[dts] [PATCH] revise checksum offload test plan

[xuyanjie]

Signed-off-by: xuyanjie <yanjie.xu at intel.com>

diff --git a/test_plans/checksum_offload_test_plan.rst b/test_plans/checksum_offload_test_plan.rst
index 82fd12f..408052e 100644
--- a/test_plans/checksum_offload_test_plan.rst
+++ b/test_plans/checksum_offload_test_plan.rst
@@ -219,3 +219,27 @@ Configure the traffic generator to send the multiple packets with the following
 combination: good/bad ip checksum + good/bad udp/tcp checksum.
 
 Check the Rx checksum flags consistent with expected flags.
+
+Test Case: Validate checksum offload performance
+=================================================================
+At least 2 ports should be binded
+
+packet_sizes = [64, 128, 256, 512, 1024]
+
+Setup the ``csum`` forwarding mode::
+
+  testpmd> set fwd csum
+  Set csum packet forwarding mode
+
+Start the packet forwarding::
+
+  testpmd> start
+    csum packet forwarding - CRC stripping disabled - packets/burst=32
+    nb forwarding cores=1 - nb forwarding ports=10
+    RX queues=1 - RX desc=128 - RX free threshold=64
+    RX threshold registers: pthresh=8 hthresh=8 wthresh=4
+    TX queues=1 - TX desc=512 - TX free threshold=0
+    TX threshold registers: pthresh=32 hthresh=8 wthresh=8
+
+Configure the traffic generator ixia to send traffic and verify throughput
+
-- 
2.7.4