
+                # for backward compatibility, we have to accept strings without quotes
+                _LOGGER.warning("Adding missing quotes around string value: %s = %s",
+                                key, str(test_params.get(key)))
+                return str(test_params.get(key))
+    else:
+        return default
diff --git a/conf/integration/01_testcases.conf b/conf/integration/01_testcases.conf
index 83d420bf..a584845a 100644
--- a/conf/integration/01_testcases.conf
+++ b/conf/integration/01_testcases.conf
@@ -328,6 +328,7 @@ INTEGRATION_TESTS = [
                        "The encap and decap are performed inside the "
                        "virtual switch itself in each direction to avoid "
                        "the need of ingress overlay traffic."),
+        "Parameters": {'TRAFFICGEN_IXNET_TCL_SCRIPT' : 'ixnetrfc2544v2.tcl'},
     },
     {
         "Name": "overlay_p2p_tput",
@@ -337,6 +338,7 @@ INTEGRATION_TESTS = [
         "Tunnel Type": SUPPORTED_TUNNELING_PROTO[0],
         "Tunnel Operation": "encapsulation",
         "Description": "Overlay Encapsulation Throughput RFC2544 Test",
+        "Parameters": {'TRAFFICGEN_IXNET_TCL_SCRIPT' : 'ixnetrfc2544v2.tcl'},
     },
     {
         "Name": "overlay_p2p_cont",
@@ -346,6 +348,7 @@ INTEGRATION_TESTS = [
         "Tunnel Type": SUPPORTED_TUNNELING_PROTO[0],
         "Tunnel Operation": "encapsulation",
         "Description": "Overlay Encapsulation Continuous Stream",
+        "Parameters": {'TRAFFICGEN_IXNET_TCL_SCRIPT' : 'ixnetrfc2544v2.tcl'},
     },
     {
         "Name": "overlay_p2p_decap_tput",
@@ -355,6 +358,7 @@ INTEGRATION_TESTS = [
         "Tunnel Type": SUPPORTED_TUNNELING_PROTO[0],
         "Tunnel Operation": "decapsulation",
         "Description": "Overlay Decapsulation Throughput RFC2544 Test",
+        "Parameters": {'TRAFFICGEN_IXNET_TCL_SCRIPT' : 'ixnetrfc2544v2.tcl'},
     },
     {
         "Name": "overlay_p2p_decap_cont",
@@ -364,6 +368,7 @@ INTEGRATION_TESTS = [
         "Tunnel Type": SUPPORTED_TUNNELING_PROTO[0],
         "Tunnel Operation": "decapsulation",
         "Description": "Overlay Decapsulation Continuous Stream",
+        "Parameters": {'TRAFFICGEN_IXNET_TCL_SCRIPT' : 'ixnetrfc2544v2.tcl'},
     },
     {
         "Name": "vswitch_add_del_bridge",
@@ -747,7 +752,9 @@ INTEGRATION_TESTS = [
     {
       # Topology: 2 Parallel PVP connections
       # To run a Linux bridge as a loopback in the Guest use:
-      #     --test-params "guest_loopback=linux_bridge" --integration 2pvp_udp_dest_flows
+      #     --test-params "GUEST_LOOPBACK=['linux_bridge']" --integration 2pvp_udp_dest_flows
+      # or add "Parameters" option to the test definition:
+      #     "Parameters" : {'GUEST_LOOPBACK' : ['linux_bridge'],},
         "Name": "2pvp_udp_dest_flows",
         "Description": "Continuous TC with 2 Parallel VMs, flows on UDP Dest Port",
         "Deployment": "clean",
@@ -768,7 +775,9 @@ INTEGRATION_TESTS = [
     {
       # Topology: 4 Parallel PVP connections
       # To run a Linux bridge as a loopback in the Guest use:
-      #     --test-params "guest_loopback=linux_bridge" --integration 4pvp_udp_dest_flows
+      #     --test-params "GUEST_LOOPBACK=['linux_bridge']" --integration 4pvp_udp_dest_flows
+      # or add "Parameters" option to the test definition:
+      #     "Parameters" : {'GUEST_LOOPBACK' : ['linux_bridge'],},
         "Name": "4pvp_udp_dest_flows",
         "Description": "Continuous TC with 4 Parallel VMs, flows on UDP Dest Port",
         "Deployment": "clean",
@@ -793,7 +802,9 @@ INTEGRATION_TESTS = [
     {
       # Topology: 6 Parallel PVP connections
       # To run a Linux bridge as a loopback in the Guest use:
-      #     --test-params "guest_loopback=linux_bridge" --integration 6pvp_udp_dest_flows
+      #     --test-params "GUEST_LOOPBACK=['linux_bridge']" --integration 6pvp_udp_dest_flows
+      # or add "Parameters" option to the test definition:
+      #     "Parameters" : {'GUEST_LOOPBACK' : ['linux_bridge'],},
         "Name": "6pvp_udp_dest_flows",
         "Description": "Continuous TC with 6 Parallel VMs, flows on UDP Dest Port",
         "Deployment": "clean",
@@ -901,7 +912,7 @@ INTEGRATION_TESTS = [
 #        "vSwitch" : "OvsVanilla",
 #        "VNF" : "QemuVirtioNet",
 #        "Trafficgen": "IxNet",
-#        "Parameters": {"guest_loopback" : "linux_bridge"},
+#        "Parameters": {"GUEST_LOOPBACK" : ["linux_bridge"],},
 #        "TestSteps": STEP_VSWITCH_PVP_FLOWS_INIT +
 #                     [
 #                        ['vnf', 'start'],
diff --git a/conf/integration/03_traffic.conf b/conf/integration/03_traffic.conf
index 0b46cea0..e78e2668 100644
--- a/conf/integration/03_traffic.conf
+++ b/conf/integration/03_traffic.conf
@@ -18,9 +18,6 @@ TRAFFICGEN_PORT2_MAC = '02:00:00:00:00:02'
 TRAFFICGEN_PORT1_IP = '1.1.1.1'
 TRAFFICGEN_PORT2_IP = '90.90.90.90'
 
