1 # Copyright 2016 Cisco Systems, Inc. All rights reserved.
3 # Licensed under the Apache License, Version 2.0 (the "License"); you may
4 # not use this file except in compliance with the License. You may obtain
5 # a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 # License for the specific language governing permissions and limitations
14 """Driver module for TRex traffic generator."""
22 from itertools import count
23 from nfvbench.log import LOG
24 from nfvbench.traffic_server import TRexTrafficServer
25 from nfvbench.utils import cast_integer
26 from nfvbench.utils import timeout
27 from nfvbench.utils import TimeoutError
28 from traffic_base import AbstractTrafficGenerator
29 from traffic_base import TrafficGeneratorException
30 import traffic_utils as utils
31 from traffic_utils import IMIX_AVG_L2_FRAME_SIZE
32 from traffic_utils import IMIX_L2_SIZES
33 from traffic_utils import IMIX_RATIOS
35 # pylint: disable=import-error
36 from trex.common.services.trex_service_arp import ServiceARP
37 from trex.stl.api import bind_layers
38 from trex.stl.api import CTRexVmInsFixHwCs
39 from trex.stl.api import Dot1Q
40 from trex.stl.api import Ether
41 from trex.stl.api import FlagsField
42 from trex.stl.api import IP
43 from trex.stl.api import Packet
44 from trex.stl.api import STLClient
45 from trex.stl.api import STLError
46 from trex.stl.api import STLFlowLatencyStats
47 from trex.stl.api import STLFlowStats
48 from trex.stl.api import STLPktBuilder
49 from trex.stl.api import STLScVmRaw
50 from trex.stl.api import STLStream
51 from trex.stl.api import STLTXCont
52 from trex.stl.api import STLVmFixChecksumHw
53 from trex.stl.api import STLVmFlowVar
54 from trex.stl.api import STLVmFlowVarRepeatableRandom
55 from trex.stl.api import STLVmWrFlowVar
56 from trex.stl.api import ThreeBytesField
57 from trex.stl.api import UDP
58 from trex.stl.api import XByteField
61 # pylint: enable=import-error
66 _VXLAN_FLAGS = ['R' * 27] + ['I'] + ['R' * 5]
68 fields_desc = [FlagsField("flags", 0x08000000, 32, _VXLAN_FLAGS),
69 ThreeBytesField("vni", 0),
70 XByteField("reserved", 0x00)]
74 return self.sprintf("VXLAN (vni=%VXLAN.vni%)")
76 class TRex(AbstractTrafficGenerator):
77 """TRex traffic generator driver."""
80 CHAIN_PG_ID_MASK = 0x007F
81 PORT_PG_ID_MASK = 0x0080
82 LATENCY_PG_ID_MASK = 0x0100
84 def __init__(self, traffic_client):
86 AbstractTrafficGenerator.__init__(self, traffic_client)
90 self.chain_count = self.generator_config.service_chain_count
92 self.capture_id = None
95 def get_version(self):
96 """Get the Trex version."""
97 return self.client.get_server_version() if self.client else ''
99 def get_pg_id(self, port, chain_id):
100 """Calculate the packet group IDs to use for a given port/stream type/chain_id.
103 chain_id: identifies to which chain the pg_id is associated (0 to 255)
104 return: pg_id, lat_pg_id
106 We use a bit mask to set up the 3 fields:
107 0x007F: chain ID (8 bits for a max of 128 chains)
111 pg_id = port * TRex.PORT_PG_ID_MASK | chain_id
112 return pg_id, pg_id | TRex.LATENCY_PG_ID_MASK
114 def extract_stats(self, in_stats):
115 """Extract stats from dict returned by Trex API.
