X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=nfvbench%2Ftraffic_client.py;h=062d414d8937e28f205b31b42574dda5d6461d20;hb=423f360415e2834dd8de065434023b822e2ca3f8;hp=810f7dd7c0600a9ac677f73dc651384f8d399982;hpb=cd455c418173a978f89bdbb83f79d15c5fa53e03;p=nfvbench.git diff --git a/nfvbench/traffic_client.py b/nfvbench/traffic_client.py index 810f7dd..062d414 100755 --- a/nfvbench/traffic_client.py +++ b/nfvbench/traffic_client.py @@ -23,33 +23,35 @@ from attrdict import AttrDict import bitmath from netaddr import IPNetwork # pylint: disable=import-error -from trex_stl_lib.api import STLError +from trex.stl.api import Ether +from trex.stl.api import STLError +from trex.stl.api import UDP +# pylint: disable=wrong-import-order +from scapy.contrib.mpls import MPLS # flake8: noqa +# pylint: enable=wrong-import-order # pylint: enable=import-error -from log import LOG -from packet_stats import InterfaceStats -from packet_stats import PacketPathStats -from stats_collector import IntervalCollector -from stats_collector import IterationCollector -import traffic_gen.traffic_utils as utils -from utils import cast_integer - +from .log import LOG +from .packet_stats import InterfaceStats +from .packet_stats import PacketPathStats +from .stats_collector import IntervalCollector +from .stats_collector import IterationCollector +from .traffic_gen import traffic_utils as utils +from .utils import cast_integer class TrafficClientException(Exception): """Generic traffic client exception.""" - pass - - class TrafficRunner(object): """Serialize various steps required to run traffic.""" - def __init__(self, client, duration_sec, interval_sec=0): + def __init__(self, client, duration_sec, interval_sec=0, service_mode=False): """Create a traffic runner.""" self.client = client self.start_time = None self.duration_sec = duration_sec self.interval_sec = interval_sec + self.service_mode = service_mode def run(self): """Clear stats and instruct the traffic generator to start generating traffic.""" @@ -57,6 +59,10 @@ class TrafficRunner(object): return None LOG.info('Running traffic generator') self.client.gen.clear_stats() + # Debug use only : new '--service-mode' option available for the NFVBench command line. + # A read-only mode TRex console would be able to capture the generated traffic. + self.client.gen.set_service_mode(enabled=self.service_mode) + LOG.info('Service mode is %sabled', 'en' if self.service_mode else 'dis') self.client.gen.start_traffic() self.start_time = time.time() return self.poll_stats() @@ -144,17 +150,29 @@ class Device(object): identified as port 0 or port 1. """ - def __init__(self, port, generator_config, vtep_vlan=None): + def __init__(self, port, generator_config): """Create a new device for a given port.""" self.generator_config = generator_config self.chain_count = generator_config.service_chain_count self.flow_count = generator_config.flow_count / 2 self.port = port self.switch_port = generator_config.interfaces[port].get('switch_port', None) - self.vtep_vlan = vtep_vlan + self.vtep_vlan = None + self.vtep_src_mac = None + self.vxlan = False + self.mpls = False + self.inner_labels = None + self.outer_labels = None self.pci = generator_config.interfaces[port].pci self.mac = None self.dest_macs = None + self.vtep_dst_mac = None + self.vtep_dst_ip = None + if generator_config.vteps is None: + self.vtep_src_ip = None + else: + self.vtep_src_ip = generator_config.vteps[port] + self.vnis = None self.vlans = None self.ip_addrs = generator_config.ip_addrs[port] subnet = IPNetwork(self.ip_addrs) @@ -181,6 +199,15 @@ class Device(object): """Get the peer device (device 0 -> device 1, or device 1 -> device 0).""" return self.generator_config.devices[1 - self.port] + def set_vtep_dst_mac(self, dest_macs): + """Set the list of dest MACs indexed by the chain id. + + This is only called in 2 cases: + - VM macs discovered using openstack API + - dest MACs provisioned in config