X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=docs%2Freport%2Fvpp_performance_tests%2Fpacket_latency%2Findex.rst;h=c079fd11b4c710ae6517b78fc633aa2c323f43e2;hp=86b08e2b28ee75a141fec08a4430608402f3fe3a;hb=25ccc0995192637934da320bc28b788382733fa1;hpb=c3abfc9d604770a10a658d1a7f780c3761fe15f4

diff --git a/docs/report/vpp_performance_tests/packet_latency/index.rst b/docs/report/vpp_performance_tests/packet_latency/index.rst
index 86b08e2b28..c079fd11b4 100644
--- a/docs/report/vpp_performance_tests/packet_latency/index.rst
+++ b/docs/report/vpp_performance_tests/packet_latency/index.rst
@@ -4,11 +4,34 @@
 
 .. _VPP_HDRH_Packet_Latency:
 
-HDRHistogram Packet Latency
-===========================
+Packet Latency
+==============
 
-.. todo::
-    Introduction
+VPP latency results are generated based on the test data obtained from
+|csit-release| NDR-PDR throughput tests executed across physical
+testbeds hosted in LF FD.io labs: 3n-hsw, 3n-skx, 2n- skx, 2n-clx,
+3n-dnv, 2n-dnv, 3n-tsh, 2n-tx2.
+
+Latency by percentile distribution plots are used to show packet latency
+percentiles at different packet rate load levels: i) No-Load latency
+streams only, ii) Low-Load at 10% PDR, iii) Mid-Load at 50% PDR and iv)
+High-Load at 90% PDR.
+
+For more details, see :ref:`latency_methodology`.
+
+Additional information about graph data:
+
+#. **Graph Title**: describes tested DUT packet path.
+
+#. **X-axis Labels**: percentile of packets.
+
+#. **Y-axis Labels**: measured one-way packet latency values in [uSec].
+
+#. **Graph Legend**: list of latency tests at different packet rate load
+   level.
+
+#. **Hover Information**: packet rate load level, stream direction
+   (East-West, West-East), percentile, one-way latency.
 
 .. note::
 
@@ -16,8 +39,10 @@ HDRHistogram Packet Latency
     `FD.io test executor vpp performance job 2n-skx`_,
     `FD.io test executor vpp performance job 3n-skx`_,
     `FD.io test executor vpp performance job 2n-clx`_,
-    `FD.io test executor vpp performance job 3n-hsw`_ and
-    `FD.io test executor vpp performance job 3n-tsh`_ with RF
+    `FD.io test executor vpp performance job 2n-zn2`_,
+    `FD.io test executor vpp performance job 3n-hsw`_,
+    `FD.io test executor vpp performance job 3n-tsh`_ and
+    `FD.io test executor vpp performance job 2n-tx2`_ with RF
     result files csit-vpp-perf-|srelease|-\*.zip
     `archived here <../../_static/archive/>`_.
 
@@ -29,6 +54,7 @@ HDRHistogram Packet Latency
     ip6
     srv6
     ip4_tunnels
+    nat44
     vm_vhost
     container_memif
     ipsec