-# To test VXLAN set the ff to ixnetrfc2544v2.tcl
-TRAFFICGEN_IXNET_TCL_SCRIPT = 'ixnetrfc2544v2.tcl'
-
 # VXLAN traffic item
 
 VXLAN_VNI = '99'
diff --git a/core/traffic_controller.py b/core/traffic_controller.py
index a6c1bd8d..b1911536 100644
--- a/core/traffic_controller.py
+++ b/core/traffic_controller.py
@@ -21,7 +21,6 @@ import time
 
 from core.results.results_constants import ResultsConstants
 from conf import settings
-from conf import get_test_param
 
 class TrafficController(object):
     """Base class which defines a common functionality for all traffic
@@ -41,21 +40,13 @@ class TrafficController(object):
         self._traffic_gen_class = traffic_gen_class()
         self._traffic_started = False
         self._traffic_started_call_count = 0
-        self._duration = int(get_test_param('duration', 30))
-        self._lossrate = float(get_test_param('lossrate', 0.0))
+        self._duration = int(settings.getValue('TRAFFICGEN_DURATION'))
+        self._lossrate = float(settings.getValue('TRAFFICGEN_LOSSRATE'))
+        self._packet_sizes = settings.getValue('TRAFFICGEN_PKT_SIZES')
+
         self._mode = settings.getValue('mode').lower()
         self._results = []
 
-        # If set, comma separated packet_sizes value from --test_params
-        # on cli takes precedence over value in settings file.
-        self._packet_sizes = None
-        packet_sizes_cli = get_test_param('pkt_sizes')
-        if packet_sizes_cli:
-            self._packet_sizes = [int(x.strip())
-                                  for x in packet_sizes_cli.split(',')]
-        else:
-            self._packet_sizes = settings.getValue('TRAFFICGEN_PKT_SIZES')
-
     def __enter__(self):
         """Call initialisation function.
         """
diff --git a/core/traffic_controller_rfc2544.py b/core/traffic_controller_rfc2544.py
index 874c3ae7..980205f6 100644
--- a/core/traffic_controller_rfc2544.py
+++ b/core/traffic_controller_rfc2544.py
@@ -15,7 +15,7 @@
 """
 from core.traffic_controller import TrafficController
 from core.results.results import IResults
-from conf import get_test_param
+from conf import settings
 
 
 class TrafficControllerRFC2544(TrafficController, IResults):
@@ -32,7 +32,7 @@ class TrafficControllerRFC2544(TrafficController, IResults):
         """
         super(TrafficControllerRFC2544, self).__init__(traffic_gen_class)
         self._type = 'rfc2544'
-        self._tests = int(get_test_param('rfc2544_tests', 1))
+        self._tests = int(settings.getValue('TRAFFICGEN_RFC2544_TESTS'))
 
     def send_traffic(self, traffic):
         """See TrafficController for description
@@ -85,4 +85,3 @@ class TrafficControllerRFC2544(TrafficController, IResults):
             result = self._traffic_gen_class.wait_rfc2544_throughput()
             result = self._append_results(result, packet_size)
             self._results.append(result)
-
diff --git a/core/traffic_controller_rfc2889.py b/core/traffic_controller_rfc2889.py
index a2e12e6d..210d5f5f 100644
--- a/core/traffic_controller_rfc2889.py
+++ b/core/traffic_controller_rfc2889.py
@@ -15,7 +15,7 @@
 """
 from core.traffic_controller import TrafficController
 from core.results.results import IResults
-from conf import get_test_param
+from conf import settings
 