file + """ + self.vtep_dst_mac = list(map(str, dest_macs)) + def set_dest_macs(self, dest_macs): """Set the list of dest MACs indexed by the chain id. @@ -188,7 +215,7 @@ class Device(object): - VM macs discovered using openstack API - dest MACs provisioned in config file """ - self.dest_macs = map(str, dest_macs) + self.dest_macs = list(map(str, dest_macs)) def get_dest_macs(self): """Get the list of dest macs for this device. @@ -206,6 +233,43 @@ class Device(object): self.vlans = vlans LOG.info("Port %d: VLANs %s", self.port, self.vlans) + def set_vtep_vlan(self, vlan): + """Set the vtep vlan to use indexed by specific port.""" + self.vtep_vlan = vlan + self.vxlan = True + self.vlan_tagging = None + LOG.info("Port %d: VTEP VLANs %s", self.port, self.vtep_vlan) + + def set_vxlan_endpoints(self, src_ip, dst_ip): + self.vtep_dst_ip = dst_ip + self.vtep_src_ip = src_ip + LOG.info("Port %d: src_vtep %s, dst_vtep %s", self.port, + self.vtep_src_ip, self.vtep_dst_ip) + + def set_mpls_peers(self, src_ip, dst_ip): + self.mpls = True + self.vtep_dst_ip = dst_ip + self.vtep_src_ip = src_ip + LOG.info("Port %d: src_mpls_vtep %s, mpls_peer_ip %s", self.port, + self.vtep_src_ip, self.vtep_dst_ip) + + def set_vxlans(self, vnis): + self.vnis = vnis + LOG.info("Port %d: VNIs %s", self.port, self.vnis) + + def set_mpls_inner_labels(self, labels): + self.inner_labels = labels + LOG.info("Port %d: MPLS Inner Labels %s", self.port, self.inner_labels) + + def set_mpls_outer_labels(self, labels): + self.outer_labels = labels + LOG.info("Port %d: MPLS Outer Labels %s", self.port, self.outer_labels) + + def set_gw_ip(self, gateway_ip): + self.gw_ip_block = IpBlock(gateway_ip, + self.generator_config.gateway_ip_addrs_step, + self.chain_count) + def get_gw_ip(self, chain_index): """Retrieve the IP address assigned for the gateway of a given chain.""" return self.gw_ip_block.get_ip(chain_index) @@ -222,14 +286,14 @@ class Device(object): # calculated as (total_flows + chain_count - 1) / chain_count # - the first chain will have the remainder # example 11 flows and 3 chains => 3, 4, 4 - flows_per_chain = (self.flow_count + self.chain_count - 1) / self.chain_count - cur_chain_flow_count = self.flow_count - flows_per_chain * (self.chain_count - 1) + flows_per_chain = int((self.flow_count + self.chain_count - 1) / self.chain_count) + cur_chain_flow_count = int(self.flow_count - flows_per_chain * (self.chain_count - 1)) peer = self.get_peer_device() self.ip_block.reset_reservation() peer.ip_block.reset_reservation() dest_macs = self.get_dest_macs() - for chain_idx in xrange(self.chain_count): + for chain_idx in range(self.chain_count): src_ip_first, src_ip_last = self.ip_block.reserve_ip_range(cur_chain_flow_count) dst_ip_first, dst_ip_last = peer.ip_block.reserve_ip_range(cur_chain_flow_count) @@ -249,7 +313,18 @@ class Device(object): 'mac_discovery_gw': self.get_gw_ip(chain_idx), 'ip_src_tg_gw': self.tg_gw_ip_block.get_ip(chain_idx), 'ip_dst_tg_gw': peer.tg_gw_ip_block.get_ip(chain_idx), - 'vlan_tag': self.vlans[chain_idx] if self.vlans else None + 'vlan_tag': self.vlans[chain_idx] if self.vlans else None, + 'vxlan': self.vxlan, + 'vtep_vlan': self.vtep_vlan if self.vtep_vlan else None, + 'vtep_src_mac': self.mac if (self.vxlan or self.mpls) else None, + 'vtep_dst_mac': self.vtep_dst_mac if (self.vxlan or self.mpls) else None, + 'vtep_dst_ip': self.vtep_dst_ip if self.vxlan is True else None, + 'vtep_src_ip': self.vtep_src_ip if self.vxlan is True else None, + 'net_vni': self.vnis[chain_idx] if self.vxlan is True else None, + 'mpls': self.mpls, + 'mpls_outer_label': self.outer_labels[chain_idx] if self.mpls is True else None, + 'mpls_inner_label': self.inner_labels[chain_idx] if self.mpls is True else None + }) # after first chain, fall back to the flow count for all other chains cur_chain_flow_count = flows_per_chain @@ -263,7 +338,7 @@ class Device(object): @staticmethod def int_to_ip(nvalue): """Convert