Re: Slow 'real world' network performance

[Peter Miller <feurry%gmail.com@localhost>]

Thanks Marcin,

I applied your settings wholesale on my test server.

With your settings
10 MB/s and 7.9 MB/s

Default settings
17.6 MB/s and 18.2 MB/s

So, unfortunately the whole package is not helping. I did not test
settings individually though.

On Fri, Oct 24, 2025 at 1:56 PM Marcin Gondek <drixter%e-utp.net@localhost> wrote:
>
> Hi Peter,
>
> I've using my below settings:
> https://fido.e-utp.net/2025/01/22/NETBSD-SYSCTL.html
>
> Some of them you already used, I've compiled it from many places, they help me to speed-up NetBSD.
>
> Thanks,
>
> --
> Marcin Gondek / Drixter
> http://fido.e-utp.net/
> AS56662
>
> -----Original Message-----
> From: netbsd-users-owner%NetBSD.org@localhost <netbsd-users-owner%NetBSD.org@localhost> On Behalf Of Peter Miller
> Sent: Friday, October 24, 2025 8:41 PM
> To: NetBSD Users <netbsd-users%netbsd.org@localhost>
> Subject: Slow 'real world' network performance
>
> When I test my VPS server (virtualized server) with iperf3 or speedtest-cli, I get 700 Mbit/s. (it varies of course depending on network congestion) If I run a test server like this
>
> python3.12 -m http.server -b $my_ip
>
> and then download 100MB and 1000MB test files, I only get 80 Mbit/s. I have seen as bad as 4 Mbit/s, when seconds later I can test 400 Mbit/s on iperf3.
>
> These aren't one off results. I have 3 virtual servers with different hosts and locations, and the performance gap is similar on all of them. With Linux, FreeBSD and OpenBSD I get download speeds inline with iperf3 test results.
>
> Last night I did my python server test on the same server, downloading the 1000 MB file to my FreeBSD laptop and got:
> NetBSD 160 Mbit/s
> FreeBSD 640 Mbit/s
> OpenBSD 528 Mbit/s (it got to 640 Mbit/s but averaged 528) I didn't test Linux (Debian) last night, but it's usually similar to FreeBSD
>
> Does anyone have suggestions on where to look next or some settings that might help. I have tried the TCP settings suggested here https://wiki.netbsd.org/tutorials/tuning_netbsd_for_performance/
> but this post looks out of date, and it didn't increase performance.
>
> --
> Thanks
> Peter



-- 
Thanks
Peter