[dpdk-users] Usage of example vhost (vhost-switch)

[Derek]

Hi,  Madhukar

The io forwarding mode is set.
One question is
when using pktgen generates packets to the host, in addition to the vlan id
and mac, does it need to set the IP of source NIC and dst NIC?

Thanks,
Derek

madhukar mythri <madhukar.mythri at gmail.com> 於 2019年9月18日 週三 下午5:00寫道：

> Did you configured the testpmd with "io" forwarding mode?
> you can cross-check with this command: "show config rxtx".
> For more information, you can go-through this testpmd documentation under
> "4.4.7" section:
> https://doc.dpdk.org/guides/testpmd_app_ug/testpmd_funcs.html
>
> ~~ Madhukar.
>
> On Wed, Sep 18, 2019 at 9:39 AM Derek <jwsu1986 at gmail.com> wrote:
>
>> Hi,
>>
>> I try to run the vhost example in DPDK.
>>
>> The steps I did are:
>>
>> (1) The guest vm created by QEMU using the shell script
>> #!/bin/bash
>>
>> USER_SOCK="/tmp/sock0"
>> MPATH="/dev/hugepages"
>> MEMSZ=2048
>> IMG=/home/derek/ubuntu-guest.img
>>
>> qemu-system-x86_64 \
>> -boot c \
>> -machine accel=kvm -cpu host \
>> -m ${MEMSZ} -object
>>
>> memory-backend-file,id=hugemem,size=${MEMSZ}M,mem-path=/dev/hugepages,share=on
>> \
>> -mem-prealloc -smp 2 -numa node,memdev=hugemem \
>> -chardev socket,id=char1,path=/tmp/sock0,server \
>> -netdev type=vhost-user,id=hostnet1,chardev=char1  \
>> -device virtio-net-pci,netdev=hostnet1,id=net1,mac=52:54:00:00:00:14 \
>> -drive format=raw,file=${IMG} -vnc :4,password -monitor stdio
>>
>> (2) run the vhost-switch on the host
>> #> ./build/vhost-switch -l 0-3 -n 4--2 uge-dir /dev/hugepages --socket-mem
>> 1024 --log-level 8 -w 00000:73:00.1 -- --socket-file /tmp/sock0 --client
>> -p
>> 0x1 --stats 20
>>
>> (3) The guest vm is started successfully. Then, in the guest vm i did
>> #> ./x86_64-native-gcc/app/testpmd -l 0-1 -- -i
>> > start tx_first
>>
>> I can see the TX packets on the host's vhost-switch  stats and got the
>> message
>> VHOST_DATA: (0) mac 52:54:00:00:00:14 and vlan 1000 registered
>>
>> Device statistics =================================
>> Statistics for device 0
>> -----------------------
>> TX total:              32
>> TX dropped:            0
>> TX successful:         32
>> RX total:              0
>> RX dropped:            0
>> RX successful:         0
>> ===================================================
>>
>>
>> My question is that how can I inject packets to the MAC address and VLAN
>> ID
>> 1000.
>> I've tried to setup a pktgen on another host whose physical NIC is
>> directly
>> connected to the physical NIC port of the host. Then, set pktgen's dst mac
>> to 52:54:00:00:00:14 and vlan id to 1000. But the "Device statistics" is
>> not changed.
>>
>> Any idea for this problem? Very thanks.
>>
>