an IP address from numeric to string.""" - return socket.inet_ntoa(struct.pack("!I", nvalue)) + return socket.inet_ntoa(struct.pack("!I", int(nvalue))) class GeneratorConfig(object): @@ -286,18 +361,28 @@ class GeneratorConfig(object): # copy over fields from the dict self.tool = gen_config.tool self.ip = gen_config.ip - self.cores = gen_config.get('cores', 1) + # overrides on config.cores and config.mbuf_factor + if config.cores: + self.cores = config.cores + else: + self.cores = gen_config.get('cores', 1) + self.mbuf_factor = config.mbuf_factor + self.mbuf_64 = config.mbuf_64 + self.hdrh = not config.disable_hdrh if gen_config.intf_speed: # interface speed is overriden from config self.intf_speed = bitmath.parse_string(gen_config.intf_speed.replace('ps', '')).bits else: # interface speed is discovered/provided by the traffic generator self.intf_speed = 0 + self.name = gen_config.name + self.zmq_pub_port = gen_config.get('zmq_pub_port', 4500) + self.zmq_rpc_port = gen_config.get('zmq_rpc_port', 4501) + self.limit_memory = gen_config.get('limit_memory', 1024) self.software_mode = gen_config.get('software_mode', False) self.interfaces = gen_config.interfaces if self.interfaces[0].port != 0 or self.interfaces[1].port != 1: raise TrafficClientException('Invalid port order/id in generator_profile.interfaces') - self.service_chain = config.service_chain self.service_chain_count = config.service_chain_count self.flow_count = config.flow_count @@ -312,6 +397,7 @@ class GeneratorConfig(object): self.gateway_ips = gen_config.gateway_ip_addrs self.udp_src_port = gen_config.udp_src_port self.udp_dst_port = gen_config.udp_dst_port + self.vteps = gen_config.get('vteps') self.devices = [Device(port, self) for port in [0, 1]] # This should normally always be [0, 1] self.ports = [device.port for device in self.devices] @@ -338,12 +424,25 @@ class GeneratorConfig(object): port_index: the port for which dest macs must be set dest_macs: a list of dest MACs indexed by chain id """ - if len(dest_macs) != self.config.service_chain_count: + if len(dest_macs) < self.config.service_chain_count: raise TrafficClientException('Dest MAC list %s must have %d entries' % (dest_macs, self.config.service_chain_count)) - self.devices[port_index].set_dest_macs(dest_macs) + # only pass the first scc dest MACs + self.devices[port_index].set_dest_macs(dest_macs[:self.config.service_chain_count]) LOG.info('Port %d: dst MAC %s', port_index, [str(mac) for mac in dest_macs]) + def set_vtep_dest_macs(self, port_index, dest_macs): + """Set the list of dest MACs indexed by the chain id on given port. + + port_index: the port for which dest macs must be set + dest_macs: a list of dest MACs indexed by chain id + """ + if len(dest_macs) != self.config.service_chain_count: + raise TrafficClientException('Dest MAC list %s must have %d entries' % + (dest_macs, self.config.service_chain_count)) + self.devices[port_index].set_vtep_dst_mac(dest_macs) + LOG.info('Port %d: vtep dst MAC %s', port_index, {str(mac) for mac in dest_macs}) + def get_dest_macs(self): """Return the list of dest macs indexed by port.""" return [dev.get_dest_macs() for dev in self.devices] @@ -359,6 +458,51 @@ class GeneratorConfig(object): (vlans, self.config.service_chain_count)) self.devices[port_index].set_vlans(vlans) + def set_vxlans(self, port_index, vxlans): + """Set the list of vxlans (VNIs) to use indexed by the chain id on given port. + + port_index: the port for which VXLANs must be set + VXLANs: a list of VNIs lists indexed by chain id + """ + if len(vxlans) != self.config.service_chain_count: + raise TrafficClientException('VXLAN list %s must have %d entries' % + (vxlans, self.config.service_chain_count)) + self.devices[port_index].set_vxlans(vxlans) + + def set_mpls_inner_labels(self, port_index, labels): + """Set the list of MPLS Labels to use indexed by the chain id on given port. + + port_index: the port for which Labels must be set + Labels: a list of Labels lists indexed by chain id + """ + if len(labels) != self.config.service_chain_count: + raise TrafficClientException('Inner MPLS list %s must have %d entries' % + (labels, self.config.service_chain_count)) + self.devices[port_index].set_mpls_inner_labels(labels) + + def set_mpls_outer_labels(self, port_index, labels): + """Set the list of MPLS Labels to use indexed by the chain id on given port. + + port_index: the port for which Labels must be set + Labels: a list of Labels lists indexed by chain id + """ + if len(labels) != self.config.service_chain_count: + raise TrafficClientException('Outer MPLS list %s must have %d entries' % + (labels, self.config.service_chain_count)) + self.devices[port_index].set_mpls_outer_labels(labels) + + def set_vtep_vlan(self, port_index, vlan): + """Set the vtep vlan to use indexed by the chain id on given port. + port_index: the port for which VLAN must be set + """ + self.devices[port_index].set_vtep_vlan(vlan) + + def set_vxlan_endpoints(self, port_index, src_ip, dst_ip): + self.devices[port_index].set_vxlan_endpoints(src_ip, dst_ip) + + def set_mpls_peers(self, port_index, src_ip, dst_ip): + self.devices[port_index].set_mpls_peers(src_ip, dst_ip) + @staticmethod def __match_generator_profile(traffic_generator, generator_profile): gen_config = AttrDict(traffic_generator) @@ -393,7 +537,8 @@ class TrafficClient(object): self.notifier = notifier self.interval_collector = None self.iteration_collector = None - self.runner = TrafficRunner(self, self.config.duration_sec, self.config.interval_sec) + self.runner = TrafficRunner(self, self.config.duration_sec, self.config.interval_sec, + self.config.service_mode) self.config.frame_sizes = self._get_frame_sizes() self.run_config = { 'l2frame_size': None, @@ -413,10 +558,10 @@ class TrafficClient(object): def _get_generator(self): tool = self.tool.lower() if tool == 'trex': - from traffic_gen import trex - return trex.TRex(self) + from .traffic_gen import trex_gen + return trex_gen.TRex(self) if tool == 'dummy': - from traffic_gen import dummy + from .traffic_gen import dummy return dummy.DummyTG(self) raise TrafficClientException('Unsupported generator tool name:' + self.tool) @@ -434,7 +579,7 @@ class TrafficClient(object): if len(matching_profiles) > 1: raise TrafficClientException('Multiple traffic profiles with name: ' + traffic_profile_name) - elif not matching_profiles: + if not matching_profiles: raise TrafficClientException('Cannot find traffic profile: ' + traffic_profile_name) return matching_profiles[0].l2frame_size @@ -463,7 +608,6 @@ class TrafficClient(object): def setup(self): """Set up the traffic client.""" - self.gen.set_mode() self.gen.clear_stats() def get_version(self): @@ -492,11 +636,11 @@ class TrafficClient(object): LOG.info('Starting traffic generator to ensure end-to-end connectivity') # send 2pps on each chain and each direction rate_pps = {'rate_pps': str(self.config.service_chain_count * 2)} - self.gen.create_traffic('64', [rate_pps, rate_pps], bidirectional=True, latency=False) - + self.gen.create_traffic('64', [rate_pps, rate_pps], bidirectional=True, latency=False, + e2e=True) # ensures enough traffic is coming back - retry_count = (self.config.check_traffic_time_sec + - self.config.generic_poll_sec - 1) / self.config.generic_poll_sec + retry_count = int((self.config.check_traffic_time_sec + + self.config.generic_poll_sec - 1) / self.config.generic_poll_sec) # we expect to see packets coming from 2 unique MAC per chain # because there can be flooding in the case of shared net @@ -508,7 +652,16 @@ class TrafficClient(object): for chain, mac in enumerate(dest_macs): mac_map[mac] = (port, chain) unique_src_mac_count = len(mac_map) - for it in xrange(retry_count): + if self.config.vxlan and self.config.traffic_generator.vtep_vlan: + get_mac_id = lambda packet: packet['binary'][60:66] + elif self.config.vxlan: + get_mac_id = lambda packet: