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authorSridhar Rao <sridhar.rao@spirent.com>2020-11-25 06:41:05 +0000
committerGerrit Code Review <gerrit@opnfv.org>2020-11-25 06:41:05 +0000
commitd3e04a4d7ce6cdbbc6375ee37264d1528a6ae622 (patch)
tree8f3a914b278bc25d543e075d4832c33d4643f0d2 /tools/pkt_gen/trex/trex_client.py
parent656acff48dfba2f2945a3baf8d696007b8229200 (diff)
parent33918409da9a5d4b60d57cd05f3277c6ff1918cd (diff)
Merge "Tools: User Latest Version of T-Rex."
Diffstat (limited to 'tools/pkt_gen/trex/trex_client.py')
-rw-r--r--tools/pkt_gen/trex/trex_client.py778
1 files changed, 778 insertions, 0 deletions
diff --git a/tools/pkt_gen/trex/trex_client.py b/tools/pkt_gen/trex/trex_client.py
new file mode 100644
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+++ b/tools/pkt_gen/trex/trex_client.py
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+# Copyright 2017 Martin Goldammer, OPNFV, Red Hat Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""
+Trex Traffic Generator Model
+"""
+
+# pylint: disable=undefined-variable
+import logging
+import subprocess
+import sys
+import time
+import os
+import re
+from collections import OrderedDict
+# pylint: disable=unused-import
+import netaddr
+#import zmq
+from conf import settings
+from conf import merge_spec
+from core.results.results_constants import ResultsConstants
+from tools.pkt_gen.trafficgen.trafficgen import ITrafficGenerator
+try:
+ # pylint: disable=wrong-import-position, import-error
+ sys.path.append(settings.getValue('PATHS')['trafficgen']['Trex']['src']['path'])
+ from trex_stl_lib.api import *
+ # from trex_stl_lib import trex_stl_exceptions
+except ImportError:
+ # VSPERF performs detection of T-Rex api during testcase initialization. So if
+ # T-Rex is requsted and API is not available it will fail before this code
+ # is reached.
+ # This code can be reached in case that --list-trafficgens is called, but T-Rex
+ # api is not installed. In this case we can ignore an exception, becuase T-Rex
+ # import won't be used.
+ pass
+
+_EMPTY_STATS = {
+ 'global': {'bw_per_core': 0.0,
+ 'cpu_util': 0.0,
+ 'queue_full': 0.0,
+ 'rx_bps': 0.0,
+ 'rx_cpu_util': 0.0,
+ 'rx_drop_bps': 0.0,
+ 'rx_pps': 0.0,
+ 'tx_bps': 0.0,
+ 'tx_pps': 0.0,},
+ 'latency': {},
+ 'total': {'ibytes': 0.0,
+ 'ierrors': 0.0,
+ 'ipackets': 0.0,
+ 'obytes': 0.0,
+ 'oerrors': 0.0,
+ 'opackets': 0.0,
+ 'rx_bps': 0.0,
+ 'rx_bps_L1': 0.0,
+ 'rx_pps': 0.0,
+ 'rx_util': 0.0,
+ 'tx_bps': 0.0,
+ 'tx_bps_L1': 0.0,
+ 'tx_pps': 0.0,
+ 'tx_util': 0.0,}}
+
+# Default frame definition, which can be overridden by TRAFFIC['scapy'].
+# The content of the frame and its network layers are driven by TRAFFIC
+# dictionary, i.e. 'l2', 'l3, 'l4' and 'vlan' parts.
+_SCAPY_FRAME = {
+ '0' : 'Ether(src={Ether_src}, dst={Ether_dst})/'
+ 'Dot1Q(prio={Dot1Q_prio}, id={Dot1Q_id}, vlan={Dot1Q_vlan})/'
+ 'IP(proto={IP_proto}, src={IP_src}, dst={IP_dst})/'
+ '{IP_PROTO}(sport={IP_PROTO_sport}, dport={IP_PROTO_dport})',
+ '1' : 'Ether(src={Ether_dst}, dst={Ether_src})/'
+ 'Dot1Q(prio={Dot1Q_prio}, id={Dot1Q_id}, vlan={Dot1Q_vlan})/'
+ 'IP(proto={IP_proto}, src={IP_dst}, dst={IP_src})/'
+ '{IP_PROTO}(sport={IP_PROTO_dport}, dport={IP_PROTO_sport})',
+}
+
+
+class Trex(ITrafficGenerator):
+ """Trex Traffic generator wrapper."""
+ _logger = logging.getLogger(__name__)
+
+ def __init__(self):
+ """Trex class constructor."""
