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'])
248 # pick up the HDR histogram if present (otherwise will raise KeyError)
249 latencies[port].hdrh = lat['hdrh']
253 def __combine_latencies(self, in_stats, results, port_handle):
254 """Traverse TRex result dictionary and combines chosen latency stats.
256 example of latency dict returned by trex (2 chains):
257 'latency': {256: {'err_cntrs': {'dropped': 0,
262 'latency': {'average': 26.5,
263 'hdrh': u'HISTFAAAAEx4nJNpmSgz...bFRgxi',
264 'histogram': {20: 303,
274 257: {'err_cntrs': {'dropped': 0,
279 'latency': {'average': 29.75,
280 'hdrh': u'HISTFAAAAEV4nJN...CALilDG0=',
281 'histogram': {20: 261,
290 384: {'err_cntrs': {'dropped': 0,
295 'latency': {'average': 18.0,
296 'hdrh': u'HISTFAAAADR4nJNpm...MjCwDDxAZG',
297 'histogram': {20: 987, 30: 14},
302 385: {'err_cntrs': {'dropped': 0,
307 'latency': {'average': 19.0,
308 'hdrh': u'HISTFAAAADR4nJNpm...NkYmJgDdagfK',
309 'histogram': {20: 989, 30: 11},
314 'global': {'bad_hdr': 0, 'old_flow': 0}},
318 total_min = float("inf")
319 for chain_id in range(self.chain_count):
321 _, lat_pg_id = self.get_pg_id(port_handle, chain_id)
322 lat = in_stats['latency'][lat_pg_id]['latency']
323 # dropped_pkts += lat['err_cntrs']['dropped']
324 total_max = max(lat['total_max'], total_max)
325 total_min = min(lat['total_min'], total_min)
326 average += lat['average']
329 if total_min == float("inf"):
331 results['min_delay_usec'] = total_min
332 results['max_delay_usec'] = total_max
333 results['avg_delay_usec'] = int(average / self.chain_count)
335 def _bind_vxlan(self):
336 bind_layers(UDP, VXLAN, dport=4789)
337 bind_layers(VXLAN, Ether)
339 def _create_pkt(self, stream_cfg, l2frame_size):
340 """Create a packet of given size.
342 l2frame_size: size of the L2 frame in bytes (including the 32-bit FCS)
344 # Trex will add the FCS field, so we need to remove 4 bytes from the l2 frame size
345 frame_size = int(l2frame_size) - 4
347 if stream_cfg['vxlan'] is True:
350 pkt_base = Ether(src=stream_cfg['vtep_src_mac'], dst=stream_cfg['vtep_dst_mac'])
351 if stream_cfg['vtep_vlan'] is not None:
352 pkt_base /= Dot1Q(vlan=stream_cfg['vtep_vlan'])
353 pkt_base /= IP(src=stream_cfg['vtep_src_ip'], dst=stream_cfg['vtep_dst_ip'])
354 pkt_base /= UDP(sport=random.randint(1337, 32767), dport=4789)
355 pkt_base /= VXLAN(vni=stream_cfg['net_vni'])
356 pkt_base /= Ether(src=stream_cfg['mac_src'], dst=stream_cfg['mac_dst'])
357 # need to randomize the outer header UDP src port based on flow
358 vxlan_udp_src_fv = STLVmFlowVar(
359 name="vxlan_udp_src",
364 vm_param = [vxlan_udp_src_fv,
365 STLVmWrFlowVar(fv_name="vxlan_udp_src", pkt_offset="UDP.sport")]
368 pkt_base = Ether(src=stream_cfg['mac_src'], dst=stream_cfg['mac_dst'])
370 if stream_cfg['vlan_tag'] is not None:
371 pkt_base /= Dot1Q(vlan=stream_cfg['vlan_tag'])
374 if stream_cfg['udp_src_port']:
375 udp_args['sport'] = int(stream_cfg['udp_src_port'])
376 if stream_cfg['udp_dst_port']:
377 udp_args['dport'] = int(stream_cfg['udp_dst_port'])
378 pkt_base /= IP() / UDP(**udp_args)
380 if stream_cfg['ip_addrs_step'] == 'random':
381 src_fv = STLVmFlowVarRepeatableRandom(
383 min_value=stream_cfg['ip_src_addr'],
384 max_value=stream_cfg['ip_src_addr_max'],
386 seed=random.randint(0, 32767),
387 limit=stream_cfg['ip_src_count'])
388 dst_fv = STLVmFlowVarRepeatableRandom(
390 min_value=stream_cfg['ip_dst_addr'],
391 max_value=stream_cfg['ip_dst_addr_max'],
393 seed=random.randint(0, 32767),
