[dpdk-dev] [PKTGEN] dumb question: how to start packet TX and set the payload

[Matthew Hall]

Hello,

I was trying to just use the default PKT file, test/set_seq.pkt, like so:

sudo "./app/app/${RTE_TARGET}/pktgen" \
-l 2,3 \
--master-lcore 2 \
-n 2 \
-m 1024 \
-w 0a:00.1 \
--no-shconf \
--file-prefix pktgen \
-- \
-P \
-m 2.0 \
-f test/set_seq.pkt

After pktgen loaded, the port 0 is marked as UP. So I typed "start all" 
and also tried "str". Sadly, so far, it seems like I could not get this 
to actually begin sending any packets. At least, no counters are 
incrementing in the pktgen UI. So I wasn't sure how to make sure it is 
really sending or not.

The documentation talked about many different commands available, but it 
didn't specifically say how to start transmitting the packets based on 
the content of your *.pkt script file.

I'm just trying to figure out what I messed up so that I can write 
(another) doc patch besides the one I just sent a moment ago.

I was also curious about putting some specific payloads into the packets 
in pktgen. There are many ways of configuring the packet size, but it 
doesn't talk about how and where to set the packet content. This is 
important for my app as its performance will go up and down depending on 
if the L4-L7 data has "interesting" content inside or not.

Sincerely,
Matthew.