Hi, Filip I believe that the --max-pkt-len=9600 has an effect of setting the DEV_RX_OFFLOAD_JUMBO_FRAME flag, and not setting the mbuf seg size. If you want to set the mbuf segment size, you need to use the "--mbuf-size" testpmd parameter. For example, add "--mbuf-size=10000" and then try "set txpkts 9036" from the testpmd cli
Regards, Rami Rosen On Tue, 26 Feb 2019 at 08:49, Filip Janiszewski <[email protected]> wrote: > > Hi, > > Can someone suggest the proper configuration required to test jumbo > frames along with scatter mode using testpmd? > > I'm running the tool as follow: > > . > sudo ./testpmd -l 0-3 -n 4 -- -i --max-pkt-len=9600 --enable-scatter > --txd=512 --rxd=512 --forward-mode=flowgen > . > > then attempting to set the packet length: > > . > testpmd> set txpkts 9036 > length[0]=9036 > mbuf_data_size=2176 - give up > . > > According to the documentation > (https://doc.dpdk.org/guides/testpmd_app_ug/run_app.html), the option > txpkts should configure: > > . > Set TX segment sizes or total packet length. Valid for tx-only and > flowgen forwarding modes. > . > > So I was expecting to be able to set the packet length in this way, but > somehow it doesn't work and when I hit start the packets have always a > length of 60 bytes: > > . > src=00:01:02:03:04:00 - dst=00:01:02:03:04:01 - type=0x0800 - length=60 > - nb_segs=1 - hw ptype: L2_ETHER L3_IPV4_EXT_UNKNOWN L4_UDP - sw ptype: > L2_ETHER L3_IPV4 L4_UDP - l2_len=14 - l3_len=20 - l4_len=8 - Send queue=0x0 > . > > I've attempted to set the queue capabilities (scatter and JF) by hand with: > > . > testpmd> port config 1 rx_offload scatter on > testpmd> port config 1 rx_offload jumbo_frame on > . > > (repeated for both port) but this doesn't helped, so, how do I test a > card using testpmd with packets bigger than 2176? > > Thanks > > -- > BR, Filip > +48 666 369 823