117 :param in_stats: dict as returned by TRex api
119 utils.nan_replace(in_stats)
120 # LOG.debug(in_stats)
123 # port_handles should have only 2 elements: [0, 1]
124 # so (1 - ph) will be the index for the far end port
125 for ph in self.port_handle:
127 far_end_stats = in_stats[1 - ph]
130 'total_pkts': cast_integer(stats['opackets']),
131 'total_pkt_bytes': cast_integer(stats['obytes']),
132 'pkt_rate': cast_integer(stats['tx_pps']),
133 'pkt_bit_rate': cast_integer(stats['tx_bps'])
136 'total_pkts': cast_integer(stats['ipackets']),
137 'total_pkt_bytes': cast_integer(stats['ibytes']),
138 'pkt_rate': cast_integer(stats['rx_pps']),
139 'pkt_bit_rate': cast_integer(stats['rx_bps']),
140 # how many pkts were dropped in RX direction
141 # need to take the tx counter on the far end port
142 'dropped_pkts': cast_integer(
143 far_end_stats['opackets'] - stats['ipackets'])
146 self.__combine_latencies(in_stats, result[ph]['rx'], ph)
148 total_tx_pkts = result[0]['tx']['total_pkts'] + result[1]['tx']['total_pkts']
149 result["total_tx_rate"] = cast_integer(total_tx_pkts / self.config.duration_sec)
150 result["flow_stats"] = in_stats["flow_stats"]
151 result["latency"] = in_stats["latency"]
154 def get_stream_stats(self, trex_stats, if_stats, latencies, chain_idx):
155 """Extract the aggregated stats for a given chain.
157 trex_stats: stats as returned by get_stats()
158 if_stats: a list of 2 interface stats to update (port 0 and 1)
159 latencies: a list of 2 Latency instances to update for this chain (port 0 and 1)
160 latencies[p] is the latency for packets sent on port p
161 if there are no latency streams, the Latency instances are not modified
162 chain_idx: chain index of the interface stats
164 The packet counts include normal and latency streams.
166 Trex returns flows stats as follows:
168 'flow_stats': {0: {'rx_bps': {0: 0, 1: 0, 'total': 0},
169 'rx_bps_l1': {0: 0.0, 1: 0.0, 'total': 0.0},
170 'rx_bytes': {0: nan, 1: nan, 'total': nan},
171 'rx_pkts': {0: 0, 1: 15001, 'total': 15001},
172 'rx_pps': {0: 0, 1: 0, 'total': 0},
173 'tx_bps': {0: 0, 1: 0, 'total': 0},
174 'tx_bps_l1': {0: 0.0, 1: 0.0, 'total': 0.0},
175 'tx_bytes': {0: 1020068, 1: 0, 'total': 1020068},
176 'tx_pkts': {0: 15001, 1: 0, 'total': 15001},
177 'tx_pps': {0: 0, 1: 0, 'total': 0}},
178 1: {'rx_bps': {0: 0, 1: 0, 'total': 0},
179 'rx_bps_l1': {0: 0.0, 1: 0.0, 'total': 0.0},
180 'rx_bytes': {0: nan, 1: nan, 'total': nan},
181 'rx_pkts': {0: 0, 1: 15001, 'total': 15001},
182 'rx_pps': {0: 0, 1: 0, 'total': 0},
183 'tx_bps': {0: 0, 1: 0, 'total': 0},
184 'tx_bps_l1': {0: 0.0, 1: 0.0, 'total': 0.0},
185 'tx_bytes': {0: 1020068, 1: 0, 'total': 1020068},
186 'tx_pkts': {0: 15001, 1: 0, 'total': 15001},
187 'tx_pps': {0: 0, 1: 0, 'total': 0}},
188 128: {'rx_bps': {0: 0, 1: 0, 'total': 0},
189 'rx_bps_l1': {0: 0.0, 1: 0.0, 'total': 0.0},
190 'rx_bytes': {0: nan, 1: nan, 'total': nan},
191 'rx_pkts': {0: 15001, 1: 0, 'total': 15001},
192 'rx_pps': {0: 0, 1: 0, 'total': 0},
193 'tx_bps': {0: 0, 1: 0, 'total': 0},
194 'tx_bps_l1': {0: 0.0, 1: 0.0, 'total': 0.0},
195 'tx_bytes': {0: 0, 1: 1020068, 'total': 1020068},
196 'tx_pkts': {0: 0, 1: 15001, 'total': 15001},
197 'tx_pps': {0: 0, 1: 0, 'total': 0}},etc...