+ super().__init__()
+ self._logger.info("In trex __init__ method")
+ self._params = {}
+ self._trex_host_ip_addr = (
+ settings.getValue('TRAFFICGEN_TREX_HOST_IP_ADDR'))
+ self._trex_base_dir = (
+ settings.getValue('TRAFFICGEN_TREX_BASE_DIR'))
+ self._trex_user = settings.getValue('TRAFFICGEN_TREX_USER')
+ self._stlclient = None
+ self._verification_params = None
+ self._show_packet_data = False
+
+ def show_packet_info(self, packet_a, packet_b):
+ """
+ Log packet layers to screen
+ :param packet_a: Scapy.layers packet
+ :param packet_b: Scapy.layers packet
+ :return: None
+ """
+ # we only want to show packet data once per test
+ if self._show_packet_data:
+ self._show_packet_data = False
+ self._logger.info(packet_a.show())
+ self._logger.info(packet_b.show())
+
+ def connect(self):
+ '''Connect to Trex traffic generator
+
+ Verify that Trex is on the system indicated by
+ the configuration file
+ '''
+ self._stlclient = STLClient()
+ self._logger.info("T-Rex: In Trex connect method...")
+ if self._trex_host_ip_addr:
+ cmd_ping = "ping -c1 " + self._trex_host_ip_addr
+ else:
+ raise RuntimeError('T-Rex: Trex host not defined')
+
+ ping = subprocess.Popen(cmd_ping, shell=True, stderr=subprocess.PIPE)
+ output, error = ping.communicate()
+
+ if ping.returncode:
+ self._logger.error(error)
+ self._logger.error(output)
+ raise RuntimeError('T-Rex: Cannot ping Trex host at ' + \
+ self._trex_host_ip_addr)
+
+ connect_trex = "ssh " + self._trex_user + \
+ "@" + self._trex_host_ip_addr
+
+ cmd_find_trex = connect_trex + " ls " + \
+ self._trex_base_dir + "t-rex-64"
+
+
+ find_trex = subprocess.Popen(cmd_find_trex,
+ shell=True,
+ stderr=subprocess.PIPE)
+ output, error = find_trex.communicate()
+
+ if find_trex.returncode:
+ self._logger.error(error)
+ self._logger.error(output)
+ raise RuntimeError(
+ 'T-Rex: Cannot locate Trex program at %s within %s' \
+ % (self._trex_host_ip_addr, self._trex_base_dir))
+
+ try:
+ self._stlclient = STLClient(username=self._trex_user, server=self._trex_host_ip_addr,
+ verbose_level='info')
+ self._stlclient.connect()
+ except STLError:
+ raise RuntimeError('T-Rex: Cannot connect to T-Rex server. Please check if it is '
+ 'running and that firewall allows connection to TCP port 4501.')
+
+ self._logger.info("T-Rex: Trex host successfully found...")
+
+ def disconnect(self):
+ """Disconnect from the traffic generator.
+
+ As with :func:`connect`, this function is optional.
+
+ Where implemented, this function should raise an exception on
+ failure.
+
+ :returns: None
+ """
+ self._logger.info("T-Rex: In trex disconnect method")
+ self._stlclient.disconnect(stop_traffic=True, release_ports=True)
+
+ def create_packets(self, traffic, ports_info):
+ """Create base packet according to traffic specification.
+ If traffic haven't specified srcmac and dstmac fields
+ packet will be created with mac address of trex server.
+ """
+ if not traffic or traffic['l2']['framesize'] <= 0:
+ return (None, None)
+
+ if traffic['l2']['dstmac'] == '00:00:00:00:00:00' and \
+ traffic['l2']['srcmac'] == '00:00:00:00:00:00':
+
+ mac_add = [li['hw_mac'] for li in ports_info]
+ src_mac = mac_add[0]
+ dst_mac = mac_add[1]
+ else:
+ src_mac = traffic['l2']['srcmac']
+ dst_mac = traffic['l2']['dstmac']
+
+ if traffic['scapy']['enabled']:
+ base_pkt_a = traffic['scapy']['0']
+ base_pkt_b = traffic['scapy']['1']
+ else:
+ base_pkt_a = _SCAPY_FRAME['0']
+ base_pkt_b = _SCAPY_FRAME['1']
+
+ # check and remove network layers disabled by TRAFFIC dictionary
+ # Note: In general, it is possible to remove layers from scapy object by
+ # e.g. del base_pkt_a['IP']. However it doesn't work for all layers
+ # (e.g. Dot1Q). Thus it is safer to modify string with scapy frame definition
+ # directly, before it is converted to the real scapy object.