 
 class TrafficControllerRFC2889(TrafficController, IResults):
@@ -32,7 +32,7 @@ class TrafficControllerRFC2889(TrafficController, IResults):
         """
         super(TrafficControllerRFC2889, self).__init__(traffic_gen_class)
         self._type = 'rfc2889'
-        self._trials = int(get_test_param('rfc2889_trials', 1))
+        self._trials = int(settings.getValue('TRAFFICGEN_RFC2889_TRIALS'))
 
     def send_traffic(self, traffic):
         """See TrafficController for description
@@ -83,7 +83,6 @@ class TrafficControllerRFC2889(TrafficController, IResults):
             else:
                 function['function']()
             result = self._traffic_gen_class.wait_rfc2889_forwarding(
-                        traffic, trials=self._trials, duration=self._duration)
+                traffic, trials=self._trials, duration=self._duration)
             result = self._append_results(result, packet_size)
             self._results.append(result)
-
diff --git a/docs/configguide/trafficgen.rst b/docs/configguide/trafficgen.rst
index 85fc35b8..efcc4d83 100644
--- a/docs/configguide/trafficgen.rst
+++ b/docs/configguide/trafficgen.rst
@@ -69,7 +69,7 @@ OR from the commandline:
 
 .. code-block:: console
 
-    $ ./vsperf --test-params "pkt_sizes=x,y" $TESTNAME
+    $ ./vsperf --test-params "TRAFFICGEN_PKT_SIZES=(x,y)" $TESTNAME
 
 You can also modify the traffic transmission duration and the number
 of tests run by the traffic generator by extending the example
@@ -77,7 +77,8 @@ commandline above to:
 
 .. code-block:: console
 
-    $ ./vsperf --test-params "pkt_sizes=x,y;duration=10;rfc2544_tests=1" $TESTNAME
+    $ ./vsperf --test-params "TRAFFICGEN_PKT_SIZES=(x,y);TRAFFICGEN_DURATION=10;" \
+                             "TRAFFICGEN_RFC2544_TESTS=1" $TESTNAME
 
 Dummy Setup
 ------------
diff --git a/docs/design/vswitchperf_design.rst b/docs/design/vswitchperf_design.rst
index 375fa12e..88b6ba88 100755
--- a/docs/design/vswitchperf_design.rst
+++ b/docs/design/vswitchperf_design.rst
@@ -53,7 +53,8 @@ for development purposes:
 
 .. code-block:: console
 
-   $ ./vsperf --test-params 'duration=10;rfc2544_tests=1;pkt_sizes=64' --tests 'pvp_tput'
+   $ ./vsperf --test-params 'TRAFFICGEN_DURATION=10;TRAFFICGEN_RFC2544_TESTS=1;' \
+                            'TRAFFICGEN_PKT_SIZES=(64,)' pvp_tput
 
 Typical Test Sequence
 =====================
diff --git a/docs/requirements/vswitchperf_ltp.rst b/docs/requirements/vswitchperf_ltp.rst
index 6b2ee9bc..14303de5 100644
--- a/docs/requirements/vswitchperf_ltp.rst
+++ b/docs/requirements/vswitchperf_ltp.rst
@@ -1304,7 +1304,7 @@ vsperf CI jobs are broken down into:
     * Runs everyday takes about 10 hours to complete.
     * TESTCASES_DAILY='phy2phy_tput back2back phy2phy_tput_mod_vlan
       phy2phy_scalability pvp_tput pvp_back2back pvvp_tput pvvp_back2back'.
-    * TESTPARAM_DAILY='--test-params pkt_sizes=64,128,512,1024,1518'.
+    * TESTPARAM_DAILY='--test-params TRAFFICGEN_PKT_SIZES=(64,128,512,1024,1518)'.
 
   * Merge job:
 
diff --git a/docs/userguide/integration.rst b/docs/userguide/integration.rst
index 5b26a716..003e8adb 100755
--- a/docs/userguide/integration.rst
+++ b/docs/userguide/integration.rst
@@ -81,21 +81,21 @@ To run VXLAN encapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=vxlan' overlay_p2p_tput
 
 To run GRE encapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=gre' overlay_p2p_tput
 
 To run GENEVE encapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=geneve' overlay_p2p_tput
 
 To run OVS NATIVE tunnel tests (VXLAN/GRE/GENEVE):
@@ -127,7 +127,7 @@ To run OVS NATIVE tunnel tests (VXLAN/GRE/GENEVE):
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=vxlan' overlay_p2p_tput
 
 
@@ -189,7 +189,7 @@ To run GRE decapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --test-params 'tunnel_type=gre'
+    ./vsperf --conf-file user_settings.py --test-params 'tunnel_type=gre' \
              --integration overlay_p2p_decap_cont
 
 
@@ -246,7 +246,7 @@ To run GENEVE decapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --test-params 'tunnel_type=geneve'
+    ./vsperf --conf-file user_settings.py --test-params 'tunnel_type=geneve' \
              --integration overlay_p2p_decap_cont
 
