From: Maciej Czekaj <maciej.cze...@caviumnetworks.com>

        "flowgen" forwarding mode has fixed packet size (300).
        Let it re-use --txpkts option for specifying generated packet size.

Signed-off-by: Maciej Czekaj <maciej.czekaj at caviumnetworks.com>
---
 app/test-pmd/config.c                       | 2 +-
 app/test-pmd/flowgen.c                      | 3 +--
 app/test-pmd/parameters.c                   | 3 ++-
 doc/guides/testpmd_app_ug/run_app.rst       | 3 ++-
 doc/guides/testpmd_app_ug/testpmd_funcs.rst | 2 +-
 5 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index bfcbff9..db682bd 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -954,7 +954,7 @@ rxtx_config_display(void)
               rx_mode.hw_strip_crc ? "enabled" : "disabled",
               nb_pkt_per_burst);

-       if (cur_fwd_eng == &tx_only_engine)
+       if (cur_fwd_eng == &tx_only_engine || cur_fwd_eng == &flow_gen_engine)
                printf("  packet len=%u - nb packet segments=%d\n",
                                (unsigned)tx_pkt_length, (int) tx_pkt_nb_segs);

diff --git a/app/test-pmd/flowgen.c b/app/test-pmd/flowgen.c
index a6abe91..e6b1ea2 100644
--- a/app/test-pmd/flowgen.c
+++ b/app/test-pmd/flowgen.c
@@ -74,7 +74,6 @@

 /* hardcoded configuration (for now) */
 static unsigned cfg_n_flows    = 1024;
-static unsigned cfg_pkt_size   = 300;
 static uint32_t cfg_ip_src     = IPv4(10, 254, 0, 0);
 static uint32_t cfg_ip_dst     = IPv4(10, 253, 0, 0);
 static uint16_t cfg_udp_src    = 1000;
@@ -118,7 +117,7 @@ ip_sum(const unaligned_uint16_t *hdr, int hdr_len)
 static void
 pkt_burst_flow_gen(struct fwd_stream *fs)
 {
-       unsigned pkt_size = cfg_pkt_size - 4;   /* Adjust FCS */
+       unsigned pkt_size = tx_pkt_length - 4;  /* Adjust FCS */
        struct rte_mbuf  *pkts_burst[MAX_PKT_BURST];
        struct rte_mempool *mbp;
        struct rte_mbuf  *pkt;
diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index 8792c2c..c498b4b 100644
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -191,7 +191,8 @@ usage(char* progname)
               "(0 <= mapping <= %d).\n", RTE_ETHDEV_QUEUE_STAT_CNTRS - 1);
        printf("  --no-flush-rx: Don't flush RX streams before forwarding."
               " Used mainly with PCAP drivers.\n");
-       printf("  --txpkts=X[,Y]*: set TX segment sizes.\n");
+       printf("  --txpkts=X[,Y]*: set TX segment sizes"
+               " or total packet length.\n");
        printf("  --disable-link-check: disable check on link status when "
               "starting/stopping ports.\n");
 }
diff --git a/doc/guides/testpmd_app_ug/run_app.rst 
b/doc/guides/testpmd_app_ug/run_app.rst
index 7712bd2..34bf924 100644
--- a/doc/guides/testpmd_app_ug/run_app.rst
+++ b/doc/guides/testpmd_app_ug/run_app.rst
@@ -450,7 +450,8 @@ The commandline options are:

 *   ``--txpkts=X[,Y]``

-    Set TX segment sizes.
+    Set TX segment sizes or total packet length. Valid for ``tx-only``
+    and ``flowgen`` forwarding modes.

 *   ``--disable-link-check``

diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst 
b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index f87e0c2..c1868e6 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -405,7 +405,7 @@ When retry is enabled, the transmit delay time and number 
of retries can also be
 set txpkts
 ~~~~~~~~~~

-Set the length of each segment of the TX-ONLY packets::
+Set the length of each segment of the TX-ONLY packets or length of packet for 
FLOWGEN mode::

    testpmd> set txpkts (x[,y]*)

-- 
2.7.4

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