[dts] [PATCH] test_plan/jumboframes: fix command line
Lijuan Tu
lijuan.tu at intel.com
Thu May 7 11:43:14 CEST 2020
* fix command line
* refine description
Signed-off-by: Lijuan Tu <lijuan.tu at intel.com>
---
test_plans/jumboframes_test_plan.rst | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/test_plans/jumboframes_test_plan.rst b/test_plans/jumboframes_test_plan.rst
index 71af780..a713ee5 100644
--- a/test_plans/jumboframes_test_plan.rst
+++ b/test_plans/jumboframes_test_plan.rst
@@ -39,6 +39,11 @@ to receive Jumbo Frames with a configurable maximum packet length that is
greater than the standard maximum Ethernet frame length (1518 bytes), up to
a maximum value imposed by the hardware.
+.. note::
+
+ Maximum Packet Length = MTU(Maximum Transmission Unit) + 14(src mac + dst mac) + 4(CRC)
+ e.g., 1518 = 1500 + 14 + 4
+
Prerequisites
=============
@@ -54,13 +59,12 @@ Assuming that ports ``0`` and ``1`` of the test target are directly connected
to the traffic generator, launch the ``testpmd`` application with the following
arguments::
- ./build/app/testpmd -c ffffff -n 3 -- -i --rxd=1024 --txd=1024 \
- --burst=144 --txpt=32 --txht=0 --txfreet=0 --rxfreet=64 \
- --mbcache=200 --portmask=0x3 --mbuf-size=2048 --max-pkt-len=9600
+ ./build/app/testpmd -c ffffff -n 6 -- -i --portmask=0x3 --max-pkt-len=9600 \
+ --tx-offloads=0x00008000
The -n command is used to select the number of memory channels. It should match the number of memory channels on that setup.
-Setting the size of the mbuf data buffer to 2048 and the maximum packet length
+Setting tx-offload to 0x8000 and the maximum packet length
to 9600 (CRC included) makes input Jumbo Frames to be stored in multiple
buffers by the hardware RX engine.
--
1.8.3.1
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