Looking for some help with netmap/bhyve

[Steven Crangle]

Hi,


I've recently been trying to boot up several bhyves so that I can test netmap communication between instances. The problem is, no matter what configuration I try, the guest vm running in bhyve completely hangs and becomes unusable as soon as a packet hits the netmap interface. When testing with pkt-gen, the TX side successfully starts sending packets, but the RX side will reliable freeze with the only option being killing the bhyve process.


The bhyve command used for the above test was:


    bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/dev/zvol/zroot/viper1vol    -s 3,virtio-net,tap0,mac=00:01:23:45:67:83 -s 4,virtio-net,tap4 -l com1,/dev/nmdm0A -A -H -P -m 6g viper1 &
    bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/dev/zvol/zroot/viper2vol    -s 3,virtio-net,tap1,mac=00:01:23:45:67:84 -s 4,virtio-net,tap5 -l com1,/dev/nmdm1A -A -H -P -m 6g viper2

For this test the host OS was FreeBSD-11.0-p3 and the guest OS was FreeBSD-11.0-p3.

After failing to get this solution working, I pulled down the source from the following url and installed it on the host box:

https://svnweb.freebsd.org/socsvn/soc2016/vincenzo/head/

I then ran the following commands to try and bring up the machines using the ptnetmap interface (the guest still running 11.0p3) :

    bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 1:1,virtio-blk,/dev/zvol/zroot/viper1vol    -s 2:0,virtio-net,tap0,mac=00:01:23:45:67:83 -s 2:1,ptnetmap-memdev -s 2:2,ptnet,vale0:0 -l com1,/dev/nmdm0A -A -H -P -m 6g viper1 &
    bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 1:1,virtio-blk,/dev/zvol/zroot/viper2vol    -s 2:0,virtio-net,tap1,mac=00:01:23:45:67:84 -s 2:1,ptnetmap-memdev -s 2:2,ptnet,vale0:1 -l com1,/dev/nmdm1A -A -H -P -m 6g viper2

With the above commands the vm's fail to boot with the following message:

ptnet_init: failed to get ptnetmap

Output in /var/log/messages seems to just show the ptnetmap driver allocating one RX/TX ring for each vm, while bringing the device up, the device then goes down and the above error is seen in the console.

Is there something I'm doing wrong with regards to running netmap or ptnetmap within a bhyve? Any pointers in the right direction will be much appreciated!

Kind Regards

Steven








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Steven Crangle


Systems Developer | Stream Technologies | Glasgow, UK


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