virtio for 9.1-R

[Bryan Venteicher]

Hi,

<trim>

> 
> What's the actual reallife performance benefits from virtio?
>  Twofold,
> threefold, more, less?
> 

A magnitude or more. I can push 6-7Gbs through vtnet vs. <400Mbs with
the emulated e1000. The best advice of course is just to try it out
in your environment. It may not matter depending on your needs.

IIRC, I could get Linux VirtIO to do 8-9Gbs in the same setup. I hope
to close that gap with my upcoming work.

Bryan

> Linux-KVM web-site, http://www.linux-kvm.org/page/Virtio, mentions
> that they can push 1Gbps or so through the virtio network driver, but
> the number seems meaningless, since no context is established of the
> KVM performance prior to virtio.
> 
> Another official-looking page, http://wiki.libvirt.org/page/Virtio,
> fails to make any number-based sales pitch whatsoever, whereas
> http://www.linux-kvm.org/page/Using_VirtIO_NIC likewise attempts to
> show up some random meaningless numbers, still failing to establish
> the context of what the performance is like without virtio.
> 
> C.
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to
> "freebsd-stable-unsubscribe at freebsd.org"
>