+ if not traffic['vlan']['enabled']:
+ self._logger.info('VLAN headers are disabled by TRAFFIC')
+ base_pkt_a = re.sub(r'(^|\/)Dot1Q?\([^\)]*\)', '', base_pkt_a)
+ base_pkt_b = re.sub(r'(^|\/)Dot1Q?\([^\)]*\)', '', base_pkt_b)
+ if not traffic['l3']['enabled']:
+ self._logger.info('IP headers are disabled by TRAFFIC')
+ base_pkt_a = re.sub(r'(^|\/)IP(v6)?\([^\)]*\)', '', base_pkt_a)
+ base_pkt_b = re.sub(r'(^|\/)IP(v6)?\([^\)]*\)', '', base_pkt_b)
+ if not traffic['l4']['enabled']:
+ self._logger.info('%s headers are disabled by TRAFFIC',
+ traffic['l3']['proto'].upper())
+ base_pkt_a = re.sub(r'(^|\/)(UDP|TCP|SCTP|{{IP_PROTO}}|{})\([^\)]*\)'.format(
+ traffic['l3']['proto'].upper()), '', base_pkt_a)
+ base_pkt_b = re.sub(r'(^|\/)(UDP|TCP|SCTP|{{IP_PROTO}}|{})\([^\)]*\)'.format(
+ traffic['l3']['proto'].upper()), '', base_pkt_b)
+
+ # pylint: disable=eval-used
+ base_pkt_a = eval(base_pkt_a.format(
+ Ether_src=repr(src_mac),
+ Ether_dst=repr(dst_mac),
+ Dot1Q_prio=traffic['vlan']['priority'],
+ Dot1Q_id=traffic['vlan']['cfi'],
+ Dot1Q_vlan=traffic['vlan']['id'],
+ IP_proto=repr(traffic['l3']['proto']),
+ IP_PROTO=traffic['l3']['proto'].upper(),
+ IP_src=repr(traffic['l3']['srcip']),
+ IP_dst=repr(traffic['l3']['dstip']),
+ IP_PROTO_sport=traffic['l4']['srcport'],
+ IP_PROTO_dport=traffic['l4']['dstport']))
+ base_pkt_b = eval(base_pkt_b.format(
+ Ether_src=repr(src_mac),
+ Ether_dst=repr(dst_mac),
+ Dot1Q_prio=traffic['vlan']['priority'],
+ Dot1Q_id=traffic['vlan']['cfi'],
+ Dot1Q_vlan=traffic['vlan']['id'],
+ IP_proto=repr(traffic['l3']['proto']),
+ IP_PROTO=traffic['l3']['proto'].upper(),
+ IP_src=repr(traffic['l3']['srcip']),
+ IP_dst=repr(traffic['l3']['dstip']),
+ IP_PROTO_sport=traffic['l4']['srcport'],
+ IP_PROTO_dport=traffic['l4']['dstport']))
+
+ return (base_pkt_a, base_pkt_b)
+
+ @staticmethod
+ def create_streams(base_pkt_a, base_pkt_b, traffic):
+ """Add the base packet to the streams. Erase FCS and add payload
+ according to traffic specification
+ """
+ stream_1_lat = None
+ stream_2_lat = None
+ frame_size = int(traffic['l2']['framesize'])
+ fsize_no_fcs = frame_size - 4
+ payload_a = max(0, fsize_no_fcs - len(base_pkt_a)) * 'x'
+ payload_b = max(0, fsize_no_fcs - len(base_pkt_b)) * 'x'
+
+ # Multistream configuration, increments source values only
+ ms_mod = list() # mod list for incrementing values to be populated based on layer
+ if traffic['multistream'] > 1:
+ if traffic['stream_type'].upper() == 'L2':
+ for _ in [base_pkt_a, base_pkt_b]:
+ ms_mod += [STLVmFlowVar(name="mac_start", min_value=0,
+ max_value=traffic['multistream'] - 1, size=4, op="inc"),
+ STLVmWrFlowVar(fv_name="mac_start", pkt_offset=7)]
+ elif traffic['stream_type'].upper() == 'L3':
+ ip_src = {"start": int(netaddr.IPAddress(traffic['l3']['srcip'])),
+ "end": int(netaddr.IPAddress(traffic['l3']['srcip'])) + traffic['multistream'] - 1}
+ ip_dst = {"start": int(netaddr.IPAddress(traffic['l3']['dstip'])),
+ "end": int(netaddr.IPAddress(traffic['l3']['dstip'])) + traffic['multistream'] - 1}
+ for ip_address in [ip_src, ip_dst]:
+ ms_mod += [STLVmFlowVar(name="ip_src", min_value=ip_address['start'],
+ max_value=ip_address['end'], size=4, op="inc"),
+ STLVmWrFlowVar(fv_name="ip_src", pkt_offset="IP.src")]
+ elif traffic['stream_type'].upper() == 'L4':
+ for udpport in [traffic['l4']['srcport'], traffic['l4']['dstport']]:
+ if udpport + (traffic['multistream'] - 1) > 65535:
+ start_port = udpport
+ # find the max/min port number based on the loop around of 65535 to 0 if needed
+ minimum_value = 65535 - (traffic['multistream'] -1)
+ maximum_value = 65535
+ else:
+ start_port, minimum_value = udpport, udpport
+ maximum_value = start_port + (traffic['multistream'] - 1)
+ ms_mod += [STLVmFlowVar(name="port_src", init_value=start_port,
+ min_value=minimum_value, max_value=maximum_value,
+ size=2, op="inc"),
+ STLVmWrFlowVar(fv_name="port_src", pkt_offset="UDP.sport"),]
+
+ if ms_mod: # multistream detected
+ pkt_a = STLPktBuilder(pkt=base_pkt_a/payload_a, vm=[ms_mod[0], ms_mod[1]])
+ pkt_b = STLPktBuilder(pkt=base_pkt_b/payload_b, vm=[ms_mod[2], ms_mod[3]])
+ else:
