STL traffic: Use the sleep+stop logic

+ PPS limit for AWS set to 1.2 Mpps.
+ The logic is very similar to that one in ASTF driver.
 + This helps for testbeds with high duration stretching (e.g. AWS).
 + Difference: No transaction scale, and we deal with floats.
+ Update loss counting to count unsent packets as lost.
 + Also count "unsent" transactions for other transaction types.
 + If nonzero, log the number of unsent packets/transactions.
+ Make STL and ASTF time overhead constant (called delay) configurable.
+ Subtract delay from approximated_duration, also for ASTF.

Change-Id: I6ee6aa6fba4f110ba1636e1b0ff76cac64383e33
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/resources/libraries/python/Constants.py b/resources/libraries/python/Constants.py
index 8937e6cfc0..14fb7958b8 100644
--- a/resources/libraries/python/Constants.py
+++ b/resources/libraries/python/Constants.py
@@ -234,7 +234,7 @@ class Constants:
     # Number of trials to execute in MRR test.
     PERF_TRIAL_MULTIPLICITY = get_int_from_env(u"PERF_TRIAL_MULTIPLICITY", 10)
 
-    # Duration of one trial in MRR test.
+    # Duration [s] of one trial in MRR test.
     PERF_TRIAL_DURATION = get_float_from_env(u"PERF_TRIAL_DURATION", 1.0)
 
     # Whether to use latency streams in main search trials.
@@ -244,6 +244,16 @@ class Constants:
     PERF_TRIAL_LATENCY_DURATION = get_float_from_env(
         u"PERF_TRIAL_LATENCY_DURATION", 5.0)
 
+    # For some testbeds TG takes longer than usual to start sending traffic.
+    # This constant [s] allows longer wait, without affecting
+    # the approximate duration. For example, use 0.098 for AWS.
+    PERF_TRIAL_STL_DELAY = get_float_from_env(u"PERF_TRIAL_STL_DELAY", 0.0)
+
+    # ASTF usually needs a different value for the delay.
+    PERF_TRIAL_ASTF_DELAY = get_float_from_env(
+        u"PERF_TRIAL_ASTF_DELAY", 0.112
+    )
+
     # Extended debug (incl. vpp packet trace, linux perf stat, ...).
     # Full list is available as suite variable (__init__.robot) or is
     # override by test.
@@ -300,7 +310,7 @@ class Constants:
         # Vxlan traffic will still show stretching at 36 Mpps (>12%),
         # but we do not care about those tests that much.
         u"Mellanox-CX556A": 36000000, # 148809523,
-        u"Amazon-Nitro-50G": 1500000,
+        u"Amazon-Nitro-50G": 1200000,
         u"virtual": 14880952,
     }