199 the pg_id (0, 1, 128,...) is the key of the dict and is obtained using the
201 packet counters for a given stream sent on port p are reported as:
202 - tx_pkts[p] on port p
203 - rx_pkts[1-p] on the far end port
205 This is a tricky/critical counter transposition operation because
206 the results are grouped by port (not by stream):
207 tx_pkts_port(p=0) comes from pg_id(port=0, chain_idx)['tx_pkts'][0]
208 rx_pkts_port(p=0) comes from pg_id(port=1, chain_idx)['rx_pkts'][0]
209 tx_pkts_port(p=1) comes from pg_id(port=1, chain_idx)['tx_pkts'][1]
210 rx_pkts_port(p=1) comes from pg_id(port=0, chain_idx)['rx_pkts'][1]
212 or using a more generic formula:
213 tx_pkts_port(p) comes from pg_id(port=p, chain_idx)['tx_pkts'][p]
214 rx_pkts_port(p) comes from pg_id(port=1-p, chain_idx)['rx_pkts'][p]
216 the second formula is equivalent to
217 rx_pkts_port(1-p) comes from pg_id(port=p, chain_idx)['rx_pkts'][1-p]
219 If there are latency streams, those same counters need to be added in the same way
221 def get_latency(lval):
223 return int(round(lval))
229 for port in range(2):
230 pg_id, lat_pg_id = self.get_pg_id(port, chain_idx)
231 for pid in [pg_id, lat_pg_id]:
233 pg_stats = trex_stats['flow_stats'][pid]
234 if_stats[port].tx += pg_stats['tx_pkts'][port]
235 if_stats[1 - port].rx += pg_stats['rx_pkts'][1 - port]
239 lat = trex_stats['latency'][lat_pg_id]['latency']
240 # dropped_pkts += lat['err_cntrs']['dropped']
241 latencies[port].max_usec = get_latency(lat['total_max'])
242 if math.isnan(lat['total_min']):
243 latencies[port].min_usec = 0
244 latencies[port].avg_usec = 0
246 latencies[port].min_usec = get_latency(lat['total_min'])
247 latencies[port].avg_usec = get_latency(lat['average'])
251 def __combine_latencies(self, in_stats, results, port_handle):
252 """Traverse TRex result dictionary and combines chosen latency stats."""
255 total_min = float("inf")
256 for chain_id in range(self.chain_count):
258 _, lat_pg_id = self.get_pg_id(port_handle, chain_id)
259 lat = in_stats['latency'][lat_pg_id]['latency']
260 # dropped_pkts += lat['err_cntrs']['dropped']
261 total_max = max(lat['total_max'], total_max)
262 total_min = min(lat['total_min'], total_min)
263 average += lat['average']
266 if total_min == float("inf"):
268 results['min_delay_usec'] = total_min
269 results['max_delay_usec'] = total_max
270 results['avg_delay_usec'] = int(average / self.chain_count)
272 def _bind_vxlan(self):
273 bind_layers(UDP, VXLAN, dport=4789)
274 bind_layers(VXLAN, Ether)
276 def _create_pkt(self, stream_cfg, l2frame_size):
277 """Create a packet of given size.
