Re: VirtIO Net Tuning
- Reply: Mark Saad : "Re: VirtIO Net Tuning"
- In reply to: Mark Saad : "VirtIO Net Tuning"
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Date: Wed, 25 Mar 2026 14:54:22 UTC
> On 25. Mar 2026, at 15:06, Mark Saad <nonesuch@longcount.org> wrote: > > Hello All > I have been playing with FreeBSD 14.3-RELEASE and 15.0-REELASE amd64 qemu powered vms on a Linux cloud hosting setup. I have noticed that with VirtIO net ( vtnet ) interfaces there is some sort of tuning required , or there is some sort of limitation on the packets per second and overall throughput the nics can push. I am not able to get any one interface to push more then 6Gb/s bursts and 5.5Gb/s sustained. Before I go off the deep end with details has anyone run into this , is this a known issue ? Hi Mark, as indicated by Mike, there has been a lot of improvements to vtnet in 14.4 and 15.0 such that no special tuning is required. If you find that some tuning is necessary to improve things, I would like to know, since this is not intended. I am not saying that the vtnet driver can't be improved, only that the default settings should not need tweaking. Best regards Michael > > -- > mark saad | nonesuch@longcount.org