394 limit=stream_cfg['ip_dst_count'])
396 src_fv = STLVmFlowVar(
398 min_value=stream_cfg['ip_src_addr'],
399 max_value=stream_cfg['ip_src_addr'],
402 step=stream_cfg['ip_addrs_step'])
403 dst_fv = STLVmFlowVar(
405 min_value=stream_cfg['ip_dst_addr'],
406 max_value=stream_cfg['ip_dst_addr_max'],
409 step=stream_cfg['ip_addrs_step'])
413 STLVmWrFlowVar(fv_name="ip_src", pkt_offset="IP:{}.src".format(encap_level)),
415 STLVmWrFlowVar(fv_name="ip_dst", pkt_offset="IP:{}.dst".format(encap_level))
418 for encap in range(int(encap_level), -1, -1):
419 # Fixing the checksums for all encap levels
420 vm_param.append(STLVmFixChecksumHw(l3_offset="IP:{}".format(encap),
421 l4_offset="UDP:{}".format(encap),
422 l4_type=CTRexVmInsFixHwCs.L4_TYPE_UDP))
423 pad = max(0, frame_size - len(pkt_base)) * 'x'
425 return STLPktBuilder(pkt=pkt_base / pad,
426 vm=STLScVmRaw(vm_param, cache_size=int(self.config.cache_size)))
428 def generate_streams(self, port, chain_id, stream_cfg, l2frame, latency=True,
430 """Create a list of streams corresponding to a given chain and stream config.
432 port: port where the streams originate (0 or 1)
433 chain_id: the chain to which the streams are associated to
434 stream_cfg: stream configuration
435 l2frame: L2 frame size (including 4-byte FCS) or 'IMIX'
436 latency: if True also create a latency stream
437 e2e: True if performing "end to end" connectivity check
440 pg_id, lat_pg_id = self.get_pg_id(port, chain_id)
441 if l2frame == 'IMIX':
442 for ratio, l2_frame_size in zip(IMIX_RATIOS, IMIX_L2_SIZES):
443 pkt = self._create_pkt(stream_cfg, l2_frame_size)
445 streams.append(STLStream(packet=pkt,
446 mode=STLTXCont(pps=ratio)))
448 if stream_cfg['vxlan'] is True:
449 streams.append(STLStream(packet=pkt,
450 flow_stats=STLFlowStats(pg_id=pg_id,
452 mode=STLTXCont(pps=ratio)))
454 streams.append(STLStream(packet=pkt,
455 flow_stats=STLFlowStats(pg_id=pg_id),
456 mode=STLTXCont(pps=ratio)))
459 # for IMIX, the latency packets have the average IMIX packet size
460 pkt = self._create_pkt(stream_cfg, IMIX_AVG_L2_FRAME_SIZE)
463 l2frame_size = int(l2frame)
464 pkt = self._create_pkt(stream_cfg, l2frame_size)
466 streams.append(STLStream(packet=pkt,
469 if stream_cfg['vxlan'] is True:
470 streams.append(STLStream(packet=pkt,
471 flow_stats=STLFlowStats(pg_id=pg_id,
475 streams.append(STLStream(packet=pkt,
476 flow_stats=STLFlowStats(pg_id=pg_id),
478 # for the latency stream, the minimum payload is 16 bytes even in case of vlan tagging
479 # without vlan, the min l2 frame size is 64
481 # This only applies to the latency stream
482 if latency and stream_cfg['vlan_tag'] and l2frame_size < 68:
483 pkt = self._create_pkt(stream_cfg, 68)
486 if stream_cfg['vxlan'] is True:
487 streams.append(STLStream(packet=pkt,
488 flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id,
490 mode=STLTXCont(pps=self.LATENCY_PPS)))
492 streams.append(STLStream(packet=pkt,
493 flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id),
494 mode=STLTXCont(pps=self.LATENCY_PPS)))
498 def __connect(self, client):
501 def __connect_after_start(self):
502 # after start, Trex may take a bit of time to initialize
503 # so we need to retry a few times
504 for it in xrange(self.config.generic_retry_count):
507 self.client.connect()
509 except Exception as ex:
510 if it == (self.config.generic_retry_count - 1):
512 LOG.info("Retrying connection to TRex (%s)...", ex.message)
515 """Connect to the TRex server."""