 
@@ -330,7 +330,7 @@ To run VXLAN decapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=vxlan' overlay_p2p_decap_cont
 
 Executing Native/Vanilla OVS GRE decapsulation tests
@@ -389,7 +389,7 @@ To run GRE decapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=gre' overlay_p2p_decap_cont
 
 Executing Native/Vanilla OVS GENEVE decapsulation tests
@@ -448,7 +448,7 @@ To run GENEVE decapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              --test-params 'tunnel_type=geneve' overlay_p2p_decap_cont
 
 
@@ -498,5 +498,5 @@ To run VXLAN encapsulation+decapsulation tests:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --integration
+    ./vsperf --conf-file user_settings.py --integration \
              overlay_p2p_mod_tput
diff --git a/docs/userguide/teststeps.rst b/docs/userguide/teststeps.rst
index 51e62020..65a25b0a 100644
--- a/docs/userguide/teststeps.rst
+++ b/docs/userguide/teststeps.rst
@@ -523,8 +523,8 @@ To run the test:
 
   .. code-block:: console
 
-    ./vsperf --conf-file user_settings.py --test-params
-            "guest_loopback=linux_bridge" --integration ex_pvp_rule_l3da
+    ./vsperf --conf-file user_settings.py --test-params \
+            "GUEST_LOOPBACK=['linux_bridge']" --integration ex_pvp_rule_l3da
 
 Forward packets based on UDP port
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/docs/userguide/testusage.rst b/docs/userguide/testusage.rst
index 97c74721..f446f261 100755
--- a/docs/userguide/testusage.rst
+++ b/docs/userguide/testusage.rst
@@ -105,14 +105,61 @@ or via another command line argument will override both the default and
 your custom configuration files. This "priority hierarchy" can be
 described like so (1 = max priority):
 
-1. Command line arguments
-2. Environment variables
-3. Configuration file(s)
+1. Testcase definition section ``Parameters``
+2. Command line arguments
+3. Environment variables
+4. Configuration file(s)
 
 Further details about configuration files evaluation and special behaviour
 of options with ``GUEST_`` prefix could be found at `design document
 <http://artifacts.opnfv.org/vswitchperf/docs/design/vswitchperf_design.html#configuration>`__.
 
+Overriding values defined in configuration files
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The configuration items can be overridden by command line argument
+``--test-params``. In this case, the configuration items and
+their values should be passed in form of ``item=value`` and separated
+by semicolon.
+
+Example:
+
+.. code:: console
+
+    $ ./vsperf --test-params "TRAFFICGEN_DURATION=10;TRAFFICGEN_PKT_SIZES=(128,);" \
+                             "GUEST_LOOPBACK=['testpmd','l2fwd']" pvvp_tput
+
+The second option is to override configuration items by ``Parameters`` section
+of the test case definition. The configuration items can be added into ``Parameters``
+dictionary with their new values. These values will override values defined in
+configuration files or specified by ``--test-params`` command line argument.
+
+Example:
+
+.. code:: python
+
+    "Parameters" : {'TRAFFICGEN_PKT_SIZES' : (128,),
+                    'TRAFFICGEN_DURATION' : 10,
+                    'GUEST_LOOPBACK' : ['testpmd','l2fwd'],
+                   }
+
+**NOTE:** In both cases, configuration item names and their values must be specified
+in the same form as they are defined inside configuration files. Parameter names
+must be specified in uppercase and data types of original and new value must match.
+Python syntax rules related to data types and structures must be followed.
+For example, parameter ``TRAFFICGEN_PKT_SIZES`` above is defined as a tuple
+with a single value ``128``. In this case trailing comma is mandatory, otherwise
+value can be wrongly interpreted as a number instead of a tuple and vsperf
+execution would fail. Please check configuration files for default values and their
+types and use them as a basis for any customized values. In case of any doubt, please
+check official python documentation related to data structures like tuples, lists
+and dictionaries.
+
+**NOTE:** Vsperf execution will terminate with runtime error in case, that unknown
+parameter name is passed via ``--test-params`` CLI argument or defined in ``Parameters``
+section of test case definition. It is also forbidden to redefine a value of
+``TEST_PARAMS`` configuration item via CLI or ``Parameters`` section.
+
 vloop_vnf
 ^^^^^^^^^
 
@@ -192,9 +239,9 @@ Some tests allow for configurable parameters, including test duration
 
 .. code:: bash
 
-    $ ./vsperf --conf-file user_settings.py
-        --tests RFC2544Tput
-        --test-params "duration=10;pkt_sizes=128"
+    $ ./vsperf --conf-file user_settings.py \
+        --tests RFC2544Tput \
+        --test-params "TRAFFICGEN_DURATION=10;TRAFFICGEN_PKT_SIZES=(128,)"
 