+ pkt_a = STLPktBuilder(pkt=base_pkt_a / payload_a)
+ pkt_b = STLPktBuilder(pkt=base_pkt_b / payload_b)
+
+ lat_pps = settings.getValue('TRAFFICGEN_TREX_LATENCY_PPS')
+ if traffic['traffic_type'] == 'burst':
+ if lat_pps > 0:
+ # latency statistics are requested; in case of frame burst we can enable
+ # statistics for all frames
+ stream_1 = STLStream(packet=pkt_a,
+ flow_stats=STLFlowLatencyStats(pg_id=0),
+ name='stream_1',
+ mode=STLTXSingleBurst(percentage=traffic['frame_rate'],
+ total_pkts=traffic['burst_size']))
+ stream_2 = STLStream(packet=pkt_b,
+ flow_stats=STLFlowLatencyStats(pg_id=1),
+ name='stream_2',
+ mode=STLTXSingleBurst(percentage=traffic['frame_rate'],
+ total_pkts=traffic['burst_size']))
+ else:
+ stream_1 = STLStream(packet=pkt_a,
+ name='stream_1',
+ mode=STLTXSingleBurst(percentage=traffic['frame_rate'],
+ total_pkts=traffic['burst_size']))
+ stream_2 = STLStream(packet=pkt_b,
+ name='stream_2',
+ mode=STLTXSingleBurst(percentage=traffic['frame_rate'],
+ total_pkts=traffic['burst_size']))
+ else:
+ stream_1 = STLStream(packet=pkt_a,
+ name='stream_1',
+ mode=STLTXCont(percentage=traffic['frame_rate']))
+ stream_2 = STLStream(packet=pkt_b,
+ name='stream_2',
+ mode=STLTXCont(percentage=traffic['frame_rate']))
+ # workaround for latency statistics, which can't be enabled for streams
+ # with high framerate due to the huge performance impact
+ if lat_pps > 0:
+ stream_1_lat = STLStream(packet=pkt_a,
+ flow_stats=STLFlowLatencyStats(pg_id=0),
+ name='stream_1_lat',
+ mode=STLTXCont(pps=lat_pps))
+ stream_2_lat = STLStream(packet=pkt_b,
+ flow_stats=STLFlowLatencyStats(pg_id=1),
+ name='stream_2_lat',
+ mode=STLTXCont(pps=lat_pps))
+
+ return (stream_1, stream_2, stream_1_lat, stream_2_lat)
+
+
+ # pylint: disable=too-many-locals, too-many-statements
+ def generate_traffic(self, traffic, duration, disable_capture=False):
+ """The method that generate a stream
+ """
+ my_ports = [0, 1]
+
+ # initialize ports
+ self._stlclient.reset(my_ports)
+ self._stlclient.remove_all_captures()
+ self._stlclient.set_service_mode(ports=my_ports, enabled=False)
+
+ ports_info = self._stlclient.get_port_info(my_ports)
+
+ # get max support speed
+ max_speed = 0
+ if settings.getValue('TRAFFICGEN_TREX_FORCE_PORT_SPEED'):
+ max_speed = settings.getValue('TRAFFICGEN_TREX_PORT_SPEED')
+ elif ports_info[0]['supp_speeds']:
+ max_speed_1 = max(ports_info[0]['supp_speeds'])
+ max_speed_2 = max(ports_info[1]['supp_speeds'])
+ else:
+ # if max supported speed not in port info or set manually, just assume 10G
+ max_speed = 10000
+ if not max_speed:
+ # since we can only control both ports at once take the lower of the two
+ max_speed = min(max_speed_1, max_speed_2)
+ gbps_speed = (max_speed / 1000) * (float(traffic['frame_rate']) / 100.0)
+ self._logger.debug('Starting traffic at %s Gbps speed', gbps_speed)
+
+ # for SR-IOV
+ if settings.getValue('TRAFFICGEN_TREX_PROMISCUOUS'):
+ self._stlclient.set_port_attr(my_ports, promiscuous=True)
+
+ packet_1, packet_2 = self.create_packets(traffic, ports_info)
+ self.show_packet_info(packet_1, packet_2)
+ stream_1, stream_2, stream_1_lat, stream_2_lat = Trex.create_streams(packet_1, packet_2, traffic)
+ self._stlclient.add_streams(stream_1, ports=[0])
+ self._stlclient.add_streams(stream_2, ports=[1])
+
+ if stream_1_lat is not None:
+ self._stlclient.add_streams(stream_1_lat, ports=[0])
+ self._stlclient.add_streams(stream_2_lat, ports=[1])
+
+ # enable traffic capture if requested
+ pcap_id = {}
+ if traffic['capture']['enabled'] and not disable_capture:
+ for ports in ['tx_ports', 'rx_ports']:
+ if traffic['capture'][ports]:
+ pcap_dir = ports[:2]
+ self._logger.info("T-Rex starting %s traffic capture", pcap_dir.upper())
+ capture = {ports : traffic['capture'][ports],
+ 'limit' : traffic['capture']['count'],
+ 'bpf_filter' : traffic['capture']['filter']}
+ self._stlclient.set_service_mode(ports=traffic['capture'][ports], enabled=True)
+ pcap_id[pcap_dir] = self._stlclient.start_capture(**capture)
+
+ self._stlclient.clear_stats()
+ # if the user did not start up T-Rex server with more than default cores, use default mask.