516 server_ip = self.generator_config.ip
517 LOG.info("Connecting to TRex (%s)...", server_ip)
519 # Connect to TRex server
520 self.client = STLClient(server=server_ip, sync_port=self.generator_config.zmq_rpc_port,
521 async_port=self.generator_config.zmq_pub_port)
523 self.__connect(self.client)
524 if server_ip == '127.0.0.1':
525 config_updated = self.__check_config()
526 if config_updated or self.config.restart:
528 except (TimeoutError, STLError) as e:
529 if server_ip == '127.0.0.1':
530 self.__start_local_server()
532 raise TrafficGeneratorException(e.message)
534 ports = list(self.generator_config.ports)
535 self.port_handle = ports
537 self.client.reset(ports)
538 # Read HW information from each port
539 # this returns an array of dict (1 per port)
541 Example of output for Intel XL710
542 [{'arp': '-', 'src_ipv4': '-', u'supp_speeds': [40000], u'is_link_supported': True,
543 'grat_arp': 'off', 'speed': 40, u'index': 0, 'link_change_supported': 'yes',
544 u'rx': {u'counters': 127, u'caps': [u'flow_stats', u'latency']},
545 u'is_virtual': 'no', 'prom': 'off', 'src_mac': u'3c:fd:fe:a8:24:48', 'status': 'IDLE',
546 u'description': u'Ethernet Controller XL710 for 40GbE QSFP+',
547 'dest': u'fa:16:3e:3c:63:04', u'is_fc_supported': False, 'vlan': '-',
548 u'driver': u'net_i40e', 'led_change_supported': 'yes', 'rx_filter_mode': 'hardware match',
549 'fc': 'none', 'link': 'UP', u'hw_mac': u'3c:fd:fe:a8:24:48', u'pci_addr': u'0000:5e:00.0',
550 'mult': 'off', 'fc_supported': 'no', u'is_led_supported': True, 'rx_queue': 'off',
551 'layer_mode': 'Ethernet', u'numa': 0}, ...]
553 self.port_info = self.client.get_port_info(ports)
554 LOG.info('Connected to TRex')
555 for id, port in enumerate(self.port_info):
556 LOG.info(' Port %d: %s speed=%dGbps mac=%s pci=%s driver=%s',
557 id, port['description'], port['speed'], port['src_mac'],
558 port['pci_addr'], port['driver'])
559 # Make sure the 2 ports have the same speed
560 if self.port_info[0]['speed'] != self.port_info[1]['speed']:
561 raise TrafficGeneratorException('Traffic generator ports speed mismatch: %d/%d Gbps' %
562 (self.port_info[0]['speed'],
563 self.port_info[1]['speed']))
565 def __start_local_server(self):
567 LOG.info("Starting TRex ...")
568 self.__start_server()
569 self.__connect_after_start()
570 except (TimeoutError, STLError) as e:
571 LOG.error('Cannot connect to TRex')
572 LOG.error(traceback.format_exc())
573 logpath = '/tmp/trex.log'
574 if os.path.isfile(logpath):
575 # Wait for TRex to finish writing error message
577 for _ in xrange(self.config.generic_retry_count):
578 size = os.path.getsize(logpath)
579 if size == last_size:
580 # probably not writing anymore
584 with open(logpath, 'r') as f:
588 raise TrafficGeneratorException(message)
590 def __start_server(self):
591 server = TRexTrafficServer()
592 server.run_server(self.generator_config)
594 def __check_config(self):
595 server = TRexTrafficServer()
596 return server.check_config_updated(self.generator_config)
599 LOG.info("Restarting TRex ...")
601 # Wait for server stopped
602 for _ in xrange(self.config.generic_retry_count):
604 if not self.client.is_connected():
605 LOG.info("TRex is stopped...")
607 self.__start_local_server()
609 def __stop_server(self):
610 if self.generator_config.ip == '127.0.0.1':
611 ports = self.client.get_acquired_ports()
612 LOG.info('Release ports %s and stopping TRex...', ports)
615 self.client.release(ports=ports)
616 self.client.server_shutdown()
617 except STLError as e:
618 LOG.warn('Unable to stop TRex. Error: %s', e)
620 LOG.info('Using remote TRex. Unable to stop TRex')
622 def resolve_arp(self):
623 """Resolve all configured remote IP addresses.