 For all available options, check out the help dialog:
 
@@ -283,9 +330,11 @@ To run tests using Vanilla OVS:
 
    .. code-block:: console
 
-       $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf
-                  --test-params "vanilla_tgen_tx_ip=n.n.n.n;
-                                 vanilla_tgen_tx_mac=nn:nn:nn:nn:nn:nn"
+       $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf \
+                  --test-params "VANILLA_TGEN_PORT1_IP=n.n.n.n;" \
+                                "VANILLA_TGEN_PORT1_MAC=nn:nn:nn:nn:nn:nn;" \
+                                "VANILLA_TGEN_PORT2_IP=n.n.n.n;" \
+                                "VANILLA_TGEN_PORT2_MAC=nn:nn:nn:nn:nn:nn"
 
 2. If needed, recompile src for all OVS variants
 
@@ -389,7 +438,7 @@ Execution of test with PCI passthrough with vswitch disabled:
 
 .. code-block:: console
 
-    $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf
+    $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf \
                --vswitch none --vnf QemuPciPassthrough pvp_tput
 
 Any of supported guest-loopback-application_ can be used inside VM with
@@ -414,8 +463,8 @@ or use ``--test-params`` CLI argument:
 
 .. code-block:: console
 
-        $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf
-              --test-params "guest_loopback=testpmd"
+        $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf \
+              --test-params "GUEST_LOOPBACK=['testpmd']"
 
 Supported loopback applications are:
 
@@ -549,15 +598,6 @@ environment.
 on the same numa as the NIC in use if possible/applicable. Testpmd should be
 assigned at least (nb_cores +1) total cores with the cpu mask.
 
-The following CLI parameters override the corresponding configuration settings:
-
-1. ``guest_nic_queues``, which overrides all ``GUEST_NIC_QUEUES`` values
-2. ``guest_testpmd_params``, which overrides all ``GUEST_TESTPMD_PARAMS``
-   values
-3. ``vswitch_dpdk_multi_queues``, which overrides ``VSWITCH_DPDK_MULTI_QUEUES``
-4. ``guest_smp``, which overrides all ``GUEST_SMP`` values
-5. ``guest_core_binding``, which overrides all ``GUEST_CORE_BINDING`` values
-
 Executing Packet Forwarding tests
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -573,8 +613,8 @@ or use ``--vswitch`` and ``--fwdapp`` CLI arguments:
 
 .. code-block:: console
 
-    $ ./vsperf --conf-file user_settings.py
-               --vswitch none
+    $ ./vsperf --conf-file user_settings.py \
+               --vswitch none \
                --fwdapp TestPMD
 
 Supported Packet Forwarding applications are:
@@ -629,7 +669,7 @@ Mode of operation is driven by configuration parameter -m or --mode
             "trafficgen-pause" - execute vSwitch and VNF but wait before traffic transmission
 
 In case, that VSPERF is executed in "trafficgen" mode, then configuration
-of traffic generator should be configured through --test-params option.
+of traffic generator should be configured through ``--test-params`` option.
 Supported CLI options useful for traffic generator configuration are:
 
 .. code-block:: console
@@ -656,7 +696,7 @@ Example of execution of VSPERF in "trafficgen" mode:
 
 .. code-block:: console
 
-    $ ./vsperf -m trafficgen --trafficgen IxNet --conf-file vsperf.conf
+    $ ./vsperf -m trafficgen --trafficgen IxNet --conf-file vsperf.conf \
         --test-params "traffic_type=continuous;bidirectional=True;iload=60"
 
 Code change verification by pylint
diff --git a/testcases/testcase.py b/testcases/testcase.py
index 00164ea2..01a07391 100644
--- a/testcases/testcase.py
+++ b/testcases/testcase.py
@@ -66,6 +66,7 @@ class TestCase(object):
         self._step_vnf_list = {}
         self._step_result = []
         self._step_status = None
+        self._testcase_run_time = None
 
         # store all GUEST_ specific settings to keep original values before their expansion
         for key in S.__dict__:
@@ -75,14 +76,21 @@ class TestCase(object):
         self._update_settings('VSWITCH', cfg.get('vSwitch', S.getValue('VSWITCH')))
         self._update_settings('VNF', cfg.get('VNF', S.getValue('VNF')))
         self._update_settings('TRAFFICGEN', cfg.get('Trafficgen', S.getValue('TRAFFICGEN')))
-        self._update_settings('TEST_PARAMS', cfg.get('Parameters', S.getValue('TEST_PARAMS')))
+        test_params = copy.deepcopy(S.getValue('TEST_PARAMS'))
+        tc_test_params = cfg.get('Parameters', S.getValue('TEST_PARAMS'))
+        test_params.update(tc_test_params)
+        self._update_settings('TEST_PARAMS', test_params)
+        S.check_test_params()
+
+        # override all redefined GUEST_ values to have them expanded correctly
+        tmp_test_params = copy.deepcopy(S.getValue('TEST_PARAMS'))
+        for key in tmp_test_params:
+            if key.startswith('GUEST_'):
+                S.setValue(key, S.getValue(key))
+                S.getValue('TEST_PARAMS').pop(key)
 