+ # Otherwise use mask to take advantage of multiple cores.
+ try:
+ self._stlclient.start(ports=my_ports, force=True, duration=duration, mult="{}gbps".format(gbps_speed),
+ core_mask=self._stlclient.CORE_MASK_PIN)
+ except STLError:
+ self._stlclient.start(ports=my_ports, force=True, duration=duration, mult="{}gbps".format(gbps_speed))
+
+ if settings.getValue('TRAFFICGEN_TREX_LIVE_RESULTS'):
+ filec = os.path.join(settings.getValue('RESULTS_PATH'),
+ settings.getValue('TRAFFICGEN_TREX_LC_FILE'))
+ filee = os.path.join(settings.getValue('RESULTS_PATH'),
+ settings.getValue('TRAFFICGEN_TREX_LE_FILE'))
+ pgids = self._stlclient.get_active_pgids()
+ rx_port_0 = 1
+ tx_port_0 = 0
+ rx_port_1 = 0
+ tx_port_1 = 1
+ with open(filec, 'a') as fcp, open(filee, 'a') as fep:
+ fcp.write("ts,rx_port,tx_port,rx_pkts,tx_pkts,rx_pps,tx_pps,"+
+ "rx_bps_num,rx_bps_den,tx_bps_num,tx_bps_den\n")
+ fep.write('ts,dropped,ooo,dup,seq_too_high,seq_too_low\n')
+ while True:
+ tr_status = self._stlclient.is_traffic_active(ports=my_ports)
+ if not tr_status:
+ break
+ time.sleep(1)
+ stats = self._stlclient.get_pgid_stats(pgids['flow_stats'])
+ lat_stats = stats['latency'].get(0)
+ flow_stats_0 = stats['flow_stats'].get(0)
+ flow_stats_1 = stats['flow_stats'].get(1)
+ if flow_stats_0:
+ rx_pkts = flow_stats_0['rx_pkts'][rx_port_0]
+ tx_pkts = flow_stats_0['tx_pkts'][tx_port_0]
+ rx_pps = flow_stats_0['rx_pps'][rx_port_0]
+ tx_pps = flow_stats_0['tx_pps'][tx_port_0]
+ rx_bps = flow_stats_0['rx_bps'][rx_port_0]
+ tx_bps = flow_stats_0['tx_bps'][tx_port_0]
+ rx_bps_l1 = flow_stats_0['rx_bps_l1'][rx_port_0]
+ tx_bps_l1 = flow_stats_0['tx_bps_l1'][tx_port_0]
+ # https://github.com/cisco-system-traffic-generator/\
+ # trex-core/blob/master/scripts/automation/\
+ # trex_control_plane/interactive/trex/examples/\
+ # stl/stl_flow_latency_stats.py
+ fcp.write("{10},{8},{9},{0},{1},{2},{3},{4},{5},{6},{7}\n"
+ .format(rx_pkts, tx_pkts, rx_pps, tx_pps,
+ rx_bps, rx_bps_l1, tx_bps, tx_bps_l1,
+ rx_port_0, tx_port_0, time.time()))
+ if flow_stats_1:
+ rx_pkts = flow_stats_1['rx_pkts'][rx_port_1]
+ tx_pkts = flow_stats_1['tx_pkts'][tx_port_1]
+ rx_pps = flow_stats_1['rx_pps'][rx_port_1]
+ tx_pps = flow_stats_1['tx_pps'][tx_port_1]
+ rx_bps = flow_stats_1['rx_bps'][rx_port_1]
+ tx_bps = flow_stats_1['tx_bps'][tx_port_1]
+ rx_bps_l1 = flow_stats_1['rx_bps_l1'][rx_port_1]
+ tx_bps_l1 = flow_stats_1['tx_bps_l1'][tx_port_1]
+ fcp.write("{10},{8},{9},{0},{1},{2},{3},{4},{5},{6},{7}\n"
+ .format(rx_pkts, tx_pkts, rx_pps, tx_pps,
+ rx_bps, rx_bps_l1, tx_bps, tx_bps_l1,
+ rx_port_1, tx_port_1, time.time()))
+ if lat_stats:
+ drops = lat_stats['err_cntrs']['dropped']
+ ooo = lat_stats['err_cntrs']['out_of_order']
+ dup = lat_stats['err_cntrs']['dup']
+ sth = lat_stats['err_cntrs']['seq_too_high']
+ stl = lat_stats['err_cntrs']['seq_too_low']
+ fep.write('{5},{0},{1},{2},{3},{4}\n'
+ .format(drops, ooo, dup, sth, stl, time.time()))
+ else:
+ self._stlclient.wait_on_traffic(ports=my_ports)
+ stats = self._stlclient.get_stats(sync_now=True)
+
+ # export captured data into pcap file if possible
+ if pcap_id:
+ for pcap_dir in pcap_id:
+ pcap_file = 'capture_{}.pcap'.format(pcap_dir)
+ self._stlclient.stop_capture(pcap_id[pcap_dir]['id'],
+ os.path.join(settings.getValue('RESULTS_PATH'), pcap_file))
+ stats['capture_{}'.format(pcap_dir)] = pcap_file