625 return: None if ARP failed to resolve for all IP addresses
626 else a dict of list of dest macs indexed by port#
627 the dest macs in the list are indexed by the chain id
629 self.client.set_service_mode(ports=self.port_handle)
630 LOG.info('Polling ARP until successful...')
632 for port, device in zip(self.port_handle, self.generator_config.devices):
633 # there should be 1 stream config per chain
634 stream_configs = device.get_stream_configs()
635 chain_count = len(stream_configs)
636 ctx = self.client.create_service_ctx(port=port)
637 # all dest macs on this port indexed by chain ID
638 dst_macs = [None] * chain_count
640 # the index in the list is the chain id
641 if self.config.vxlan:
644 src_ip=device.vtep_src_ip,
645 dst_ip=device.vtep_dst_ip,
646 vlan=device.vtep_vlan)
647 for cfg in stream_configs
652 src_ip=cfg['ip_src_tg_gw'],
653 dst_ip=cfg['mac_discovery_gw'],
654 # will be None if no vlan tagging
655 vlan=cfg['vlan_tag'])
656 for cfg in stream_configs
659 for attempt in range(self.config.generic_retry_count):
663 LOG.error(traceback.format_exc())
667 for chain_id, mac in enumerate(dst_macs):
669 arp_record = arps[chain_id].get_record()
670 if arp_record.dst_mac:
671 dst_macs[chain_id] = arp_record.dst_mac
673 LOG.info(' ARP: port=%d chain=%d src IP=%s dst IP=%s -> MAC=%s',
676 arp_record.dst_ip, arp_record.dst_mac)
678 unresolved.append(arp_record.dst_ip)
679 if dst_macs_count == chain_count:
680 arp_dest_macs[port] = dst_macs
681 LOG.info('ARP resolved successfully for port %s', port)
685 LOG.info('Retrying ARP for: %s (retry %d/%d)',
686 unresolved, retry, self.config.generic_retry_count)
687 if retry < self.config.generic_retry_count:
688 time.sleep(self.config.generic_poll_sec)
690 LOG.error('ARP timed out for port %s (resolved %d out of %d)',
696 # if the capture from the TRex console was started before the arp request step,
697 # it keeps 'service_mode' enabled, otherwise, it disables the 'service_mode'
698 if not self.config.service_mode:
699 self.client.set_service_mode(ports=self.port_handle, enabled=False)
700 if len(arp_dest_macs) == len(self.port_handle):
704 def __is_rate_enough(self, l2frame_size, rates, bidirectional, latency):
705 """Check if rate provided by user is above requirements. Applies only if latency is True."""
706 intf_speed = self.generator_config.intf_speed
712 r = utils.convert_rates(l2frame_size, rate, intf_speed)
713 total_rate += int(r['rate_pps'])
716 total_rate = utils.convert_rates(l2frame_size, rates[0], intf_speed)
717 # rate must be enough for latency stream and at least 1 pps for base stream per chain
718 required_rate = (self.LATENCY_PPS + 1) * self.config.service_chain_count * mult
719 result = utils.convert_rates(l2frame_size,
720 {'rate_pps': required_rate},
722 result['result'] = total_rate >= required_rate
725 return {'result': True}
727 def create_traffic(self, l2frame_size, rates, bidirectional, latency=True, e2e=False):
728 """Program all the streams in Trex server.
730 l2frame_size: L2 frame size or IMIX
731 rates: a list of 2 rates to run each direction
732 each rate is a dict like {'rate_pps': '10kpps'}
733 bidirectional: True if bidirectional
734 latency: True if latency measurement is needed
735 e2e: True if performing "end to end" connectivity check
737 r = self.__is_rate_enough(l2frame_size, rates, bidirectional, latency)
739 raise TrafficGeneratorException(
740 'Required rate in total is at least one of: \n{pps}pps \n{bps}bps \n{load}%.'