         # update global settings
         functions.settings_update_paths()
-        guest_loopback = get_test_param('guest_loopback', None)
-        if guest_loopback:
-            # we can put just one item, it'll be expanded automatically for all VMs
-            self._update_settings('GUEST_LOOPBACK', [guest_loopback])
 
         # set test parameters; CLI options take precedence to testcase settings
         self._logger = logging.getLogger(__name__)
@@ -337,7 +345,8 @@ class TestCase(object):
             self.run_finalize()
 
         self._testcase_run_time = time.strftime("%H:%M:%S",
-                                  time.gmtime(time.time() - self._testcase_start_time))
+                                                time.gmtime(time.time() -
+                                                            self._testcase_start_time))
         logging.info("Testcase execution time: " + self._testcase_run_time)
         # report test results
         self.run_report()
@@ -352,7 +361,7 @@ class TestCase(object):
         """
         orig_value = S.getValue(param)
         if orig_value != value:
-            self._settings_original[param] = orig_value
+            self._settings_original[param] = copy.deepcopy(orig_value)
             S.setValue(param, value)
 
     def _append_results(self, results):
diff --git a/tools/pkt_gen/ixnet/ixnet.py b/tools/pkt_gen/ixnet/ixnet.py
index 52ba1712..6262a10a 100755
--- a/tools/pkt_gen/ixnet/ixnet.py
+++ b/tools/pkt_gen/ixnet/ixnet.py
@@ -151,13 +151,17 @@ class IxNet(trafficgen.ITrafficGenerator):
 
     Currently only the RFC2544 tests are implemented.
     """
-    _script = os.path.join(settings.getValue('TRAFFICGEN_IXIA_3RD_PARTY'),
-                           settings.getValue('TRAFFICGEN_IXNET_TCL_SCRIPT'))
-    _tclsh = tkinter.Tcl()
-    _cfg = None
-    _logger = logging.getLogger(__name__)
-    _params = None
-    _bidir = None
+
+    def __init__(self):
+        """Initialize IXNET members
+        """
+        self._script = os.path.join(settings.getValue('TRAFFICGEN_IXIA_3RD_PARTY'),
+                                    settings.getValue('TRAFFICGEN_IXNET_TCL_SCRIPT'))
+        self._tclsh = tkinter.Tcl()
+        self._cfg = None
+        self._logger = logging.getLogger(__name__)
+        self._params = None
+        self._bidir = None
 
     def run_tcl(self, cmd):
         """Run a TCL script using the TCL interpreter found in ``tkinter``.
diff --git a/vnfs/qemu/qemu.py b/vnfs/qemu/qemu.py
index 51553277..997f93e0 100644
--- a/vnfs/qemu/qemu.py
+++ b/vnfs/qemu/qemu.py
@@ -24,7 +24,6 @@ import time
 import pexpect
 
 from conf import settings as S
-from conf import get_test_param
 from vnfs.vnf.vnf import IVnf
 
 class IVnfQemu(IVnf):
@@ -69,7 +68,6 @@ class IVnfQemu(IVnf):
         self._nics = S.getValue('GUEST_NICS')[self._number][:nics_nr]
 
         # set guest loopback application based on VNF configuration
-        # cli option take precedence to config file values
         self._guest_loopback = S.getValue('GUEST_LOOPBACK')[self._number]
 
         self._testpmd_fwd_mode = S.getValue('GUEST_TESTPMD_FWD_MODE')[self._number]
@@ -81,11 +79,6 @@ class IVnfQemu(IVnf):
                               self._testpmd_fwd_mode, 'io')
             self._testpmd_fwd_mode = 'io'
 
-        guest_smp = int(get_test_param('guest_smp', 0))
-        if guest_smp:
-            override_list = [guest_smp] * (self._number + 1)
-            S.setValue('GUEST_SMP', override_list)
-
         name = 'Client%d' % self._number
         vnc = ':%d' % self._number
         # NOTE: affinization of main qemu process can cause hangup of 2nd VM
@@ -238,18 +231,14 @@ class IVnfQemu(IVnf):
             stdin=proc.stdout)
         proc.wait()
 
