Proxmox Virtio Win drivers above 10Gb?

IamSpartacus

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Mar 14, 2016
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Is it possible to get the Virtio network drivers for Windows guests to run above 10Gb on Promxox/KVM?
 

sboesch

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Aug 3, 2012
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Boy, I am asleep at the wheel today. I read this post all wrong LOL. I also have been thinking it's Friday all damn day. Nothing ruins your Friday when you realize it's Thursday.
 
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gb00s

Active Member
Jul 25, 2018
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Nope. In my opinion Virtio sees every adapter as 10Gbit and can't provide higher throughput. You would need to passthrough hardware and install respective drivers for the hardware.
 

SamDabbers

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Apr 12, 2017
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There's nothing specifically limiting Virtio to 10Gbit except the speed of memory copies and efficiency of the hypervisor in processing the guest interrupts. The adapter just shows the link speed as "10Gbit" to the guest but that doesn't mean it can't possibly exceed that throughput (for example, guest-to-guest) since there's not a PHY that's operating at that particular speed.
 

IamSpartacus

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Mar 14, 2016
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There's nothing specifically limiting Virtio to 10Gbit except the speed of memory copies and efficiency of the hypervisor in processing the guest interrupts. The adapter just shows the link speed as "10Gbit" to the guest but that doesn't mean it can't possibly exceed that throughput (for example, guest-to-guest) since there's not a PHY that's operating at that particular speed.
Seems odd then that I'm capped at about 1.1-1.2GB/s between guests on the same NVMe striped zpool.

EDIT: Nvmd...just realized one of the guests is on a RAID10 zpool of 4 Intel S4600's so that 1.1GB/s is exactly as expected.
 
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