Re: bhyve VM not getting as much upload bandwidth as the host

Hi Washington

From my experience, you have to turn off TSO LRO TXCSUM etc for the host
interface which is bridge to VM.
for example, my rc.conf relateted line is

ifconfig_ix1="up -tso -lro -txcsum -rxcsum"

best regards.


2023年8月14日(月) 1:04 Odhiambo Washington <odhiambo@gmail.com>:

> Hello all,
>
> I am still new to virtualization (using bhyve) and wanted to see if I can
> get some help towards making headway with certain aspects.
>
> I am running a Debian12 VM under bhyve and I am wondering why it doesn't
> get as much upload bandwidth as the main host when I run speedtest:
>
> From inside the VM:
>
> wash@debian12$ speedtest-cli
> Retrieving speedtest.net configuration...
> Testing from XXXXXX (x.x.x.x)...
> Retrieving speedtest.net server list...
> Selecting best server based on ping...
> Hosted by Zuku (Nairobi) [0.16 km]: 6.798 ms
> Testing download
> speed................................................................................
> Download: 48.31 Mbit/s
> Testing upload
> speed......................................................................................................
> Upload: 0.42 Mbit/s
>
> From the Host:
> [16:03 ~ ]$ speedtest-cli
> Retrieving speedtest.net configuration...
> Testing from XXXXXXXX (x.x.x.x)...
> Retrieving speedtest.net server list...
> Selecting best server based on ping...
> Hosted by Zuku (Nairobi) [0.16 km]: 2.493 ms
> Testing download
> speed................................................................................
> Download: 47.91 Mbit/s
> Testing upload
> speed......................................................................................................
> Upload: 48.38 Mbit/s
>
>
>
> --
> Best regards,
> Odhiambo WASHINGTON,
> Nairobi,KE
> +254 7 3200 0004/+254 7 2274 3223
> "Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-)
> [How to ask smart questions:
> http://www.catb.org/~esr/faqs/smart-questions.html]
>