-        guest_core_binding = int(get_test_param('guest_core_binding', 0))
         for cpu in range(0, int(S.getValue('GUEST_SMP')[self._number])):
             match = None
             for line in output.decode(cur_locale).split('\n'):
                 match = re.search(thread_id % cpu, line)
                 if match:
-                    if guest_core_binding:
-                        self._affinitize_pid(guest_core_binding, match.group(1))
-                    else:
-                        self._affinitize_pid(
-                            S.getValue('GUEST_CORE_BINDING')[self._number][cpu],
-                            match.group(1))
+                    self._affinitize_pid(
+                        S.getValue('GUEST_CORE_BINDING')[self._number][cpu],
+                        match.group(1))
                     break
 
             if not match:
@@ -397,10 +386,9 @@ class IVnfQemu(IVnf):
         self.execute_and_wait('make')
 
         # get testpmd settings from CLI
-        testpmd_params = get_test_param('guest_testpmd_params',
-                                        S.getValue('GUEST_TESTPMD_PARAMS')[self._number])
+        testpmd_params = S.getValue('GUEST_TESTPMD_PARAMS')[self._number]
 
-        self.execute_and_wait( './testpmd {}'.format(testpmd_params), 60, "Done")
+        self.execute_and_wait('./testpmd {}'.format(testpmd_params), 60, "Done")
         self.execute('set fwd ' + self._testpmd_fwd_mode, 1)
         self.execute_and_wait('start', 20, 'testpmd>')
 
@@ -458,17 +446,13 @@ class IVnfQemu(IVnf):
 
         # Add the arp entries for the IXIA ports and the bridge you are using.
         # Use command line values if provided.
-        trafficgen_mac = get_test_param('vanilla_tgen_port1_mac',
-                                        S.getValue('VANILLA_TGEN_PORT1_MAC'))
-        trafficgen_ip = get_test_param('vanilla_tgen_port1_ip',
-                                       S.getValue('VANILLA_TGEN_PORT1_IP'))
+        trafficgen_mac = S.getValue('VANILLA_TGEN_PORT1_MAC')
+        trafficgen_ip = S.getValue('VANILLA_TGEN_PORT1_IP')
 
         self.execute('arp -s ' + trafficgen_ip + ' ' + trafficgen_mac)
 
-        trafficgen_mac = get_test_param('vanilla_tgen_port2_mac',
-                                        S.getValue('VANILLA_TGEN_PORT2_MAC'))
-        trafficgen_ip = get_test_param('vanilla_tgen_port2_ip',
-                                       S.getValue('VANILLA_TGEN_PORT2_IP'))
+        trafficgen_mac = S.getValue('VANILLA_TGEN_PORT2_MAC')
+        trafficgen_ip = S.getValue('VANILLA_TGEN_PORT2_IP')
 
         self.execute('arp -s ' + trafficgen_ip + ' ' + trafficgen_mac)
 
diff --git a/vnfs/qemu/qemu_dpdk_vhost_user.py b/vnfs/qemu/qemu_dpdk_vhost_user.py
index a25c61ef..51c10242 100644
--- a/vnfs/qemu/qemu_dpdk_vhost_user.py
+++ b/vnfs/qemu/qemu_dpdk_vhost_user.py
@@ -18,7 +18,6 @@
 import logging
 
 from conf import settings as S
-from conf import get_test_param
 from vnfs.qemu.qemu import IVnfQemu
 
 class QemuDpdkVhostUser(IVnfQemu):
@@ -33,10 +32,6 @@ class QemuDpdkVhostUser(IVnfQemu):
         self._logger = logging.getLogger(__name__)
 
         # multi-queue values
-        guest_nic_queues = int(get_test_param('guest_nic_queues', 0))
-        if guest_nic_queues:
-            override_list = [guest_nic_queues] * (self._number + 1)
-            S.setValue('GUEST_NIC_QUEUES', override_list)
         if int(S.getValue('GUEST_NIC_QUEUES')[self._number]):
             queue_str = ',queues={}'.format(S.getValue('GUEST_NIC_QUEUES')[self._number])
             mq_vector_str = ',mq=on,vectors={}'.format(
diff --git a/vsperf b/vsperf
index 5bfa2abe..ee494dcd 100755
--- a/vsperf
+++ b/vsperf
@@ -21,6 +21,7 @@ import logging
 import os
 import sys
 import argparse
+import re
 import time
 import datetime
 import shutil
@@ -75,21 +76,19 @@ def parse_arguments():
 
         This expects either 'x=y', 'x=y,z' or 'x' (implicit true)
         values. For multiple overrides use a ; separated list for
-        e.g. --test-params 'x=z; y=a,b'
+        e.g. --test-params 'x=z; y=(a,b)'
         """
         def __call__(self, parser, namespace, values, option_string=None):
             results = {}
 
-            for value in values.split(';'):
-                result = [key.strip() for key in value.split('=')]
-                if len(result) == 1:
-                    results[result[0]] = True
-                elif len(result) == 2:
-                    results[result[0]] = result[1]
-                else:
-                    raise argparse.ArgumentTypeError(
-                        'expected \'%s\' to be of format \'key=val\' or'
-                        ' \'key\'' % result)
+            for param, _, value in re.findall('([^;=]+)(=([^;]+))?', values):
+                param = param.strip()
+                value = value.strip()
+                if len(param):
+                    if len(value):
+                        results[param] = value
+                    else:
+                        results[param] = True
 
             setattr(namespace, self.dest, results)
 