+ self._logger.info("T-Rex writing %s traffic capture into %s", pcap_dir.upper(), pcap_file)
+ # disable service mode for all ports used by Trex
+ self._stlclient.set_service_mode(ports=my_ports, enabled=False)
+
+ return stats
+
+ @staticmethod
+ def calculate_results(stats):
+ """Calculate results from Trex statistic
+ """
+ result = OrderedDict()
+ result[ResultsConstants.TX_FRAMES] = (
+ stats["total"]["opackets"])
+ result[ResultsConstants.RX_FRAMES] = (
+ stats["total"]["ipackets"])
+ result[ResultsConstants.TX_RATE_FPS] = (
+ '{:.3f}'.format(
+ float(stats["total"]["tx_pps"])))
+
+ result[ResultsConstants.THROUGHPUT_RX_FPS] = (
+ '{:.3f}'.format(
+ float(stats["total"]["rx_pps"])))
+
+ result[ResultsConstants.TX_RATE_MBPS] = (
+ '{:.3f}'.format(
+ float(stats["total"]["tx_bps"] / 1000000)))
+ result[ResultsConstants.THROUGHPUT_RX_MBPS] = (
+ '{:.3f}'.format(
+ float(stats["total"]["rx_bps"] / 1000000)))
+
+ result[ResultsConstants.TX_RATE_PERCENT] = 'Unknown'
+
+ result[ResultsConstants.THROUGHPUT_RX_PERCENT] = 'Unknown'
+ if stats["total"]["opackets"]:
+ result[ResultsConstants.FRAME_LOSS_PERCENT] = (
+ '{:.3f}'.format(
+ float((stats["total"]["opackets"] - stats["total"]["ipackets"]) * 100 /
+ stats["total"]["opackets"])))
+ else:
+ result[ResultsConstants.FRAME_LOSS_PERCENT] = 100
+
+ if settings.getValue('TRAFFICGEN_TREX_LATENCY_PPS') > 0 and stats['latency']:
+ try:
+ result[ResultsConstants.MIN_LATENCY_NS] = (
+ '{:.3f}'.format(
+ (float(min(stats["latency"][0]["latency"]["total_min"],
+ stats["latency"][1]["latency"]["total_min"])))))
+ except TypeError:
+ result[ResultsConstants.MIN_LATENCY_NS] = 'Unknown'
+
+ try:
+ result[ResultsConstants.MAX_LATENCY_NS] = (
+ '{:.3f}'.format(
+ (float(max(stats["latency"][0]["latency"]["total_max"],
+ stats["latency"][1]["latency"]["total_max"])))))
+ except TypeError:
+ result[ResultsConstants.MAX_LATENCY_NS] = 'Unknown'
+
+ try:
+ result[ResultsConstants.AVG_LATENCY_NS] = (
+ '{:.3f}'.format(
+ float((stats["latency"][0]["latency"]["average"]+
+ stats["latency"][1]["latency"]["average"])/2)))
+ except TypeError:
+ result[ResultsConstants.AVG_LATENCY_NS] = 'Unknown'
+
+ else:
+ result[ResultsConstants.MIN_LATENCY_NS] = 'Unknown'
+ result[ResultsConstants.MAX_LATENCY_NS] = 'Unknown'
+ result[ResultsConstants.AVG_LATENCY_NS] = 'Unknown'
+
+ if 'capture_tx' in stats:
+ result[ResultsConstants.CAPTURE_TX] = stats['capture_tx']
+ if 'capture_rx' in stats:
+ result[ResultsConstants.CAPTURE_RX] = stats['capture_rx']
+ return result
+
+ def learning_packets(self, traffic):
+ """
+ Send learning packets before testing
+ :param traffic: traffic structure as per send_cont_traffic guidelines
+ :return: None
+ """
+ self._logger.info("T-Rex sending learning packets")
+ learning_thresh_traffic = copy.deepcopy(traffic)
+ learning_thresh_traffic["frame_rate"] = 1
+ self.generate_traffic(learning_thresh_traffic,
+ settings.getValue("TRAFFICGEN_TREX_LEARNING_DURATION"),
+ disable_capture=True)
+ self._logger.info("T-Rex finished learning packets")
+ time.sleep(3) # allow packets to complete before starting test traffic
+
+ def run_trials(self, traffic, boundaries, duration, lossrate):
+ """
+ Run rfc2544 trial loop
+ :param traffic: traffic profile dictionary
+ :param boundaries: A dictionary of three keys left, right, center to dictate
+ the highest, lowest, and starting point of the binary search.
