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, vm=STLScVmRaw(vm_param))
427 def generate_streams(self, port, chain_id, stream_cfg, l2frame, latency=True,
429 """Create a list of streams corresponding to a given chain and stream config.
431 port: port where the streams originate (0 or 1)
432 chain_id: the chain to which the streams are associated to
433 stream_cfg: stream configuration
434 l2frame: L2 frame size (including 4-byte FCS) or 'IMIX'
435 latency: if True also create a latency stream
436 e2e: True if performing "end to end" connectivity check
439 pg_id, lat_pg_id = self.get_pg_id(port, chain_id)
440 if l2frame == 'IMIX':
441 for ratio, l2_frame_size in zip(IMIX_RATIOS, IMIX_L2_SIZES):
442 pkt = self._create_pkt(stream_cfg, l2_frame_size)
444 streams.append(STLStream(packet=pkt,
445 mode=STLTXCont(pps=ratio)))
447 if stream_cfg['vxlan'] is True:
448 streams.append(STLStream(packet=pkt,
449 flow_stats=STLFlowStats(pg_id=pg_id,
451 mode=STLTXCont(pps=ratio)))
453 streams.append(STLStream(packet=pkt,
454 flow_stats=STLFlowStats(pg_id=pg_id),
455 mode=STLTXCont(pps=ratio)))
458 # for IMIX, the latency packets have the average IMIX packet size
459 pkt = self._create_pkt(stream_cfg, IMIX_AVG_L2_FRAME_SIZE)
462 l2frame_size = int(l2frame)
463 pkt = self._create_pkt(stream_cfg, l2frame_size)
465 streams.append(STLStream(packet=pkt,
468 if stream_cfg['vxlan'] is True:
469 streams.append(STLStream(packet=pkt,
470 flow_stats=STLFlowStats(pg_id=pg_id,
474 streams.append(STLStream(packet=pkt,
475 flow_stats=STLFlowStats(pg_id=pg_id),
477 # for the latency stream, the minimum payload is 16 bytes even in case of vlan tagging
478 # without vlan, the min l2 frame size is 64
480 # This only applies to the latency stream
481 if latency and stream_cfg['vlan_tag'] and l2frame_size < 68:
482 pkt = self._create_pkt(stream_cfg, 68)
485 # TRex limitation: VXLAN skip is not supported for latency stream
486 streams.append(STLStream(packet=pkt,
487 flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id),
488 mode=STLTXCont(pps=self.LATENCY_PPS)))
492 def __connect(self, client):
495 def __connect_after_start(self):
496 # after start, Trex may take a bit of time to initialize
497 # so we need to retry a few times
498 for it in xrange(self.config.generic_retry_count):
501 self.client.connect()
503 except Exception as ex:
504 if it == (self.config.generic_retry_count - 1):
506 LOG.info("Retrying connection to TRex (%s)...", ex.message)
509 """Connect to the TRex server."""
510 server_ip = self.generator_config.ip
511 LOG.info("Connecting to TRex (%s)...", server_ip)
513 # Connect to TRex server
514 self.client = STLClient(server=server_ip, sync_port=self.generator_config.zmq_rpc_port,
515 async_port=self.generator_config.zmq_pub_port)
517 self.__connect(self.client)
518 if server_ip == '127.0.0.1':
519 config_updated = self.__check_config()
520 if config_updated or self.config.restart:
522 except (TimeoutError, STLError) as e:
523 if server_ip == '127.0.0.1':
524 self.__start_local_server()
526 raise TrafficGeneratorException(e.message)
528 ports = list(self.generator_config.ports)
529 self.port_handle = ports
531 self.client.reset(ports)
532 # Read HW information from each port
533 # this returns an array of dict (1 per port)
535 Example of output for Intel XL710
536 [{'arp': '-', 'src_ipv4': '-', u'supp_speeds': [40000], u'is_link_supported': True,
537 'grat_arp': 'off', 'speed': 40, u'index': 0, 'link_change_supported': 'yes',
538 u'rx': {u'counters': 127, u'caps': [u'flow_stats', u'latency']},
539 u'is_virtual': 'no', 'prom': 'off', 'src_mac': u'3c:fd:fe:a8:24:48', 'status': 'IDLE',
540 u'description': u'Ethernet Controller XL710 for 40GbE QSFP+',
541 'dest': u'fa:16:3e:3c:63:04', u'is_fc_supported': False, 'vlan': '-',
542 u'driver': u'net_i40e', 'led_change_supported': 'yes', 'rx_filter_mode': 'hardware match',
543 'fc': 'none', 'link': 'UP', u'hw_mac': u'3c:fd:fe:a8:24:48', u'pci_addr': u'0000:5e:00.0',
544 'mult': 'off', 'fc_supported': 'no', u'is_led_supported': True, 'rx_queue': 'off',
545 'layer_mode': 'Ethernet', u'numa': 0}, ...]