@@ -181,9 +180,9 @@ def parse_arguments():
     group.add_argument('--conf-file', action=_ValidateFileAction,
                        help='settings file')
     group.add_argument('--test-params', action=_SplitTestParamsAction,
-                       help='csv list of test parameters: key=val; e.g.'
-                       'including pkt_sizes=x,y; duration=x; '
-                       'rfc2544_tests=x ...')
+                       help='csv list of test parameters: key=val; e.g. '
+                       'TRAFFICGEN_PKT_SIZES=(64,128);TRAFICGEN_DURATION=30; '
+                       'GUEST_LOOPBACK=["l2fwd"] ...')
     group.add_argument('--opnfvpod', help='name of POD in opnfv')
 
     args = vars(parser.parse_args())
@@ -585,14 +584,6 @@ def main():
     # for backward compatibility
     settings.setValue('WHITELIST_NICS', list(nic['pci'] for nic in nic_list))
 
-    # update global settings
-    guest_loopback = get_test_param('guest_loopback', None)
-    if guest_loopback:
-        tmp_gl = []
-        for dummy_i in range(len(settings.getValue('GUEST_LOOPBACK'))):
-            tmp_gl.append(guest_loopback)
-        settings.setValue('GUEST_LOOPBACK', tmp_gl)
-
     settings.setValue('mode', args['mode'])
 
     # generate results directory name
@@ -612,11 +603,11 @@ def main():
         loader = Loader()
         # set traffic details, so they can be passed to traffic ctl
         traffic = copy.deepcopy(TRAFFIC_DEFAULTS)
-        traffic.update({'traffic_type': get_test_param('traffic_type', 'rfc2544'),
-                        'bidir': get_test_param('bidirectional', 'False'),
-                        'multistream': int(get_test_param('multistream', 0)),
-                        'stream_type': get_test_param('stream_type', 'L4'),
-                        'frame_rate': int(get_test_param('iload', 100))})
+        traffic.update({'traffic_type': get_test_param('traffic_type', TRAFFIC_DEFAULTS['traffic_type']),
+                        'bidir': get_test_param('bidirectional', TRAFFIC_DEFAULTS['bidir']),
+                        'multistream': int(get_test_param('multistream', TRAFFIC_DEFAULTS['multistream'])),
+                        'stream_type': get_test_param('stream_type', TRAFFIC_DEFAULTS['stream_type']),
+                        'frame_rate': int(get_test_param('iload', TRAFFIC_DEFAULTS['frame_rate']))})
 
         traffic_ctl = component_factory.create_traffic(
             traffic['traffic_type'],
diff --git a/vswitches/ovs_dpdk_vhost.py b/vswitches/ovs_dpdk_vhost.py
index 5beb0051..67011d20 100644
--- a/vswitches/ovs_dpdk_vhost.py
+++ b/vswitches/ovs_dpdk_vhost.py
@@ -17,12 +17,10 @@
 
 import logging
 import subprocess
-import os
 
 from src.ovs import OFBridge
 from src.dpdk import dpdk
 from conf import settings
-from conf import get_test_param
 from vswitches.ovs import IVSwitchOvs
 
 class OvsDpdkVhost(IVSwitchOvs):
@@ -70,11 +68,6 @@ class OvsDpdkVhost(IVSwitchOvs):
         dpdk.init()
         super(OvsDpdkVhost, self).start()
         # old style OVS <= 2.5.0 multi-queue enable
-        vswitch_dpdk_multi_queues = \
-            int(get_test_param('vswitch_dpdk_multi_queues', 0))
-        if vswitch_dpdk_multi_queues:
-            settings.setValue('VSWITCH_DPDK_MULTI_QUEUES', \
-                vswitch_dpdk_multi_queues)
         if settings.getValue('OVS_OLD_STYLE_MQ') and \
                 int(settings.getValue('VSWITCH_DPDK_MULTI_QUEUES')):
             tmp_br = OFBridge(timeout=-1)
@@ -120,8 +113,8 @@ class OvsDpdkVhost(IVSwitchOvs):
 
         if int(settings.getValue('VSWITCH_DPDK_MULTI_QUEUES')) and \
                 not settings.getValue('OVS_OLD_STYLE_MQ'):
-                params += ['options:n_rxq={}'.format(
-                    settings.getValue('VSWITCH_DPDK_MULTI_QUEUES'))]
+            params += ['options:n_rxq={}'.format(
+                settings.getValue('VSWITCH_DPDK_MULTI_QUEUES'))]
         of_port = bridge.add_port(port_name, params)
         return (port_name, of_port)