On Sun, Sep 29, 2024 at 08:12:23AM +0100, Lexi Winter wrote:
On 29/09/2024 07:58, void wrote:
Surprisingly, freebsd guest performance is about 1/3rd of the line speed.
Do some sysctls need to be tuned in freebsd specifically for when it
is in a guest context?
i tested this here and cannot reproduce the problem:
The iperf3 performance is appears to be heavily influenced by load.
The linux guest still massively outperforms the freebsd guests
The tests I posted before were when the bhyve host wasn't under much load. 0.00
to 1.00.
Right now, load is like
uptime
1:38p.m. up 4:14, 2 users, load averages: 33.66, 33.47, 33.55
and iperf3 performance for freebsd 14-p5 guest is
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-30.25 sec 143 MBytes 39.8 Mbits/sec 5 sender
[ 5] 0.00-30.25 sec 143 MBytes 39.8 Mbits/sec receiver
and performance for ubuntu guest is
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-30.04 sec 778 MBytes 217 Mbits/sec 78 sender
[ 5] 0.00-30.11 sec 776 MBytes 216 Mbits/sec receiver
I think it might be due to mabe interrupts, epoll (which i think is a linux
thing), maybe queueing. But I dont know how to fix it.
Testing from the bhyve host (so no bhyve involvement) is line speed regardless
of load. Maybe it's the way bhyve handles interrupts?
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