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CblP
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CHR NAT performance on desktop HW?

Wed Mar 01, 2017 12:07 am

I've recently got 1Gbit ethernet uplink, and I only get around 300mbit of NAT through CHR in a virtualbox. Is this expected or something is off here? Does anybody have better experience with ESXi on i3 level CPU? just in case: win7 host, virtio, KVM, intel I350 card. routing speed (no NAT) was around 3Gbps on a dumb loopback interface so it's not like I'm hitting some CHR limitation wall, it is just NAT performance in this setup. host itself can do 930-950 mbit on speedtest, though there is no NAT involved in this scenario.
Any insights into your real world NAT performance with CHR will be appreciated.
 
CblP
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Re: CHR NAT performance on desktop HW?

Fri Mar 03, 2017 1:18 pm

anybody with similar or (hopefully) different experience with CHR NAT throughput?
 
kujo
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Re: CHR NAT performance on desktop HW?

Fri Mar 17, 2017 2:33 pm

anybody with similar or (hopefully) different experience with CHR NAT throughput?
Can you update to latest RC? There are some trouble with interface queues!
 
CblP
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Re: CHR NAT performance on desktop HW?

Sat Aug 05, 2017 2:55 am

just FYI, I had some free time to install ESXi today. No tinkering just default settings.
and.... the same CHR is able to saturate the link doing NAT on the same CPU (G1840). It does 930 up/down with 20-30% CPU load (single CPU given to it).
So, in terms of NAT performance, something is different in what ESXi does, compared to VirtualBox, and the throughput is much better.
I'd recommend moving from VirtualBox if you need >100mbit speeds.
 
CblP
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Re: CHR NAT performance on desktop HW?

Sat Aug 05, 2017 2:59 am

also, the same dumb bandwidth test to 127.0.0.1 floats around 10Gbps, a nice bump from 3Gbps I saw on Virtualbox. So, roughly, that is like 3+ times better performance.
This actually lines up pretty well with 250-300 mbps of NAT that I had on Virtualbox.
 
Kindis
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Re: CHR NAT performance on desktop HW?

Sat Aug 05, 2017 10:14 am

Virtualbox ontop of Windows is not a hypervisor which is needed to gain good performance. If you have Windows 7 you don't have access Hyper-V. If you could run Windows 10 pro instead then you can run Hyper-V and have a hypervisor and Windows at the same time.

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