app/testpmd: add tx_first burst number option

[dpdk.git] / doc / guides / testpmd_app_ug / testpmd_funcs.rst

diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index d81298997165c0a658bb53ec7dc579da4784d9b4..4e192294fc4ec84fb683318210299564ecb835bf 100644 (file)
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -98,9 +98,11 @@ Start packet forwarding with current configuration::
 start tx_first
 ~~~~~~~~~~~~~~
 
-Start packet forwarding with current configuration after sending one burst of packets::
+Start packet forwarding with current configuration after sending specified number of bursts of packets::
 
-   testpmd> start tx_first
+   testpmd> start tx_first (""|burst_num)
+
+The default burst number is 1 when ``burst_num`` not presented.
 
 stop
 ~~~~