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 if stream_cfg['vxlan'] is True:
486 streams.append(STLStream(packet=pkt,
487 flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id,
489 mode=STLTXCont(pps=self.LATENCY_PPS)))
491 streams.append(STLStream(packet=pkt,
492 flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id),
493 mode=STLTXCont(pps=self.LATENCY_PPS)))
497 def __connect(self, client):
500 def __connect_after_start(self):
501 # after start, Trex may take a bit of time to initialize
502 # so we need to retry a few times
503 for it in xrange(self.config.generic_retry_count):
506 self.client.connect()
508 except Exception as ex:
509 if it == (self.config.generic_retry_count - 1):
511 LOG.info("Retrying connection to TRex (%s)...", ex.message)
514 """Connect to the TRex server."""
515 server_ip = self.generator_config.ip
516 LOG.info("Connecting to TRex (%s)...", server_ip)
518 # Connect to TRex server
519 self.client = STLClient(server=server_ip, sync_port=self.generator_config.zmq_rpc_port,
520 async_port=self.generator_config.zmq_pub_port)
522 self.__connect(self.client)
523 if server_ip == '127.0.0.1':
524 config_updated = self.__check_config()
525 if config_updated or self.config.restart:
527 except (TimeoutError, STLError) as e:
528 if server_ip == '127.0.0.1':
529 self.__start_local_server()
531 raise TrafficGeneratorException(e.message)
533 ports = list(self.generator_config.ports)
534 self.port_handle = ports
536 self.client.reset(ports)
537 # Read HW information from each port
538 # this returns an array of dict (1 per port)
540 Example of output for Intel XL710
541 [{'arp': '-', 'src_ipv4': '-', u'supp_speeds': [40000], u'is_link_supported': True,
542 'grat_arp': 'off', 'speed': 40, u'index': 0, 'link_change_supported': 'yes',
543 u'rx': {u'counters': 127, u'caps': [u'flow_stats', u'latency']},
544 u'is_virtual': 'no', 'prom': 'off', 'src_mac': u'3c:fd:fe:a8:24:48', 'status': 'IDLE',
545 u'description': u'Ethernet Controller XL710 for 40GbE QSFP+',
546 'dest': u'fa:16:3e:3c:63:04', u'is_fc_supported': False, 'vlan': '-',
547 u'driver': u'net_i40e', 'led_change_supported': 'yes', 'rx_filter_mode': 'hardware match',
548 'fc': 'none', 'link': 'UP', u'hw_mac': u'3c:fd:fe:a8:24:48', u'pci_addr': u'0000:5e:00.0',
549 'mult': 'off', 'fc_supported': 'no', u'is_led_supported': True, 'rx_queue': 'off',
550 'layer_mode': 'Ethernet', u'numa': 0}, ...]
552 self.port_info = self.client.get_port_info(ports)
553 LOG.info('Connected to TRex')
554 for id, port in enumerate(self.port_info):
555 LOG.info(' Port %d: %s speed=%dGbps mac=%s pci=%s driver=%s',
556 id, port['description'], port['speed'], port['src_mac'],
557 port['pci_addr'], port['driver'])
558 # Make sure the 2 ports have the same speed
559 if self.port_info[0]['speed'] != self.port_info[1]['speed']:
560 raise TrafficGeneratorException('Traffic generator ports speed mismatch: %d/%d Gbps' %
561 (self.port_info[0]['speed'],
562 self.port_info[1]['speed']))
564 def __start_local_server(self):
566 LOG.info("Starting TRex ...")
567 self.__start_server()
568 self.__connect_after_start()
569 except (TimeoutError, STLError) as e:
570 LOG.error('Cannot connect to TRex')
571 LOG.error(traceback.format_exc())
572 logpath = '/tmp/trex.log'
573 if os.path.isfile(logpath):
574 # Wait for TRex to finish writing error message
576 for _ in xrange(self.config.generic_retry_count):
577 size = os.path.getsize(logpath)
578 if size == last_size:
579 # probably not writing anymore
583 with open(logpath, 'r') as f:
587 raise TrafficGeneratorException(message)
589 def __start_server(self):
590 server = TRexTrafficServer()
591 server.run_server(self.generator_config)
593 def __check_config(self):
594 server = TRexTrafficServer()
595 return server.check_config_updated(self.generator_config)
