Re: slow network performance in bhyve with freebsd guests compared with any other guest os
Lexi Winter <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.net |
|---|---|
| Message-ID | <[email protected]> |
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: 1023!ragweed ~% iperf3-darwin -c iris.eden.le-fay.org Connecting to host iris.eden.le-fay.org, port 5201 [ 18] local 2001:8b0:aab5:c110:ab:f106:1d40:4841 port 57426 connected to fd12:8247:3:1::7 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd RTT [ 18] 0.00-1.00 sec 953 MBytes 7.99 Gbits/sec 0 4.00 MBytes 1ms [ 18] 1.00-2.00 sec 1.15 GBytes 9.87 Gbits/sec 0 4.00 MBytes 1ms [ 18] 2.00-3.00 sec 1.15 GBytes 9.87 Gbits/sec 0 4.00 MBytes 2ms [ 18] 3.00-4.00 sec 1.15 GBytes 9.87 Gbits/sec 0 4.00 MBytes 2ms [ 18] 4.00-5.00 sec 1.13 GBytes 9.67 Gbits/sec 0 4.00 MBytes 1ms [ 18] 5.00-6.00 sec 1.15 GBytes 9.87 Gbits/sec 0 4.00 MBytes 2ms [ 18] 6.00-7.00 sec 1.14 GBytes 9.82 Gbits/sec 0 4.00 MBytes 1ms [ 18] 7.00-8.00 sec 1.15 GBytes 9.87 Gbits/sec 0 4.00 MBytes 1ms [ 18] 8.00-9.00 sec 1.15 GBytes 9.85 Gbits/sec 46 3.35 MBytes 1ms [ 18] 9.00-10.00 sec 1.15 GBytes 9.87 Gbits/sec 0 3.44 MBytes 1ms - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 18] 0.00-10.00 sec 11.2 GBytes 9.66 Gbits/sec 46 sender [ 18] 0.00-10.00 sec 11.2 GBytes 9.65 Gbits/sec receiver iperf Done. 1023!ragweed ~% client is macOS, server is FreeBSD 15.0 bhyve guest, VM host is FreeBSD 15.0 on Ryzen 7 2700X with ix(4) network card, path MTU is 9000. as you can see, it reached close enough to wire speed. i tested with 1500 MTU and it managed ~4Gbps, which is not great, but around what i'd expect (and a lot faster than your test manages). i am not using tcp_rack or any other TCP stack non-default options. regards, liss.