From e9ff0fdf355d26d0c171c6c1137c4beb12561233 Mon Sep 17 00:00:00 2001
From: Martin Klozik <martinx.klozik@intel.com>
Date: Wed, 28 Feb 2018 06:34:23 -0800
Subject: trex: Add support for burst traffic type
Support for burst traffic type was added into T-Rex. This
traffic type is useful for tests, where a limited number
of frames should be sent through DUT.
JIRA: VSPERF-562
Change-Id: I03b7150e66a0210cce91b20c751b8624c16f951b
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: Richard Elias <richardx.elias@intel.com>
---
.../devguide/design/trafficgen_integration_guide.rst | 12 ++++++++----
.../developer/devguide/design/vswitchperf_design.rst | 12 +++++++++---
docs/testing/user/configguide/trafficgen.rst | 16 ++++++++++++++++
3 files changed, 33 insertions(+), 7 deletions(-)
(limited to 'docs/testing')
diff --git a/docs/testing/developer/devguide/design/trafficgen_integration_guide.rst b/docs/testing/developer/devguide/design/trafficgen_integration_guide.rst
index c88b80ed..0298a47f 100644
--- a/docs/testing/developer/devguide/design/trafficgen_integration_guide.rst
+++ b/docs/testing/developer/devguide/design/trafficgen_integration_guide.rst
@@ -200,12 +200,16 @@ functions:
which are discussed in detail at :ref:`integration-tests` userguide.
* param **traffic_type**: One of the supported traffic types,
- e.g. **rfc2544_throughput**, **rfc2544_continuous**
- or **rfc2544_back2back**.
- * param **frame_rate**: Defines desired percentage of frame
- rate used during continuous stream tests.
+ e.g. **rfc2544_throughput**, **rfc2544_continuous**,
+ **rfc2544_back2back** or **burst**.
* param **bidir**: Specifies if generated traffic will be full-duplex
(true) or half-duplex (false).
+ * param **frame_rate**: Defines desired percentage of frame
+ rate used during continuous stream tests.
+ * param **burst_size**: Defines a number of frames in the single burst,
+ which is sent by burst traffic type. Burst size is applied for each
+ direction, i.e. the total number of tx frames will be 2*burst_size
+ in case of bidirectional traffic.
* param **multistream**: Defines number of flows simulated by traffic
generator. Value 0 disables MultiStream feature.
* param **stream_type**: Stream Type defines ISO OSI network layer
diff --git a/docs/testing/developer/devguide/design/vswitchperf_design.rst b/docs/testing/developer/devguide/design/vswitchperf_design.rst
index 96ffcf62..9317d875 100644
--- a/docs/testing/developer/devguide/design/vswitchperf_design.rst
+++ b/docs/testing/developer/devguide/design/vswitchperf_design.rst
@@ -291,8 +291,8 @@ Detailed description of ``TRAFFIC`` dictionary items follows:
.. code-block:: console
'traffic_type' - One of the supported traffic types.
- E.g. rfc2544_throughput, rfc2544_back2back
- or rfc2544_continuous
+ E.g. rfc2544_throughput, rfc2544_back2back,
+ rfc2544_continuous or burst
Data type: str
Default value: "rfc2544_throughput".
'bidir' - Specifies if generated traffic will be full-duplex (True)
@@ -304,6 +304,12 @@ Detailed description of ``TRAFFIC`` dictionary items follows:
continuous stream tests.
Data type: int
Default value: 100.
+ 'burst_size' - Defines a number of frames in the single burst, which is sent
+ by burst traffic type. Burst size is applied for each direction,
+ i.e. the total number of tx frames will be 2*burst_size in case of
+ bidirectional traffic.
+ Data type: int
+ Default value: 100.
'multistream' - Defines number of flows simulated by traffic generator.
Value 0 disables multistream feature
Data type: int
@@ -786,7 +792,7 @@ ITrafficGenerator
connect()
disconnect()
- send_burst_traffic(traffic, numpkts, time, framerate)
+ send_burst_traffic(traffic, time)
send_cont_traffic(traffic, time, framerate)
start_cont_traffic(traffic, time, framerate)
diff --git a/docs/testing/user/configguide/trafficgen.rst b/docs/testing/user/configguide/trafficgen.rst
index 52b1b4a5..c174af0a 100644
--- a/docs/testing/user/configguide/trafficgen.rst
+++ b/docs/testing/user/configguide/trafficgen.rst
@@ -39,6 +39,7 @@ and is configured as follows:
TRAFFIC = {
'traffic_type' : 'rfc2544_throughput',
'frame_rate' : 100,
+ 'burst_size' : 100,
'bidir' : 'True', # will be passed as string in title format to tgen
'multistream' : 0,
'stream_type' : 'L4',
@@ -857,6 +858,21 @@ place. This can be adjusted with the following configurations:
TRAFFICGEN_TREX_LEARNING_MODE=True
TRAFFICGEN_TREX_LEARNING_DURATION=5
+Latency measurements have impact on T-Rex performance. Thus vswitchperf uses a separate
+latency stream for each direction with limited speed. This workaround is used for RFC2544
+**Throughput** and **Continuous** traffic types. In case of **Burst** traffic type,
+the latency statistics are measured for all frames in the burst. Collection of latency
+statistics is driven by configuration option ``TRAFFICGEN_TREX_LATENCY_PPS`` as follows:
+
+ * value ``0`` - disables latency measurements
+ * non zero integer value - enables latency measurements; In case of Throughput
+ and Continuous traffic types, it specifies a speed of latency specific stream
+ in PPS. In case of burst traffic type, it enables latency measurements for all frames.
+
+.. code-block:: console
+
+ TRAFFICGEN_TREX_LATENCY_PPS = 1000
+
SR-IOV and Multistream layer 2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
T-Rex by default only accepts packets on the receive side if the destination mac matches the
--
cgit