598 LOG.info("Restarting TRex ...")
600 # Wait for server stopped
601 for _ in xrange(self.config.generic_retry_count):
603 if not self.client.is_connected():
604 LOG.info("TRex is stopped...")
606 self.__start_local_server()
608 def __stop_server(self):
609 if self.generator_config.ip == '127.0.0.1':
610 ports = self.client.get_acquired_ports()
611 LOG.info('Release ports %s and stopping TRex...', ports)
614 self.client.release(ports=ports)
615 self.client.server_shutdown()
616 except STLError as e:
617 LOG.warn('Unable to stop TRex. Error: %s', e)
619 LOG.info('Using remote TRex. Unable to stop TRex')
621 def resolve_arp(self):
622 """Resolve all configured remote IP addresses.
624 return: None if ARP failed to resolve for all IP addresses
625 else a dict of list of dest macs indexed by port#
626 the dest macs in the list are indexed by the chain id
628 self.client.set_service_mode(ports=self.port_handle)
629 LOG.info('Polling ARP until successful...')
631 for port, device in zip(self.port_handle, self.generator_config.devices):
632 # there should be 1 stream config per chain
633 stream_configs = device.get_stream_configs()
634 chain_count = len(stream_configs)
635 ctx = self.client.create_service_ctx(port=port)
636 # all dest macs on this port indexed by chain ID
637 dst_macs = [None] * chain_count
639 # the index in the list is the chain id
640 if self.config.vxlan:
643 src_ip=device.vtep_src_ip,
644 dst_ip=device.vtep_dst_ip,
645 vlan=device.vtep_vlan)
646 for cfg in stream_configs
651 src_ip=cfg['ip_src_tg_gw'],
652 dst_ip=cfg['mac_discovery_gw'],
653 # will be None if no vlan tagging
654 vlan=cfg['vlan_tag'])
655 for cfg in stream_configs
658 for attempt in range(self.config.generic_retry_count):
662 LOG.error(traceback.format_exc())
666 for chain_id, mac in enumerate(dst_macs):
668 arp_record = arps[chain_id].get_record()
669 if arp_record.dst_mac:
670 dst_macs[chain_id] = arp_record.dst_mac
672 LOG.info(' ARP: port=%d chain=%d src IP=%s dst IP=%s -> MAC=%s',
675 arp_record.dst_ip, arp_record.dst_mac)
677 unresolved.append(arp_record.dst_ip)
678 if dst_macs_count == chain_count:
679 arp_dest_macs[port] = dst_macs
680 LOG.info('ARP resolved successfully for port %s', port)
684 LOG.info('Retrying ARP for: %s (retry %d/%d)',
685 unresolved, retry, self.config.generic_retry_count)
686 if retry < self.config.generic_retry_count:
687 time.sleep(self.config.generic_poll_sec)
689 LOG.error('ARP timed out for port %s (resolved %d out of %d)',
695 self.client.set_service_mode(ports=self.port_handle, enabled=False)
696 if len(arp_dest_macs) == len(self.port_handle):
700 def __is_rate_enough(self, l2frame_size, rates, bidirectional, latency):
701 """Check if rate provided by user is above requirements. Applies only if latency is True."""
702 intf_speed = self.generator_config.intf_speed
708 r = utils.convert_rates(l2frame_size, rate, intf_speed)
709 total_rate += int(r['rate_pps'])
712 total_rate = utils.convert_rates(l2frame_size, rates[0], intf_speed)
713 # rate must be enough for latency stream and at least 1 pps for base stream per chain
714 required_rate = (self.LATENCY_PPS + 1) * self.config.service_chain_count * mult
715 result = utils.convert_rates(l2frame_size,
716 {'rate_pps': required_rate},
718 result['result'] = total_rate >= required_rate
721 return {'result': True}
723 def create_traffic(self, l2frame_size, rates, bidirectional, latency=True, e2e=False):
724 """Program all the streams in Trex server.
