diff options
| -rw-r--r-- | docs/testing/user/userguide/faq.rst | 46 | ||||
| -rwxr-xr-x | nfvbench/cfg.default.yaml | 15 | ||||
| -rw-r--r-- | nfvbench/nfvbench.py | 23 | ||||
| -rwxr-xr-x | nfvbench/traffic_client.py | 5 | ||||
| -rw-r--r-- | nfvbench/traffic_gen/trex_gen.py | 22 | ||||
| -rw-r--r-- | test/test_chains.py | 3 | ||||
| -rw-r--r-- | test/test_nfvbench.py | 5 |
7 files changed, 111 insertions, 8 deletions
diff --git a/docs/testing/user/userguide/faq.rst b/docs/testing/user/userguide/faq.rst index 9a1a7da..a8aad9a 100644 --- a/docs/testing/user/userguide/faq.rst +++ b/docs/testing/user/userguide/faq.rst @@ -47,3 +47,49 @@ The most common issues that prevent traffic from passing are: - if the switch port is configured as access port, you must disable vlan_tagging in the NFVbench configuration - of the switch port is configured as trunk (recommended method), you must enable it + +Issues with high performances at a high line rate +------------------------------------------------- + +Flow statistics and/or latency stream can cause performance issue when testing high line rate. + +Flow statistics implies CPU usage to analyse packets and retrieve statistics. CPU can reach 100% usage when high throughput is tested because only one CPU is used for packet reception in TRex. +The ``--no-flow-stats`` option allows you to disable TRex statistics aggregation during the NFVBench test. +This, will permit to save CPU capabilities used for packet reception. + +Example of use : + +.. code-block:: bash + + nfvbench ``--no-flow-stats`` + + 2019-10-28 10:26:52,099 INFO End-to-end connectivity established + 2019-10-28 10:26:52,127 INFO Cleared all existing streams + 2019-10-28 10:26:52,129 INFO Traffic flow statistics are disabled. + + +Latency streams implies also CPU usage to analyse packets and retrieve latency values. CPU can reach 100% usage when high throughput is tested because only one CPU is used for packet reception in TRex. +The ``--no-latency-streams`` option allows you to disable latency streams during the NFVBench test. +This, will permit to save CPU capabilities used for packet reception but no latency information will be return (to be used only if latency value has no meaning for your test). + +Example of use : + +.. code-block:: bash + + nfvbench ``--no-latency-streams`` + 2019-10-28 10:30:03,955 INFO End-to-end connectivity established + 2019-10-28 10:30:03,982 INFO Cleared all existing streams + 2019-10-28 10:30:03,982 INFO Latency streams are disabled + + +Latency flow statistics implies CPU usage to analyse packets and retrieve statistics. CPU can reach 100% usage when high throughput is tested because only one CPU is used for packet reception in TRex. +The ``--no-latency-stats`` option allows you to disable TRex statistics aggregation for latency packets during the NFVBench test. +This, will permit to save CPU capabilities used for packet reception. + +Example of use : + +.. code-block:: bash + + nfvbench ``--no-latency-stats`` + 2019-10-28 10:28:21,559 INFO Cleared all existing streams + 2019-10-28 10:28:21,567 INFO Latency flow statistics are disabled. diff --git a/nfvbench/cfg.default.yaml b/nfvbench/cfg.default.yaml index fdd5f84..551b1c4 100755 --- a/nfvbench/cfg.default.yaml +++ b/nfvbench/cfg.default.yaml @@ -755,3 +755,18 @@ no_vswitch_access: false # Can be overriden by --service-mode # Should be left to the default value (false) service_mode: false + +# Disable extra flow stats (on high load traffic) +# Can be overriden by --no-flow-stats +# Should be left to the default value (false) +no_flow_stats: false + +# Disable flow stats for latency traffic +# Can be overriden by --no-latency-stats +# Should be left to the default value (false) +no_latency_stats: false + +# Disable latency measurements (no streams) +# Can be overriden by --no-latency-stream +# Should be left to the default value (false) +no_latency_streams: false diff --git a/nfvbench/nfvbench.py b/nfvbench/nfvbench.py index 80b9a93..18a7d2b 100644 --- a/nfvbench/nfvbench.py +++ b/nfvbench/nfvbench.py @@ -444,6 +444,21 @@ def _parse_opts_from_cli(): default=False, help='Enable T-Rex service mode for debugging only') + parser.add_argument('--no-flow-stats', dest='no_flow_stats', + action='store_true', + default=False, + help='Disable extra flow stats (on high load traffic)') + + parser.add_argument('--no-latency-stats', dest='no_latency_stats', + action='store_true', + default=False, + help='Disable flow stats for latency