741 .format(pps=r['rate_pps'],
743 load=r['rate_percent']))
744 # a dict of list of streams indexed by port#
745 # in case of fixed size, has self.chain_count * 2 * 2 streams
746 # (1 normal + 1 latency stream per direction per chain)
747 # for IMIX, has self.chain_count * 2 * 4 streams
748 # (3 normal + 1 latency stream per direction per chain)
750 for port in self.port_handle:
751 streamblock[port] = []
752 stream_cfgs = [d.get_stream_configs() for d in self.generator_config.devices]
753 self.rates = [utils.to_rate_str(rate) for rate in rates]
754 for chain_id, (fwd_stream_cfg, rev_stream_cfg) in enumerate(zip(*stream_cfgs)):
755 streamblock[0].extend(self.generate_streams(self.port_handle[0],
761 if len(self.rates) > 1:
762 streamblock[1].extend(self.generate_streams(self.port_handle[1],
766 latency=bidirectional and latency,
769 for port in self.port_handle:
770 if self.config.vxlan:
771 self.client.set_port_attr(ports=port, vxlan_fs=[4789])
773 self.client.set_port_attr(ports=port, vxlan_fs=None)
774 self.client.add_streams(streamblock[port], ports=port)
775 LOG.info('Created %d traffic streams for port %s.', len(streamblock[port]), port)
777 def clear_streamblock(self):
778 """Clear all streams from TRex."""
780 self.client.reset(self.port_handle)
781 LOG.info('Cleared all existing streams')
784 """Get stats from Trex."""
785 stats = self.client.get_stats()
786 return self.extract_stats(stats)
789 """Return the Trex local port MAC addresses.
791 return: a list of MAC addresses indexed by the port#
793 return [port['src_mac'] for port in self.port_info]
795 def get_port_speed_gbps(self):
796 """Return the Trex local port MAC addresses.
798 return: a list of speed in Gbps indexed by the port#
800 return [port['speed'] for port in self.port_info]
802 def clear_stats(self):
803 """Clear all stats in the traffic gneerator."""
805 self.client.clear_stats()
807 def start_traffic(self):
808 """Start generating traffic in all ports."""
809 for port, rate in zip(self.port_handle, self.rates):
810 self.client.start(ports=port, mult=rate, duration=self.config.duration_sec, force=True)
812 def stop_traffic(self):
813 """Stop generating traffic."""
814 self.client.stop(ports=self.port_handle)
816 def start_capture(self):
817 """Capture all packets on both ports that are unicast to us."""
820 # Need to filter out unwanted packets so we do not end up counting
821 # src MACs of frames that are not unicast to us
822 src_mac_list = self.get_macs()
823 bpf_filter = "ether dst %s or ether dst %s" % (src_mac_list[0], src_mac_list[1])
824 # ports must be set in service in order to enable capture
825 self.client.set_service_mode(ports=self.port_handle)
826 self.capture_id = self.client.start_capture(rx_ports=self.port_handle,
827 bpf_filter=bpf_filter)
829 def fetch_capture_packets(self):
830 """Fetch capture packets in capture mode."""
832 self.packet_list = []
833 self.client.fetch_capture_packets(capture_id=self.capture_id['id'],
834 output=self.packet_list)
836 def stop_capture(self):
837 """Stop capturing packets."""
839 self.client.stop_capture(capture_id=self.capture_id['id'])
840 self.capture_id = None
841 # if the capture from TRex console was started before the connectivity step,
842 # it keeps 'service_mode' enabled, otherwise, it disables the 'service_mode'
843 if not self.config.service_mode:
844 self.client.set_service_mode(ports=self.port_handle, enabled=False)
847 """Cleanup Trex driver."""
850 self.client.reset(self.port_handle)
851 self.client.disconnect()
853 # TRex does not like a reset while in disconnected state
856 def set_service_mode(self, enabled=True):
857 """Enable/disable the 'service_mode'."""
858 self.client.set_service_mode(ports=self.port_handle, enabled=enabled)