547 self.port_info = self.client.get_port_info(ports)
548 LOG.info('Connected to TRex')
549 for id, port in enumerate(self.port_info):
550 LOG.info(' Port %d: %s speed=%dGbps mac=%s pci=%s driver=%s',
551 id, port['description'], port['speed'], port['src_mac'],
552 port['pci_addr'], port['driver'])
553 # Make sure the 2 ports have the same speed
554 if self.port_info[0]['speed'] != self.port_info[1]['speed']:
555 raise TrafficGeneratorException('Traffic generator ports speed mismatch: %d/%d Gbps' %
556 (self.port_info[0]['speed'],
557 self.port_info[1]['speed']))
559 def __start_local_server(self):
561 LOG.info("Starting TRex ...")
562 self.__start_server()
563 self.__connect_after_start()
564 except (TimeoutError, STLError) as e:
565 LOG.error('Cannot connect to TRex')
566 LOG.error(traceback.format_exc())
567 logpath = '/tmp/trex.log'
568 if os.path.isfile(logpath):
569 # Wait for TRex to finish writing error message
571 for _ in xrange(self.config.generic_retry_count):
572 size = os.path.getsize(logpath)
573 if size == last_size:
574 # probably not writing anymore
578 with open(logpath, 'r') as f:
582 raise TrafficGeneratorException(message)
584 def __start_server(self):
585 server = TRexTrafficServer()
586 server.run_server(self.generator_config)
588 def __check_config(self):
589 server = TRexTrafficServer()
590 return server.check_config_updated(self.generator_config)
593 LOG.info("Restarting TRex ...")
595 # Wait for server stopped
596 for _ in xrange(self.config.generic_retry_count):
598 if not self.client.is_connected():
599 LOG.info("TRex is stopped...")
601 self.__start_local_server()
603 def __stop_server(self):
604 if self.generator_config.ip == '127.0.0.1':
605 ports = self.client.get_acquired_ports()
606 LOG.info('Release ports %s and stopping TRex...', ports)
609 self.client.release(ports=ports)
610 self.client.server_shutdown()
611 except STLError as e:
612 LOG.warn('Unable to stop TRex. Error: %s', e)
614 LOG.info('Using remote TRex. Unable to stop TRex')
616 def resolve_arp(self):
617 """Resolve all configured remote IP addresses.
619 return: None if ARP failed to resolve for all IP addresses
620 else a dict of list of dest macs indexed by port#
621 the dest macs in the list are indexed by the chain id
623 self.client.set_service_mode(ports=self.port_handle)
624 LOG.info('Polling ARP until successful...')
626 for port, device in zip(self.port_handle, self.generator_config.devices):
627 # there should be 1 stream config per chain
628 stream_configs = device.get_stream_configs()
629 chain_count = len(stream_configs)
630 ctx = self.client.create_service_ctx(port=port)
631 # all dest macs on this port indexed by chain ID
632 dst_macs = [None] * chain_count
634 # the index in the list is the chain id
635 if self.config.vxlan:
638 src_ip=device.vtep_src_ip,
639 dst_ip=device.vtep_dst_ip,
640 vlan=device.vtep_vlan)
641 for cfg in stream_configs
646 src_ip=cfg['ip_src_tg_gw'],
647 dst_ip=cfg['mac_discovery_gw'],
648 # will be None if no vlan tagging
649 vlan=cfg['vlan_tag'])
650 for cfg in stream_configs
653 for attempt in range(self.config.generic_retry_count):
657 LOG.error(traceback.format_exc())
661 for chain_id, mac in enumerate(dst_macs):
663 arp_record = arps[chain_id].get_record()
664 if arp_record.dst_mac:
665 dst_macs[chain_id] = arp_record.dst_mac
667 LOG.info(' ARP: port=%d chain=%d src IP=%s dst IP=%s -> MAC=%s',
670 arp_record.dst_ip, arp_record.dst_mac)
672 unresolved.append(arp_record.dst_ip)
673 if dst_macs_count == chain_count:
674 arp_dest_macs[port] = dst_macs
675 LOG.info('ARP resolved successfully for port %s', port)
679 LOG.info('Retrying ARP for: %s (retry %d/%d)',
680 unresolved, retry, self.config.generic_retry_count)
681 if retry < self.config.generic_retry_count:
682 time.sleep(self.config.generic_poll_sec)
684 LOG.error('ARP timed out for port %s (resolved %d out of %d)',
690 self.client.set_service_mode(ports=self.port_handle, enabled=False)
691 if len(arp_dest_macs) == len(self.port_handle):
695 def __is_rate_enough(self, l2frame_size, rates, bidirectional, latency):
696 """Check if rate provided by user is above requirements. Applies only if latency is True."""
