[dpdk-users] KNI drive without supported NICs?

["Lazarenko, Vlad (WorldQuant)" <Vlad.Lazarenko@worldquant.com>]

Gentlemen and gentleladies,

I am trying to get the KNI working on my dev box. So I've loaded the rte_kni.ko module and made sure /dev/kni has correct permissions. But when I am trying to run the KNI example, it fails with "No supported Ethernet device found" error:

$ build/kni -n 4 -c 0xf0 -- -P -p 0x3 --config="(0,4,6),(1,5,7)"
EAL: Detected 24 lcore(s)
EAL: PCI device 0000:01:00.0 on NUMA socket -1
EAL:   probe driver: 8086:10d3 net_e1000_em
EAL: Error - exiting with code: 1
  Cause: No supported Ethernet device found

My dev box does not in fact have supported NICs. But my understanding about KNI was that it allows to access Linux network stack trough the KNI kernel module, where applications create a virtual Ethernet devices (i.e. /sys/class/net/vEth*), thus there is no need for a real supported NIC or taking over the entire NIC.

On the other hand, the example application calls rte_eth_dev_count() first, which in my case returns 0, and exits.

Is my understanding about what KNI actually is wrong? Or am I missing something else?

Thanks,
Vlad



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