NSB: fix trex config to use dpdk port number

From some reason Heat/Neutron is now creating
interfaces such that xe0 and xe1 are swapped.

xe0  fa:16:3e:38:c7:66  0000:00:05.0
xe1  fa:16:3e:2f:f3:e2  0000:00:03.0

this causes the DPDK port numbering to be swapped.

xe0 is DPDK port 1 because it has higher PCI address
xe1 is DPDK port 0 because it has lower PCI address.

The VNF is configured correctly because it uses DPDK port numbers,
whereas TRex was using interface list ordering.

Modify trex_cfg.yaml to use DPDK port ordering.  This also
requires running generate_cfg() after setup() in instantiate()

+------------------------------------+-------------------+------------------------------+--------+
| Name                               | MAC Address       | Fixed IP Addresses           | Status |
+------------------------------------+-------------------+------------------------------+--------+
| vnf_0.yardstick-af5ccb47-xe0-port  | fa:16:3e:66:a5:e4 | ip_address='10.1.0.7',       | ACTIVE |
| vnf_0.yardstick-af5ccb47-mgmt-port | fa:16:3e:fa:98:fe | ip_address='10.0.1.10',      | ACTIVE |
| tg_0.yardstick-af5ccb47-xe1-port   | fa:16:3e:2f:f3:e2 | ip_address='10.1.1.9',       | ACTIVE |
| vnf_0.yardstick-af5ccb47-xe1-port  | fa:16:3e:f3:1d:f5 | ip_address='10.1.1.4',       | ACTIVE |
|                                    | fa:16:3e:e3:8c:65 | ip_address='10.0.1.1',       | ACTIVE |
|                                    | fa:16:3e:ff:d1:b7 | ip_address='11.191.14.110',  | N/A    |
| tg_0.yardstick-af5ccb47-xe0-port   | fa:16:3e:38:c7:66 | ip_address='10.1.0.8',       | ACTIVE |
|                                    | fa:16:3e:ff:53:5f | ip_address='11.191.14.101',  | DOWN   |
|                                    | fa:16:3e:23:5d:2c | ip_address='10.0.1.2',       | ACTIVE |
| tg_0.yardstick-af5ccb47-mgmt-port  | fa:16:3e:7a:df:4e | ip_address='10.0.1.5',       | ACTIVE |
|                                    | fa:16:3e:22:65:36 | ip_address='11.191.14.109',  | N/A    |
+------------------------------------+-------------------+------------------------------+--------+

/sys/devices/pci0000:00/0000:00:03.0/virtio0/net/ens3/address:fa:16:3e:2f:f3:e2
/sys/devices/pci0000:00/0000:00:05.0/virtio2/net/ens5/address:fa:16:3e:38:c7:66

Change-Id: Iaef2c7d9a5af7f45bd805a8ad6ee545ce0495cb1
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

2 files changed, 16 insertions, 12 deletions

diff --git a/yardstick/network_services/vnf_generic/vnf/sample_vnf.py b/yardstick/network_services/vnf_generic/vnf/sample_vnf.py
index b5cf03477..08ec44f65 100644
--- a/yardstick/network_services/vnf_generic/vnf/sample_vnf.py
+++ b/yardstick/network_services/vnf_generic/vnf/sample_vnf.py
@@ -924,8 +924,9 @@ class SampleVNFTrafficGen(GenericTrafficGen):
 
     def instantiate(self, scenario_cfg, context_cfg):
         self.scenario_helper.scenario_cfg = scenario_cfg
-        self.resource_helper.generate_cfg()
         self.resource_helper.setup()
+        # must generate_cfg after DPDK bind because we need port number
+        self.resource_helper.generate_cfg()
 
         LOG.info("Starting %s server...", self.APP_NAME)
         name = "{}-{}-{}".format(self.name, self.APP_NAME, os.getpid())
diff --git a/yardstick/network_services/vnf_generic/vnf/tg_trex.py b/yardstick/network_services/vnf_generic/vnf/tg_trex.py
index fe435f63e..458f1b844 100644
--- a/yardstick/network_services/vnf_generic/vnf/tg_trex.py
+++ b/yardstick/network_services/vnf_generic/vnf/tg_trex.py
@@ -49,30 +49,33 @@ class TrexResourceHelper(ClientResourceHelper):
     SYNC_PORT = 4501
 
     def generate_cfg(self):
-        ext_intf = self.vnfd_helper.interfaces
+        port_names = self.vnfd_helper.port_pairs.all_ports
         vpci_list = []
         port_list = []
-        trex_cfg = {
-            'interfaces': vpci_list,
-            'port_info': port_list,
-            "port_limit": len(ext_intf),
-            "version": '2',
-        }
-        cfg_file = [trex_cfg]
 
-        for interface in ext_intf:
+        port_nums = sorted(self.vnfd_helper.port_nums(port_names))
+        for port_num in port_nums:
+            interface = self.vnfd_helper.find_interface_by_port(port_num)
             virtual_interface = interface['virtual-interface']
-            vpci_list.append(virtual_interface["vpci"])
             dst_mac = virtual_interface["dst_mac"]
 
+            # why skip?, ordering is based on DPDK port number so we can't skip
             if not dst_mac:
                 continue
-
+            # TRex ports must be in DPDK port number, so order of append matters
+            vpci_list.append(virtual_interface["vpci"])
             local_mac = virtual_interface["local_mac"]
             port_list.append({
                 "src_mac": mac_address_to_hex_list(local_mac),
                 "dest_mac": mac_address_to_hex_list(dst_mac),
             })
+        trex_cfg = {
+            'interfaces': vpci_list,
+            'port_info': port_list,
+            "port_limit": len(port_names),
+            "version": '2',
+        }
+        cfg_file = [trex_cfg]
 
         cfg_str = yaml.safe_dump(cfg_file, default_flow_style=False, explicit_start=True)
         self.ssh_helper.upload_config_file(os.path.basename(self.CONF_FILE), cfg_str)