+ Values are percentages of line rates for each key.
+ :param duration: length in seconds for trials
+ :param lossrate: loweset loss rate percentage calculated from
+ comparision between received and sent packets
+ :return: passing stats as dictionary
+ """
+ threshold = settings.getValue('TRAFFICGEN_TREX_RFC2544_TPUT_THRESHOLD')
+ max_repeat = settings.getValue('TRAFFICGEN_TREX_RFC2544_MAX_REPEAT')
+ loss_verification = settings.getValue('TRAFFICGEN_TREX_RFC2544_BINARY_SEARCH_LOSS_VERIFICATION')
+ if loss_verification:
+ self._logger.info("Running Binary Search with Loss Verification")
+ stats_ok = _EMPTY_STATS
+ new_params = copy.deepcopy(traffic)
+ iteration = 1
+ repeat = 0
+ left = boundaries['left']
+ right = boundaries['right']
+ center = boundaries['center']
+ self._logger.info('Starting RFC2544 trials')
+ while (right - left) > threshold:
+ stats = self.generate_traffic(new_params, duration)
+ test_lossrate = ((stats["total"]["opackets"] - stats[
+ "total"]["ipackets"]) * 100) / stats["total"]["opackets"]
+ if stats["total"]["ipackets"] == 0:
+ self._logger.error('No packets recieved. Test failed')
+ return _EMPTY_STATS
+ if settings.getValue('TRAFFICGEN_TREX_VERIFICATION_MODE'):
+ if test_lossrate <= lossrate:
+ # save the last passing trial for verification
+ self._verification_params = copy.deepcopy(new_params)
+ packets_lost = stats['total']['opackets'] - stats['total']['ipackets']
+ self._logger.debug("Iteration: %s, frame rate: %s, throughput_rx_fps: %s," +
+ " frames lost %s, frame_loss_percent: %s", iteration,
+ "{:.3f}".format(new_params['frame_rate']), stats['total']['rx_pps'],
+ packets_lost, "{:.3f}".format(test_lossrate))
+ if test_lossrate == 0.0 and new_params['frame_rate'] == traffic['frame_rate']:
+ return copy.deepcopy(stats)
+ elif test_lossrate > lossrate:
+ if loss_verification:
+ if repeat < max_repeat:
+ repeat += 1
+ iteration += 1
+ continue
+ else:
+ repeat = 0
+ right = center
+ center = (left + right) / 2
+ new_params = copy.deepcopy(traffic)
+ new_params['frame_rate'] = center
+ else:
+ if loss_verification:
+ repeat = 0
+ stats_ok = copy.deepcopy(stats)
+ left = center
+ center = (left + right) / 2
+ new_params = copy.deepcopy(traffic)
+ new_params['frame_rate'] = center
+ iteration += 1
+ return stats_ok
+
+ def send_cont_traffic(self, traffic=None, duration=30):
+ """See ITrafficGenerator for description
+ """
+ self._logger.info("In Trex send_cont_traffic method")
+ self._params.clear()
+
+ self._show_packet_data = True
+
+ self._params['traffic'] = self.traffic_defaults.copy()
+ if traffic:
+ self._params['traffic'] = merge_spec(
+ self._params['traffic'], traffic)
+
+ if settings.getValue('TRAFFICGEN_TREX_LEARNING_MODE'):
+ self.learning_packets(traffic)
+ self._logger.info("T-Rex sending traffic")
+ stats = self.generate_traffic(traffic, duration)
+
+ return self.calculate_results(stats)
+
+ def start_cont_traffic(self, traffic=None, duration=30):
+ raise NotImplementedError(
+ 'Trex start cont traffic not implemented')
+
+ def stop_cont_traffic(self):
+ """See ITrafficGenerator for description
+ """
+ raise NotImplementedError(
+ 'Trex stop_cont_traffic method not implemented')
+
+ def send_rfc2544_throughput(self, traffic=None, tests=1, duration=60,
+ lossrate=0.0):
+ """See ITrafficGenerator for description
+ """
+ self._logger.info("In Trex send_rfc2544_throughput method")
+ self._params.clear()
+ self._show_packet_data = True
+ self._params['traffic'] = self.traffic_defaults.copy()
