1 files changed, 39 insertions, 0 deletions
diff --git a/scripts/stl/flow_stats_latency.py b/scripts/stl/flow_stats_latency.py
new file mode 100644
index 00000000..e053549e
--- /dev/null
+++ b/scripts/stl/flow_stats_latency.py
@@ -0,0 +1,39 @@
+from trex_stl_lib.api import *
+
+class STLS1(object):
+    """
+    Create flow stat latency stream of UDP packet.
+    Can specify using tunables the packet length (fsize) and packet group id (pg_id)
+    Since we can't have two latency streams with same pg_id, in order to be able to start this profile
+    on more than one port, we add port_id to the pg_id
+    Notice that for perfomance reasons, latency streams are not affected by -m flag, so
+    you can only change the pps value by editing the code.
+    """
+
+    def __init__ (self):
+        self.fsize = 64
+        self.pg_id = 0
+
+    def _create_stream (self):
+        size = self.fsize - 4; # HW will add 4 bytes ethernet FCS
+        base_pkt = Ether() / IP(src = "16.0.0.1", dst = "48.0.0.1") / UDP(dport = 12, sport = 1025)
+        pad = max(0, size - len(base_pkt)) * 'x'
+        pkt = STLPktBuilder(pkt = base_pkt/pad)
+
+        return [STLStream(packet = pkt,
+                          mode = STLTXCont(pps=1000),
+                          flow_stats = STLFlowLatencyStats(pg_id = self.pg_id))
+               ]
+
+    def get_streams (self, fsize = 64, pg_id = 7, **kwargs):
+        self.fsize = fsize
+        self.pg_id = pg_id + kwargs['port_id']
+        return self._create_stream()
+
+
+# dynamic load - used for trex console or simulator
+def register():
+    return STLS1()
+
+
+