packet['binary'][56:62] + elif self.config.mpls: + get_mac_id = lambda packet: packet['binary'][24:30] + # mpls_transport_label = lambda packet: packet['binary'][14:18] + else: + get_mac_id = lambda packet: packet['binary'][6:12] + for it in range(retry_count): self.gen.clear_stats() self.gen.start_traffic() self.gen.start_capture() @@ -520,29 +673,52 @@ class TrafficClient(object): self.gen.stop_traffic() self.gen.fetch_capture_packets() self.gen.stop_capture() - for packet in self.gen.packet_list: - src_mac = packet['binary'][6:12] - src_mac = ':'.join(["%02x" % ord(x) for x in src_mac]) - if src_mac in mac_map: - port, chain = mac_map[src_mac] - LOG.info('Received packet from mac: %s (chain=%d, port=%d)', - src_mac, chain, port) - mac_map.pop(src_mac, None) + mac_id = get_mac_id(packet).decode('latin-1') + src_mac = ':'.join(["%02x" % ord(x) for x in mac_id]) + if self.config.mpls: + if src_mac in mac_map and self.is_mpls(packet): + port, chain = mac_map[src_mac] + LOG.info('Received mpls packet from mac: %s (chain=%d, port=%d)', + src_mac, chain, port) + mac_map.pop(src_mac, None) + else: + if src_mac in mac_map and self.is_udp(packet): + port, chain = mac_map[src_mac] + LOG.info('Received udp packet from mac: %s (chain=%d, port=%d)', + src_mac, chain, port) + mac_map.pop(src_mac, None) if not mac_map: LOG.info('End-to-end connectivity established') return - + if self.config.l3_router and not self.config.no_arp: + # In case of L3 traffic mode, routers are not able to route traffic + # until VM interfaces are up and ARP requests are done + LOG.info('Waiting for loopback service completely started...') + LOG.info('Sending ARP request to assure end-to-end connectivity established') + self.ensure_arp_successful() raise TrafficClientException('End-to-end connectivity cannot be ensured') + def is_udp(self, packet): + pkt = Ether(packet['binary']) + return UDP in pkt + + def is_mpls(self, packet): + pkt = Ether(packet['binary']) + return MPLS in pkt + def ensure_arp_successful(self): """Resolve all IP using ARP and throw an exception in case of failure.""" dest_macs = self.gen.resolve_arp() if dest_macs: # all dest macs are discovered, saved them into the generator config - self.generator_config.set_dest_macs(0, dest_macs[0]) - self.generator_config.set_dest_macs(1, dest_macs[1]) + if self.config.vxlan or self.config.mpls: + self.generator_config.set_vtep_dest_macs(0, dest_macs[0]) + self.generator_config.set_vtep_dest_macs(1, dest_macs[1]) + else: + self.generator_config.set_dest_macs(0, dest_macs[0]) + self.generator_config.set_dest_macs(1, dest_macs[1]) else: raise TrafficClientException('ARP cannot be resolved') @@ -563,7 +739,11 @@ class TrafficClient(object): self.run_config['rates'][idx] = {'rate_pps': self.__convert_rates(rate)['rate_pps']} self.gen.clear_streamblock() - self.gen.create_traffic(frame_size, self.run_config['rates'], bidirectional, latency=True) + + if self.config.no_latency_streams: + LOG.info("Latency streams are disabled") + self.gen.create_traffic(frame_size, self.run_config['rates'], bidirectional, + latency=not self.config.no_latency_streams) def _modify_load(self, load): self.current_total_rate = {'rate_percent': str(load)} @@ -622,29 +802,29 @@ class TrafficClient(object): """Collect final stats for previous run.""" stats = self.gen.get_stats() retDict = {'total_tx_rate': stats['total_tx_rate']} - for port in self.PORTS: - retDict[port] = {'tx': {}, 'rx': {}} tx_keys = ['total_pkts', 'total_pkt_bytes', 'pkt_rate', 'pkt_bit_rate'] rx_keys = tx_keys + ['dropped_pkts'] for port in self.PORTS: + port_stats = {'tx': {}, 'rx': {}} for key in tx_keys: - retDict[port]['tx'][key] = int(stats[port]['tx'][key]) + port_stats['tx'][key] = int(stats[port]['tx'][key]) for key in rx_keys: try: - retDict[port]['rx'][key] = int(stats[port]['rx'][key]) + port_stats['rx'][key] = int(stats[port]['rx'][key]) except ValueError: - retDict[port]['rx'][key] = 0 - retDict[port]['rx']['avg_delay_usec'] = cast_integer( + port_stats['rx'][key] = 0 + port_stats['rx']['avg_delay_usec'] = cast_integer( stats[port]['rx']['avg_delay_usec']) - retDict[port]['rx']['min_delay_usec'] = cast_integer( + port_stats['rx']['min_delay_usec'] = cast_integer( stats[port]['rx']['min_delay_usec']) - retDict[port]['rx']['max_delay_usec'] = cast_integer( + port_stats['rx']['max_delay_usec'] = cast_integer( stats[port]['rx']['max_delay_usec']) - retDict[port]['drop_rate_percent'] = self.