279 l2frame_size: size of the L2 frame in bytes (including the 32-bit FCS)
281 # Trex will add the FCS field, so we need to remove 4 bytes from the l2 frame size
282 frame_size = int(l2frame_size) - 4
284 if stream_cfg['vxlan'] is True:
287 pkt_base = Ether(src=stream_cfg['vtep_src_mac'], dst=stream_cfg['vtep_dst_mac'])
288 if stream_cfg['vtep_vlan'] is not None:
289 pkt_base /= Dot1Q(vlan=stream_cfg['vtep_vlan'])
290 pkt_base /= IP(src=stream_cfg['vtep_src_ip'], dst=stream_cfg['vtep_dst_ip'])
291 pkt_base /= UDP(sport=random.randint(1337, 32767), dport=4789)
292 pkt_base /= VXLAN(vni=stream_cfg['net_vni'])
293 pkt_base /= Ether(src=stream_cfg['mac_src'], dst=stream_cfg['mac_dst'])
296 pkt_base = Ether(src=stream_cfg['mac_src'], dst=stream_cfg['mac_dst'])
298 if stream_cfg['vlan_tag'] is not None:
299 pkt_base /= Dot1Q(vlan=stream_cfg['vlan_tag'])
302 if stream_cfg['udp_src_port']:
303 udp_args['sport'] = int(stream_cfg['udp_src_port'])
304 if stream_cfg['udp_dst_port']:
305 udp_args['dport'] = int(stream_cfg['udp_dst_port'])
306 pkt_base /= IP() / UDP(**udp_args)
308 if stream_cfg['ip_addrs_step'] == 'random':
309 src_fv = STLVmFlowVarRepeatableRandom(
311 min_value=stream_cfg['ip_src_addr'],
312 max_value=stream_cfg['ip_src_addr_max'],
314 seed=random.randint(0, 32767),
315 limit=stream_cfg['ip_src_count'])
316 dst_fv = STLVmFlowVarRepeatableRandom(
318 min_value=stream_cfg['ip_dst_addr'],
319 max_value=stream_cfg['ip_dst_addr_max'],
321 seed=random.randint(0, 32767),
322 limit=stream_cfg['ip_dst_count'])
324 src_fv = STLVmFlowVar(
326 min_value=stream_cfg['ip_src_addr'],
327 max_value=stream_cfg['ip_src_addr'],
330 step=stream_cfg['ip_addrs_step'])
331 dst_fv = STLVmFlowVar(
333 min_value=stream_cfg['ip_dst_addr'],
334 max_value=stream_cfg['ip_dst_addr_max'],
337 step=stream_cfg['ip_addrs_step'])
341 STLVmWrFlowVar(fv_name="ip_src", pkt_offset="IP:{}.src".format(encap_level)),
343 STLVmWrFlowVar(fv_name="ip_dst", pkt_offset="IP:{}.dst".format(encap_level)),
344 STLVmFixChecksumHw(l3_offset="IP:{}".format(encap_level),
345 l4_offset="UDP:{}".format(encap_level),
346 l4_type=CTRexVmInsFixHwCs.L4_TYPE_UDP)
348 pad = max(0, frame_size - len(pkt_base)) * 'x'
350 return STLPktBuilder(pkt=pkt_base / pad, vm=STLScVmRaw(vm_param))
352 def generate_streams(self, port, chain_id, stream_cfg, l2frame, latency=True):
353 """Create a list of streams corresponding to a given chain and stream config.
