X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FConstants.py;fp=resources%2Flibraries%2Fpython%2FConstants.py;h=bfbbfd7471c2ea1cd50612c1039d27cb78256687;hp=6bcf5413d9d12540c678455ed0f90a6f69ee43ae;hb=1daa6fdc0bae284dee1b61f34534e59b60b7526a;hpb=cd417be7f836eb9346fad4f87bd4f75dc1d9a429

diff --git a/resources/libraries/python/Constants.py b/resources/libraries/python/Constants.py
index 6bcf5413d9..bfbbfd7471 100644
--- a/resources/libraries/python/Constants.py
+++ b/resources/libraries/python/Constants.py
@@ -269,6 +269,14 @@ class Constants:
         u"PERF_TRIAL_ASTF_DELAY", 0.112
     )
 
+    # Number of data frames in TPUT transaction, used both by TCP and UDP.
+    # The value should be 33 to keep historic continuity for UDP TPUT tests,
+    # but we are limited by TRex window of 48 KiB, so for 9000B tests
+    # it means we can send only 5 full data frames in a burst.
+    # https://github.com/cisco-system-traffic-generator/
+    # trex-core/blob/v2.88/src/44bsd/tcp_var.h#L896-L903
+    ASTF_N_DATA_FRAMES = get_int_from_env(u"ASTF_N_DATA_FRAMES", 5)
+
     # Extended debug (incl. vpp packet trace, linux perf stat, ...).
     # Full list is available as suite variable (__init__.robot) or is
     # override by test.