726 l2frame_size: L2 frame size or IMIX
727 rates: a list of 2 rates to run each direction
728 each rate is a dict like {'rate_pps': '10kpps'}
729 bidirectional: True if bidirectional
730 latency: True if latency measurement is needed
731 e2e: True if performing "end to end" connectivity check
733 r = self.__is_rate_enough(l2frame_size, rates, bidirectional, latency)
735 raise TrafficGeneratorException(
736 'Required rate in total is at least one of: \n{pps}pps \n{bps}bps \n{load}%.'
737 .format(pps=r['rate_pps'],
739 load=r['rate_percent']))
740 # a dict of list of streams indexed by port#
741 # in case of fixed size, has self.chain_count * 2 * 2 streams
742 # (1 normal + 1 latency stream per direction per chain)
743 # for IMIX, has self.chain_count * 2 * 4 streams
744 # (3 normal + 1 latency stream per direction per chain)
746 for port in self.port_handle:
747 streamblock[port] = []
748 stream_cfgs = [d.get_stream_configs() for d in self.generator_config.devices]
749 self.rates = [utils.to_rate_str(rate) for rate in rates]
750 for chain_id, (fwd_stream_cfg, rev_stream_cfg) in enumerate(zip(*stream_cfgs)):
751 streamblock[0].extend(self.generate_streams(self.port_handle[0],
757 if len(self.rates) > 1:
758 streamblock[1].extend(self.generate_streams(self.port_handle[1],
762 latency=bidirectional and latency,
765 for port in self.port_handle:
766 if self.config.vxlan:
767 self.client.set_port_attr(ports=port, vxlan_fs=[4789])
769 self.client.set_port_attr(ports=port, vxlan_fs=None)
770 self.client.add_streams(streamblock[port], ports=port)
771 LOG.info('Created %d traffic streams for port %s.', len(streamblock[port]), port)
773 def clear_streamblock(self):
774 """Clear all streams from TRex."""
776 self.client.reset(self.port_handle)
777 LOG.info('Cleared all existing streams')
780 """Get stats from Trex."""
781 stats = self.client.get_stats()
782 return self.extract_stats(stats)
785 """Return the Trex local port MAC addresses.
787 return: a list of MAC addresses indexed by the port#
789 return [port['src_mac'] for port in self.port_info]
791 def get_port_speed_gbps(self):
792 """Return the Trex local port MAC addresses.
794 return: a list of speed in Gbps indexed by the port#
796 return [port['speed'] for port in self.port_info]
798 def clear_stats(self):
799 """Clear all stats in the traffic gneerator."""
801 self.client.clear_stats()
803 def start_traffic(self):
804 """Start generating traffic in all ports."""
805 for port, rate in zip(self.port_handle, self.rates):
806 self.client.start(ports=port, mult=rate, duration=self.config.duration_sec, force=True)
808 def stop_traffic(self):
809 """Stop generating traffic."""
810 self.client.stop(ports=self.port_handle)
812 def start_capture(self):
813 """Capture all packets on both ports that are unicast to us."""
816 # Need to filter out unwanted packets so we do not end up counting
817 # src MACs of frames that are not unicast to us
818 src_mac_list = self.get_macs()
819 bpf_filter = "ether dst %s or ether dst %s" % (src_mac_list[0], src_mac_list[1])
820 # ports must be set in service in order to enable capture
821 self.client.set_service_mode(ports=self.port_handle)
822 self.capture_id = self.client.start_capture(rx_ports=self.port_handle,
823 bpf_filter=bpf_filter)
825 def fetch_capture_packets(self):
826 """Fetch capture packets in capture mode."""
828 self.packet_list = []
829 self.client.fetch_capture_packets(capture_id=self.capture_id['id'],
830 output=self.packet_list)
832 def stop_capture(self):
833 """Stop capturing packets."""
835 self.client.stop_capture(capture_id=self.capture_id['id'])
836 self.capture_id = None
837 self.client.set_service_mode(ports=self.port_handle, enabled=False)
840 """Cleanup Trex driver."""
843 self.client.reset(self.port_handle)
844 self.client.disconnect()
846 # TRex does not like a reset while in disconnected state