__get_dropped_rate(retDict[port]) + port_stats['drop_rate_percent'] = self.__get_dropped_rate(port_stats) + retDict[str(port)] = port_stats - ports = sorted(retDict.keys()) + ports = sorted(list(retDict.keys()), key=str) if self.run_config['bidirectional']: retDict['overall'] = {'tx': {}, 'rx': {}} for key in tx_keys: @@ -685,6 +865,7 @@ class TrafficClient(object): def __format_output_stats(self, stats): for key in self.PORTS + ['overall']: + key = str(key) interface = stats[key] stats[key] = { 'tx_pkts': interface['tx']['total_pkts'], @@ -699,7 +880,7 @@ class TrafficClient(object): return stats def __targets_found(self, rate, targets, results): - for tag, target in targets.iteritems(): + for tag, target in list(targets.items()): LOG.info('Found %s (%s) load: %s', tag, target, rate) self.__ndr_pdr_found(tag, rate) results[tag]['timestamp_sec'] = time.time() @@ -735,7 +916,7 @@ class TrafficClient(object): # Split target dicts based on the avg drop rate left_targets = {} right_targets = {} - for tag, target in targets.iteritems(): + for tag, target in list(targets.items()): if stats['overall']['drop_rate_percent'] <= target: # record the best possible rate found for this target results[tag] = rates @@ -868,8 +1049,8 @@ class TrafficClient(object): # because we want each direction to have the far end RX rates, # use the far end index (1-idx) to retrieve the RX rates for idx, key in enumerate(["direction-forward", "direction-reverse"]): - tx_rate = results["stats"][idx]["tx"]["total_pkts"] / self.config.duration_sec - rx_rate = results["stats"][1 - idx]["rx"]["total_pkts"] / self.config.duration_sec + tx_rate = results["stats"][str(idx)]["tx"]["total_pkts"] / self.config.duration_sec + rx_rate = results["stats"][str(1 - idx)]["rx"]["total_pkts"] / self.config.duration_sec r[key] = { "orig": self.__convert_rates(self.run_config['rates'][idx]), "tx": self.__convert_rates({'rate_pps': tx_rate}), @@ -880,7 +1061,7 @@ class TrafficClient(object): for direction in ['orig', 'tx', 'rx']: total[direction] = {} for unit in ['rate_percent', 'rate_bps', 'rate_pps']: - total[direction][unit] = sum([float(x[direction][unit]) for x in r.values()]) + total[direction][unit] = sum([float(x[direction][unit]) for x in list(r.values())]) r['direction-total'] = total return r @@ -937,7 +1118,29 @@ class TrafficClient(object): # interface stats for the pps because it could have been modified to contain # additional interface stats self.gen.get_stream_stats(stats, ifs, self.pps_list[chain_idx].latencies, chain_idx) - + # special handling for vxlan + # in case of vxlan, flow stats are not available so all rx counters will be + # zeros when the total rx port counter is non zero. + # in that case, + for port in range(2): + total_rx = 0 + for ifs in self.ifstats: + total_rx += ifs[port].rx + if total_rx == 0: + # check if the total port rx from Trex is also zero + port_rx = stats[port]['rx']['total_pkts'] + if port_rx: + # the total rx for all chains from port level stats is non zero + # which means that the per-chain stats are not available + if len(self.ifstats) == 1: + # only one chain, simply report the port level rx to the chain rx stats + self.ifstats[0][port].rx = port_rx + else: + for ifs in self.ifstats: + # mark this data as unavailable + ifs[port].rx = None + # pitch in the total rx only in the last chain pps + self.ifstats[-1][port].rx_total = port_rx @staticmethod def compare_tx_rates(required, actual):