697 intf_speed = self.generator_config.intf_speed
703 r = utils.convert_rates(l2frame_size, rate, intf_speed)
704 total_rate += int(r['rate_pps'])
707 total_rate = utils.convert_rates(l2frame_size, rates[0], intf_speed)
708 # rate must be enough for latency stream and at least 1 pps for base stream per chain
709 required_rate = (self.LATENCY_PPS + 1) * self.config.service_chain_count * mult
710 result = utils.convert_rates(l2frame_size,
711 {'rate_pps': required_rate},
713 result['result'] = total_rate >= required_rate
716 return {'result': True}
718 def create_traffic(self, l2frame_size, rates, bidirectional, latency=True, e2e=False):
719 """Program all the streams in Trex server.
721 l2frame_size: L2 frame size or IMIX
722 rates: a list of 2 rates to run each direction
723 each rate is a dict like {'rate_pps': '10kpps'}
724 bidirectional: True if bidirectional
725 latency: True if latency measurement is needed
726 e2e: True if performing "end to end" connectivity check
728 r = self.__is_rate_enough(l2frame_size, rates, bidirectional, latency)
730 raise TrafficGeneratorException(
731 'Required rate in total is at least one of: \n{pps}pps \n{bps}bps \n{load}%.'
732 .format(pps=r['rate_pps'],
734 load=r['rate_percent']))
735 # a dict of list of streams indexed by port#
736 # in case of fixed size, has self.chain_count * 2 * 2 streams
737 # (1 normal + 1 latency stream per direction per chain)
738 # for IMIX, has self.chain_count * 2 * 4 streams
739 # (3 normal + 1 latency stream per direction per chain)
741 for port in self.port_handle:
742 streamblock[port] = []
743 stream_cfgs = [d.get_stream_configs() for d in self.generator_config.devices]
744 self.rates = [utils.to_rate_str(rate) for rate in rates]
745 for chain_id, (fwd_stream_cfg, rev_stream_cfg) in enumerate(zip(*stream_cfgs)):
746 streamblock[0].extend(self.generate_streams(self.port_handle[0],
752 if len(self.rates) > 1:
753 streamblock[1].extend(self.generate_streams(self.port_handle[1],
757 latency=bidirectional and latency,
760 for port in self.port_handle:
761 if self.config.vxlan:
762 self.client.set_port_attr(ports=port, vxlan_fs=[4789])
764 self.client.set_port_attr(ports=port, vxlan_fs=None)
765 self.client.add_streams(streamblock[port], ports=port)
766 LOG.info('Created %d traffic streams for port %s.', len(streamblock[port]), port)
768 def clear_streamblock(self):
769 """Clear all streams from TRex."""
771 self.client.reset(self.port_handle)
772 LOG.info('Cleared all existing streams')
775 """Get stats from Trex."""
776 stats = self.client.get_stats()
777 return self.extract_stats(stats)
780 """Return the Trex local port MAC addresses.
782 return: a list of MAC addresses indexed by the port#
784 return [port['src_mac'] for port in self.port_info]
786 def get_port_speed_gbps(self):
787 """Return the Trex local port MAC addresses.
789 return: a list of speed in Gbps indexed by the port#
791 return [port['speed'] for port in self.port_info]
793 def clear_stats(self):
794 """Clear all stats in the traffic gneerator."""
796 self.client.clear_stats()
798 def start_traffic(self):
799 """Start generating traffic in all ports."""
800 for port, rate in zip(self.port_handle, self.rates):
801 self.client.start(ports=port, mult=rate, duration=self.config.duration_sec, force=True)
803 def stop_traffic(self):
804 """Stop generating traffic."""
805 self.client.stop(ports=self.port_handle)
807 def start_capture(self):
808 """Capture all packets on both ports that are unicast to us."""
811 # Need to filter out unwanted packets so we do not end up counting
812 # src MACs of frames that are not unicast to us
813 src_mac_list = self.get_macs()
814 bpf_filter = "ether dst %s or ether dst %s" % (src_mac_list[0], src_mac_list[1])
815 # ports must be set in service in order to enable capture
816 self.client.set_service_mode(ports=self.port_handle)
817 self.capture_id = self.client.start_capture(rx_ports=self.port_handle,
818 bpf_filter=bpf_filter)
820 def fetch_capture_packets(self):
821 """Fetch capture packets in capture mode."""
823 self.packet_list = []
824 self.client.fetch_capture_packets(capture_id=self.capture_id['id'],
825 output=self.packet_list)
827 def stop_capture(self):
828 """Stop capturing packets."""
830 self.client.stop_capture(capture_id=self.capture_id['id'])
831 self.capture_id = None
832 self.client.set_service_mode(ports=self.port_handle, enabled=False)
835 """Cleanup Trex driver."""
838 self.client.reset(self.port_handle)
839 self.client.disconnect()
841 # TRex does not like a reset while in disconnected state