355 port: port where the streams originate (0 or 1)
356 chain_id: the chain to which the streams are associated to
357 stream_cfg: stream configuration
358 l2frame: L2 frame size (including 4-byte FCS) or 'IMIX'
359 latency: if True also create a latency stream
362 pg_id, lat_pg_id = self.get_pg_id(port, chain_id)
363 if l2frame == 'IMIX':
364 for ratio, l2_frame_size in zip(IMIX_RATIOS, IMIX_L2_SIZES):
365 pkt = self._create_pkt(stream_cfg, l2_frame_size)
366 streams.append(STLStream(packet=pkt,
367 flow_stats=STLFlowStats(pg_id=pg_id),
368 mode=STLTXCont(pps=ratio)))
371 # for IMIX, the latency packets have the average IMIX packet size
372 pkt = self._create_pkt(stream_cfg, IMIX_AVG_L2_FRAME_SIZE)
375 l2frame_size = int(l2frame)
376 pkt = self._create_pkt(stream_cfg, l2frame_size)
377 streams.append(STLStream(packet=pkt,
378 flow_stats=STLFlowStats(pg_id=pg_id),
380 # for the latency stream, the minimum payload is 16 bytes even in case of vlan tagging
381 # without vlan, the min l2 frame size is 64
383 # This only applies to the latency stream
384 if latency and stream_cfg['vlan_tag'] and l2frame_size < 68:
385 pkt = self._create_pkt(stream_cfg, 68)
388 streams.append(STLStream(packet=pkt,
389 flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id),
390 mode=STLTXCont(pps=self.LATENCY_PPS)))
394 def __connect(self, client):
397 def __connect_after_start(self):
398 # after start, Trex may take a bit of time to initialize
399 # so we need to retry a few times
400 for it in xrange(self.config.generic_retry_count):
403 self.client.connect()
405 except Exception as ex:
406 if it == (self.config.generic_retry_count - 1):
408 LOG.info("Retrying connection to TRex (%s)...", ex.message)
411 """Connect to the TRex server."""
412 server_ip = self.generator_config.ip
413 LOG.info("Connecting to TRex (%s)...", server_ip)
415 # Connect to TRex server
416 self.client = STLClient(server=server_ip, sync_port=self.generator_config.zmq_rpc_port,
417 async_port=self.generator_config.zmq_pub_port)
419 self.__connect(self.client)
420 except (TimeoutError, STLError) as e:
421 if server_ip == '127.0.0.1':
423 self.__start_server()
424 self.__connect_after_start()
425 except (TimeoutError, STLError) as e:
426 LOG.error('Cannot connect to TRex')
427 LOG.error(traceback.format_exc())
428 logpath = '/tmp/trex.log'
429 if os.path.isfile(logpath):
430 # Wait for TRex to finish writing error message
432 for _ in xrange(self.config.generic_retry_count):
433 size = os.path.getsize(logpath)
434 if size == last_size:
435 # probably not writing anymore
439 with open(logpath, 'r') as f:
443 raise TrafficGeneratorException(message)
445 raise TrafficGeneratorException(e.message)
447 ports = list(self.generator_config.ports)
448 self.port_handle = ports
450 self.client.reset(ports)
451 # Read HW information from each port
452 # this returns an array of dict (1 per port)
454 Example of output for Intel XL710
455 [{'arp': '-', 'src_ipv4': '-', u'supp_speeds': [40000], u'is_link_supported': True,
456 'grat_arp': 'off', 'speed': 40, u'index': 0, 'link_change_supported': 'yes',
457 u'rx': {u'counters': 127, u'caps': [u'flow_stats', u'latency']},
458 u'is_virtual': 'no', 'prom': 'off', 'src_mac': u'3c:fd:fe:a8:24:48', 'status': 'IDLE',
459 u'description': u'Ethernet Controller XL710 for 40GbE QSFP+',
460 'dest': u'fa:16:3e:3c:63:04', u'is_fc_supported': False, 'vlan': '-',
461 u'driver': u'net_i40e', 'led_change_supported': 'yes', 'rx_filter_mode': 'hardware match',
462 'fc': 'none', 'link': 'UP', u'hw_mac': u'3c:fd:fe:a8:24:48', u'pci_addr': u'0000:5e:00.0',
463 'mult': 'off', 'fc_supported': 'no', u'is_led_supported': True, 'rx_queue': 'off',
464 'layer_mode': 'Ethernet', u'numa': 0}, ...]
