Hi!
It's my understanding that the Realtek network adapters are pretty
craptacular under load since they basically defer to the OS for
everything, raising an interrupt each time. Try the fourth test again
while running top and see if the interrupts (intr) spike during that
time.
On Mon, Mar 4, 2024 at 7:46 AM Pierre Peyronnel
<pierre.peyron...@gmail.com> wrote:
>
> Hey misc,
>
> Note : I posted on this topic in r/openbsd and before I open a bug, I
> thought I'd ask you.
>
> My OBSD router has a Realtek (onboard) and an intel (X540 pcie) network
> card, and in one particular situation I get very slow speed.
> I tested using iperf3 and also sftp put/get.
>
> Here goes:
> (1) When I transfer from/to a host/net A to the router on re0 I get
> symmetrical 1Gbps
> (2) When I transfer from/to a host/net B to the router on ix0 I also get
> symmetrical 1Gbps
> (3) When I transfer from host/net A to host/net B through the router (re0
> -> ix0) I get 1Gbps
> (4) When I transfer from host/net B to host/net A through the router (ix0
> -> re0) I get a crawling 3Mbps
>
> To make sure, I did a fresh install from 7.4 from scratch (okay i forgot to
> syspatch it), pfctl -d, sysctl net.ip.forwarding=1 and I got the same
> result.
>
> When I use another OS (tried Arch linux and OPNSense) I get full 1Gbps in
> all 4 scenarios.
>
> I'm at a loss and will appreciate any help, short of filing a bug.
> Below dmesg and pcidump.
> Thanks in advance !
> Pierre
>
> {SNIP}
--
Aaron Mason - Programmer, open source addict
I've taken my software vows - for beta or for worse