+ if traffic:
+ self._params['traffic'] = merge_spec(
+ self._params['traffic'], traffic)
+ if settings.getValue('TRAFFICGEN_TREX_LEARNING_MODE'):
+ self.learning_packets(traffic)
+ self._verification_params = copy.deepcopy(traffic)
+
+ binary_bounds = {'right' : traffic['frame_rate'],
+ 'left' : 0,
+ 'center': traffic['frame_rate'],}
+
+ # Loops until the preconfigured differencde between frame rate
+ # of successful and unsuccessful iterations is reached
+ stats_ok = self.run_trials(boundaries=binary_bounds, duration=duration,
+ lossrate=lossrate, traffic=traffic)
+ if settings.getValue('TRAFFICGEN_TREX_VERIFICATION_MODE'):
+ verification_iterations = 1
+ while verification_iterations <= settings.getValue('TRAFFICGEN_TREX_MAXIMUM_VERIFICATION_TRIALS'):
+ self._logger.info('Starting Trex Verification trial for %s seconds at frame rate %s',
+ settings.getValue('TRAFFICGEN_TREX_VERIFICATION_DURATION'),
+ self._verification_params['frame_rate'])
+ stats = self.generate_traffic(self._verification_params,
+ settings.getValue('TRAFFICGEN_TREX_VERIFICATION_DURATION'))
+ verification_lossrate = ((stats["total"]["opackets"] - stats[
+ "total"]["ipackets"]) * 100) / stats["total"]["opackets"]
+ if verification_lossrate <= lossrate:
+ self._logger.info('Trex Verification passed, %s packets were lost',
+ stats["total"]["opackets"] - stats["total"]["ipackets"])
+ stats_ok = copy.deepcopy(stats)
+ break
+ else:
+ self._logger.info('Trex Verification failed, %s packets were lost',
+ stats["total"]["opackets"] - stats["total"]["ipackets"])
+ new_right = self._verification_params['frame_rate'] - settings.getValue(
+ 'TRAFFICGEN_TREX_RFC2544_TPUT_THRESHOLD')
+ self._verification_params['frame_rate'] = new_right
+ binary_bounds = {'right': new_right,
+ 'left': 0,
+ 'center': new_right,}
+ stats_ok = self.run_trials(boundaries=binary_bounds, duration=duration,
+ lossrate=lossrate, traffic=self._verification_params)
+ verification_iterations += 1
+ else:
+ self._logger.error('Could not pass Trex Verification. Test failed')
+ return self.calculate_results(stats_ok)
+
+ def start_rfc2544_throughput(self, traffic=None, tests=1, duration=60,
+ lossrate=0.0):
+ raise NotImplementedError(
+ 'Trex start rfc2544 throughput not implemented')
+
+ def wait_rfc2544_throughput(self):
+ raise NotImplementedError(
+ 'Trex wait rfc2544 throughput not implemented')
+
+ def send_burst_traffic(self, traffic=None, duration=20):
+ """See ITrafficGenerator for description
+ """
+ self._logger.info("In Trex send_burst_traffic method")
+ self._params.clear()
+
+ self._params['traffic'] = self.traffic_defaults.copy()
+ if traffic:
+ self._params['traffic'] = merge_spec(
+ self._params['traffic'], traffic)
+
+ if settings.getValue('TRAFFICGEN_TREX_LEARNING_MODE'):
+ self.learning_packets(traffic)
+ self._logger.info("T-Rex sending traffic")
+ stats = self.generate_traffic(traffic, duration)
+
+ time.sleep(3) # allow packets to complete before reading stats
+
+ return self.calculate_results(stats)
+
+ def send_rfc2544_back2back(self, traffic=None, tests=1, duration=30,
+ lossrate=0.0):
+ raise NotImplementedError(
+ 'Trex send rfc2544 back2back not implemented')
+
+ def start_rfc2544_back2back(self, traffic=None, tests=1, duration=30,
+ lossrate=0.0):
+ raise NotImplementedError(
+ 'Trex start rfc2544 back2back not implemented')
+
+ def wait_rfc2544_back2back(self):
+ raise NotImplementedError(
+ 'Trex wait rfc2544 back2back not implemented')
+
+if __name__ == "__main__":
+ pass