traffic') + + parser.add_argument('--no-latency-streams', dest='no_latency_streams', + action='store_true', + default=False, + help='Disable latency measurements (no streams)') + opts, unknown_opts = parser.parse_known_args() return opts, unknown_opts @@ -583,6 +598,14 @@ def main(): config.vxlan = True if opts.restart: config.restart = True + if opts.service_mode: + config.service_mode = True + if opts.no_flow_stats: + config.no_flow_stats = True + if opts.no_latency_stats: + config.no_latency_stats = True + if opts.no_latency_streams: + config.no_latency_streams = True # port to port loopback (direct or through switch) if opts.l2_loopback: config.l2_loopback = True diff --git a/nfvbench/traffic_client.py b/nfvbench/traffic_client.py index 7591062..6d870f6 100755 --- a/nfvbench/traffic_client.py +++ b/nfvbench/traffic_client.py @@ -679,7 +679,10 @@ class TrafficClient(object): self.run_config['rates'][idx] = {'rate_pps': self.__convert_rates(rate)['rate_pps']} self.gen.clear_streamblock() - self.gen.create_traffic(frame_size, self.run_config['rates'], bidirectional, latency=True) + if self.config.no_latency_streams: + LOG.info("Latency streams are disabled") + self.gen.create_traffic(frame_size, self.run_config['rates'], bidirectional, + latency=not self.config.no_latency_streams) def _modify_load(self, load): self.current_total_rate = {'rate_percent': str(load)} diff --git a/nfvbench/traffic_gen/trex_gen.py b/nfvbench/traffic_gen/trex_gen.py index b8e32e3..53786f7 100644 --- a/nfvbench/traffic_gen/trex_gen.py +++ b/nfvbench/traffic_gen/trex_gen.py @@ -438,6 +438,8 @@ class TRex(AbstractTrafficGenerator): """ streams = [] pg_id, lat_pg_id = self.get_pg_id(port, chain_id) + if self.config.no_flow_stats: + LOG.info("Traffic flow statistics are disabled.") if l2frame == 'IMIX': for ratio, l2_frame_size in zip(IMIX_RATIOS, IMIX_L2_SIZES): pkt = self._create_pkt(stream_cfg, l2_frame_size) @@ -448,11 +450,13 @@ class TRex(AbstractTrafficGenerator): if stream_cfg['vxlan'] is True: streams.append(STLStream(packet=pkt, flow_stats=STLFlowStats(pg_id=pg_id, - vxlan=True), + vxlan=True) + if not self.config.no_flow_stats else None, mode=STLTXCont(pps=ratio))) else: streams.append(STLStream(packet=pkt, - flow_stats=STLFlowStats(pg_id=pg_id), + flow_stats=STLFlowStats(pg_id=pg_id) + if not self.config.no_flow_stats else None, mode=STLTXCont(pps=ratio))) if latency: @@ -469,11 +473,13 @@ class TRex(AbstractTrafficGenerator): if stream_cfg['vxlan'] is True: streams.append(STLStream(packet=pkt, flow_stats=STLFlowStats(pg_id=pg_id, - vxlan=True), + vxlan=True) + if not self.config.no_flow_stats else None, mode=STLTXCont())) else: streams.append(STLStream(packet=pkt, - flow_stats=STLFlowStats(pg_id=pg_id), + flow_stats=STLFlowStats(pg_id=pg_id) + if not self.config.no_flow_stats else None, mode=STLTXCont())) # for the latency stream, the minimum payload is 16 bytes even in case of vlan tagging # without vlan, the min l2 frame size is 64 @@ -483,14 +489,18 @@ class TRex(AbstractTrafficGenerator): pkt = self._create_pkt(stream_cfg, 68) if latency: + if self.config.no_latency_stats: + LOG.info("Latency flow statistics are disabled.") if stream_cfg['vxlan'] is True: streams.append(STLStream(packet=pkt, flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id, - vxlan=True), + vxlan=True) + if not self.config.no_latency_stats else None, mode=STLTXCont(pps=self.LATENCY_PPS))) else: streams.append(STLStream(packet=pkt, - flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id), + flow_stats=STLFlowLatencyStats(pg_id=lat_pg_id) + if not self.config.no_latency_stats else None, mode=STLTXCont(pps=self.LATENCY_PPS))) return streams diff --git a/test/test_chains.py b/test/test_chains.py index 5fd1ce6..741bee7 100644 --- a/test/test_chains.py +++ b/test/test_chains.py @@ -70,6 +70,9 @@ def _get_chain_config(sc=ChainType.PVP, scc=1, shared_net=True, rate='1Mpps'): config.duration_sec = 2 config.interval_sec = 1 config.openrc_file = "dummy.rc" + config.no_flow_stats = False + config.no_latency_stats = False + config.no_latency_streams = False return config def test_chain_runner_ext_no_openstack(): diff --git a/test/test_nfvbench.py b/test/test_nfvbench.py index 04e3191..7a0a9ed 100644 --- a/test/test_nfvbench.py +++ b/test/test_nfvbench.py @@ -332,7 +332,10 @@ def _get_dummy_tg_config(chain_type, rate, scc=1, fc=10, step_ip='0.0.0.1', 'mbuf_factor': None, 'disable_hdrh': None, 'mbuf_64': None, - 'service_mode': False + 'service_mode': False, + 'no_flow_stats': False, + 'no_latency_stats': False, + 'no_latency_streams': False }) |