Trex_2544_verification: Add verification functionality to Trex code

- Adds T-Rex verification step as implemented by other trafficgens
- Adds check in rfc2544 loop for if no packets are received to fail test
  immediately
- Refactors the trial code to support the verification option
- Adds trial_run function
- Removed unused line speed configuration setting

JIRA: VSPERF-553

Change-Id: Ie324fe8fb6bf79fe0dc337b91af2bf83e901a8ab
Signed-off-by: Christian Trautman <ctrautma@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/docs/testing/user/configguide/trafficgen.rst b/docs/testing/user/configguide/trafficgen.rst
index 535f7995..91c4084e 100644
--- a/docs/testing/user/configguide/trafficgen.rst
+++ b/docs/testing/user/configguide/trafficgen.rst
@@ -849,3 +849,23 @@ modified. Enable Promiscuous mode when doing multistream at layer 2 testing with
 .. code-block:: console
 
     TRAFFICGEN_TREX_PROMISCUOUS=True
+
+RFC2544 Validation
+~~~~~~~~~~~~~~~~~~
+
+T-Rex can perform a verification run for a longer duration once the binary search of the
+RFC2544 trials have completed. This duration should be at least 60 seconds. This is similar
+to other traffic generator functionality where a more sustained time can be attempted to
+verify longer runs from the result of the search. This can be configured with the following
+params
+
+.. code-block:: console
+
+    TRAFFICGEN_TREX_VERIFICATION_MODE = False
+    TRAFFICGEN_TREX_VERIFICATION_DURATION = 60
+    TRAFFICGEN_TREX_MAXIMUM_VERIFICATION_TRIALS = 10
+
+The duration and maximum number of attempted verification trials can be set to change the
+behavior of this step. If the verification step fails, it will resume the binary search
+with new values where the maximum output will be the last attempted frame rate minus the
+current set thresh hold.