High-performance TCP/IP networking for bhyve VMs using netmap passthrough

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Hello

Project summary
=================
ptnet is a new multi-queue paravirtualized device that builds on ptnetmap
to allow VMs to exchange TCP traffic at 20 Gbps, while still offering the
same ptnetmap performance (10-100 Mpps) to native netmap applications.
The purpose of this SOC project is to write a ptnet driver for FreeBSD and
a corresponding device model for the bhyve hypervisor.


Status update for week 8
===================
In week 8 I advanced the implementation of virtio-net header support for
the ptnet driver
and tested the implementation using the QEMU hypervisor. I also added
support for optional virtio-net-header selection, interface statistics and
polling.
During next week I will finalize the driver implementation and start to
study bhyve code to adapt it to netmap.


Links:
   Project wiki page:
https://wiki.freebsd.org/SummerOfCode2016/PtnetDriverAndDeviceModel
   Code:
https://svnweb.freebsd.org/socsvn/soc2016/vincenzo/head/sys/dev/netmap/if_ptnet.c?view=markup

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