Hi there, how does the topology looks?
This is from a 14.3 host (bhyve) with a 14.3 guest.
Host is server, 14.3 is client 14.3
Best regards.
Santiago
iperf3 -c 192.168.1.1 -t 5 -P1 -Z
Connecting to host 192.168.1.1, port 5201
[ 5] local 192.168.1.10 port 13866 connected to 192.168.1.1 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.01 sec 271 MBytes 2.25 Gbits/sec 0 739 KBytes
[ 5] 1.01-2.01 sec 250 MBytes 2.09 Gbits/sec 0 1.44 MBytes
[ 5] 2.01-3.01 sec 262 MBytes 2.21 Gbits/sec 0 1.60 MBytes
[ 5] 3.01-4.01 sec 222 MBytes 1.86 Gbits/sec 0 1.60 MBytes
[ 5] 4.01-5.01 sec 224 MBytes 1.89 Gbits/sec 0 1.60 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-5.01 sec 1.20 GBytes 2.06 Gbits/sec 0 sender
[ 5] 0.00-5.01 sec 1.20 GBytes 2.06 Gbits/sec
receiver
On 10/22/25 16:03, void wrote:
Hi,
I wondered if any work was happening to address the long-standing issue
of slow vtnet? (in my case, this leads to slow freebsd guest performance
in bhyve compared with every linux guest tested and OpenBSD).
I thought maybe the recent bridge work may have ameliorated the
problem some, but testing, after configuring a (recent) stable/15
server to use the ip-configured-on-bridge-method, showed no
improvement using
a (recent) stable/14 guest
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-60.03 sec 3.17 GBytes 454 Mbits/sec 0 sender
[ 5] 0.00-60.03 sec 3.17 GBytes 454 Mbits/sec receiver
for comparison, an ubuntu 25.04 guest:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-60.00 sec 6.42 GBytes 919 Mbits/sec 5427 sender
[ 5] 0.00-60.00 sec 6.42 GBytes 919 Mbits/sec receiver
the baremetal host
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-60.01 sec 6.58 GBytes 941 Mbits/sec 0 sender
[ 5] 0.00-60.01 sec 6.58 GBytes 941 Mbits/sec receiver
Tests done a year and a half ago on similar hardware showing
the same patterns http://void.f-m.fm.user.fm/bhyve-virtio-testing.html