466 self.port_info = self.client.get_port_info(ports)
467 LOG.info('Connected to TRex')
468 for id, port in enumerate(self.port_info):
469 LOG.info(' Port %d: %s speed=%dGbps mac=%s pci=%s driver=%s',
470 id, port['description'], port['speed'], port['src_mac'],
471 port['pci_addr'], port['driver'])
472 # Make sure the 2 ports have the same speed
473 if self.port_info[0]['speed'] != self.port_info[1]['speed']:
474 raise TrafficGeneratorException('Traffic generator ports speed mismatch: %d/%d Gbps' %
475 (self.port_info[0]['speed'],
476 self.port_info[1]['speed']))
478 def __start_server(self):
479 server = TRexTrafficServer()
480 server.run_server(self.generator_config)
482 def resolve_arp(self):
483 """Resolve all configured remote IP addresses.
485 return: None if ARP failed to resolve for all IP addresses
486 else a dict of list of dest macs indexed by port#
487 the dest macs in the list are indexed by the chain id
489 self.client.set_service_mode(ports=self.port_handle)
490 LOG.info('Polling ARP until successful...')
492 for port, device in zip(self.port_handle, self.generator_config.devices):
493 # there should be 1 stream config per chain
494 stream_configs = device.get_stream_configs()
495 chain_count = len(stream_configs)
496 ctx = self.client.create_service_ctx(port=port)
497 # all dest macs on this port indexed by chain ID
498 dst_macs = [None] * chain_count
500 # the index in the list is the chain id
501 if self.config.vxlan:
504 src_ip=device.vtep_src_ip,
505 dst_ip=device.vtep_dst_ip,
506 vlan=device.vtep_vlan)
507 for cfg in stream_configs
512 src_ip=cfg['ip_src_tg_gw'],
513 dst_ip=cfg['mac_discovery_gw'],
514 # will be None if no vlan tagging
515 vlan=cfg['vlan_tag'])
516 for cfg in stream_configs
519 for attempt in range(self.config.generic_retry_count):
523 LOG.error(traceback.format_exc())
527 for chain_id, mac in enumerate(dst_macs):
529 arp_record = arps[chain_id].get_record()
530 if arp_record.dst_mac:
531 dst_macs[chain_id] = arp_record.dst_mac
533 LOG.info(' ARP: port=%d chain=%d src IP=%s dst IP=%s -> MAC=%s',
536 arp_record.dst_ip, arp_record.dst_mac)
538 unresolved.append(arp_record.dst_ip)
539 if dst_macs_count == chain_count:
540 arp_dest_macs[port] = dst_macs
541 LOG.info('ARP resolved successfully for port %s', port)
545 LOG.info('Retrying ARP for: %s (retry %d/%d)',
546 unresolved, retry, self.config.generic_retry_count)
547 if retry < self.config.generic_retry_count:
548 time.sleep(self.config.generic_poll_sec)
550 LOG.error('ARP timed out for port %s (resolved %d out of %d)',
556 self.client.set_service_mode(ports=self.port_handle, enabled=False)
557 if len(arp_dest_macs) == len(self.port_handle):
561 def __is_rate_enough(self, l2frame_size, rates, bidirectional, latency):
562 """Check if rate provided by user is above requirements. Applies only if latency is True."""
563 intf_speed = self.generator_config.intf_speed
569 r = utils.convert_rates(l2frame_size, rate, intf_speed)
570 total_rate += int(r['rate_pps'])
573 total_rate = utils.convert_rates(l2frame_size, rates[0], intf_speed)
574 # rate must be enough for latency stream and at least 1 pps for base stream per chain
575 required_rate = (self.LATENCY_PPS + 1) * self.config.service_chain_count * mult
576 result = utils.convert_rates(l2frame_size,
577 {'rate_pps': required_rate},
579 result['result'] = total_rate >= required_rate
582 return {'result': True}
584 def create_traffic(self, l2frame_size, rates, bidirectional, latency=True):
585 """Program all the streams in Trex server.
