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authorMartin Klozik <martinx.klozik@intel.com>2018-01-04 10:32:48 +0000
committerMartin Klozik <martinx.klozik@intel.com>2018-01-12 09:43:57 +0000
commitce8e18ddcfb84f887aa91f38133781da2f592309 (patch)
tree117e7ae47b15326efc18ec5ca87a5315ac930a9a /tools/pkt_gen
parenta2d97b05fb3b7ff62f62bcb16d36c51e3df6ca77 (diff)
trex: Add support for traffic capture
A support of traffic capture was added into T-Rex. It allows to write a functional tests, which will verify proper vSwitch functionality by inspection of packets received by T-Rex. A testcase example was added into integration testcases. JIRA: VSPERF-556 Change-Id: I5ad28479ca2ec29760b68f24510af1a6d74866ae Signed-off-by: Martin Klozik <martinx.klozik@intel.com> Reviewed-by: Al Morton <acmorton@att.com> Reviewed-by: Christian Trautman <ctrautma@redhat.com> Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com> Reviewed-by: Trevor Cooper <trevor.cooper@intel.com> Reviewed-by: Richard Elias <richardx.elias@intel.com>
Diffstat (limited to 'tools/pkt_gen')
-rw-r--r--tools/pkt_gen/trex/trex.py59
1 files changed, 49 insertions, 10 deletions
diff --git a/tools/pkt_gen/trex/trex.py b/tools/pkt_gen/trex/trex.py
index 82118f6f..5ce87b1d 100644
--- a/tools/pkt_gen/trex/trex.py
+++ b/tools/pkt_gen/trex/trex.py
@@ -20,6 +20,7 @@ import logging
import subprocess
import sys
import time
+import os
from collections import OrderedDict
# pylint: disable=unused-import
import netaddr
@@ -91,11 +92,11 @@ class Trex(ITrafficGenerator):
the configuration file
'''
self._stlclient = STLClient()
- self._logger.info("TREX: In Trex connect method...")
+ 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('TREX: Trex host not defined')
+ raise RuntimeError('T-Rex: Trex host not defined')
ping = subprocess.Popen(cmd_ping, shell=True, stderr=subprocess.PIPE)
output, error = ping.communicate()
@@ -103,7 +104,7 @@ class Trex(ITrafficGenerator):
if ping.returncode:
self._logger.error(error)
self._logger.error(output)
- raise RuntimeError('TREX: Cannot ping Trex host at ' + \
+ raise RuntimeError('T-Rex: Cannot ping Trex host at ' + \
self._trex_host_ip_addr)
connect_trex = "ssh " + self._trex_user + \
@@ -122,13 +123,13 @@ class Trex(ITrafficGenerator):
self._logger.error(error)
self._logger.error(output)
raise RuntimeError(
- 'TREX: Cannot locate Trex program at %s within %s' \
+ 'T-Rex: Cannot locate Trex program at %s within %s' \
% (self._trex_host_ip_addr, self._trex_base_dir))
self._stlclient = STLClient(username=self._trex_user, server=self._trex_host_ip_addr,
verbose_level=0)
self._stlclient.connect()
- self._logger.info("TREX: Trex host successfully found...")
+ self._logger.info("T-Rex: Trex host successfully found...")
def disconnect(self):
"""Disconnect from the traffic generator.
@@ -140,7 +141,7 @@ class Trex(ITrafficGenerator):
:returns: None
"""
- self._logger.info("TREX: In trex disconnect method")
+ self._logger.info("T-Rex: In trex disconnect method")
self._stlclient.disconnect(stop_traffic=True, release_ports=True)
@staticmethod
@@ -245,11 +246,16 @@ class Trex(ITrafficGenerator):
return (stream_1, stream_2, stream_1_lat, stream_2_lat)
- def generate_traffic(self, traffic, duration):
+ 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)
# for SR-IOV
if settings.getValue('TRAFFICGEN_TREX_PROMISCUOUS'):
@@ -264,10 +270,35 @@ class Trex(ITrafficGenerator):
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()
- self._stlclient.start(ports=[0, 1], force=True, duration=duration)
- self._stlclient.wait_on_traffic(ports=[0, 1])
+ self._stlclient.start(ports=my_ports, force=True, duration=duration)
+ 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
@@ -325,6 +356,11 @@ class Trex(ITrafficGenerator):
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):
@@ -336,7 +372,9 @@ class Trex(ITrafficGenerator):
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"))
+ 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
@@ -403,6 +441,7 @@ class Trex(ITrafficGenerator):
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)