587 l2frame_size: L2 frame size or IMIX
588 rates: a list of 2 rates to run each direction
589 each rate is a dict like {'rate_pps': '10kpps'}
590 bidirectional: True if bidirectional
591 latency: True if latency measurement is needed
593 r = self.__is_rate_enough(l2frame_size, rates, bidirectional, latency)
595 raise TrafficGeneratorException(
596 'Required rate in total is at least one of: \n{pps}pps \n{bps}bps \n{load}%.'
597 .format(pps=r['rate_pps'],
599 load=r['rate_percent']))
600 # a dict of list of streams indexed by port#
601 # in case of fixed size, has self.chain_count * 2 * 2 streams
602 # (1 normal + 1 latency stream per direction per chain)
603 # for IMIX, has self.chain_count * 2 * 4 streams
604 # (3 normal + 1 latency stream per direction per chain)
606 for port in self.port_handle:
607 streamblock[port] = []
608 stream_cfgs = [d.get_stream_configs() for d in self.generator_config.devices]
609 self.rates = [utils.to_rate_str(rate) for rate in rates]
610 for chain_id, (fwd_stream_cfg, rev_stream_cfg) in enumerate(zip(*stream_cfgs)):
611 streamblock[0].extend(self.generate_streams(self.port_handle[0],
616 if len(self.rates) > 1:
617 streamblock[1].extend(self.generate_streams(self.port_handle[1],
621 latency=bidirectional and latency))
623 for port in self.port_handle:
624 self.client.add_streams(streamblock[port], ports=port)
625 LOG.info('Created %d traffic streams for port %s.', len(streamblock[port]), port)
627 def clear_streamblock(self):
628 """Clear all streams from TRex."""
630 self.client.reset(self.port_handle)
631 LOG.info('Cleared all existing streams')
634 """Get stats from Trex."""
635 stats = self.client.get_stats()
636 return self.extract_stats(stats)
639 """Return the Trex local port MAC addresses.
641 return: a list of MAC addresses indexed by the port#
643 return [port['src_mac'] for port in self.port_info]
645 def get_port_speed_gbps(self):
646 """Return the Trex local port MAC addresses.
648 return: a list of speed in Gbps indexed by the port#
650 return [port['speed'] for port in self.port_info]
652 def clear_stats(self):
653 """Clear all stats in the traffic gneerator."""
655 self.client.clear_stats()
657 def start_traffic(self):
658 """Start generating traffic in all ports."""
659 for port, rate in zip(self.port_handle, self.rates):
660 self.client.start(ports=port, mult=rate, duration=self.config.duration_sec, force=True)
662 def stop_traffic(self):
663 """Stop generating traffic."""
664 self.client.stop(ports=self.port_handle)
666 def start_capture(self):
667 """Capture all packets on both ports that are unicast to us."""
670 # Need to filter out unwanted packets so we do not end up counting
671 # src MACs of frames that are not unicast to us
672 src_mac_list = self.get_macs()
673 bpf_filter = "ether dst %s or ether dst %s" % (src_mac_list[0], src_mac_list[1])
674 # ports must be set in service in order to enable capture
675 self.client.set_service_mode(ports=self.port_handle)
676 self.capture_id = self.client.start_capture(rx_ports=self.port_handle,
677 bpf_filter=bpf_filter)
679 def fetch_capture_packets(self):
680 """Fetch capture packets in capture mode."""
682 self.packet_list = []
683 self.client.fetch_capture_packets(capture_id=self.capture_id['id'],
684 output=self.packet_list)
686 def stop_capture(self):
687 """Stop capturing packets."""
689 self.client.stop_capture(capture_id=self.capture_id['id'])
690 self.capture_id = None
691 self.client.set_service_mode(ports=self.port_handle, enabled=False)
694 """Cleanup Trex driver."""
697 self.client.reset(self.port_handle)
698 self.client.disconnect()
700 # TRex does not like a reset while in disconnected state