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Date:      Fri, 22 Dec 2023 08:23:24 -0600
From:      Mike Karels <mike@karels.net>
To:        Steve Bernacki <steve@copacetic.net>
Cc:        freebsd-arm@FreeBSD.org
Subject:   Re: FreeBSD 14.0-RELEASE and Raspberry Pi CM4 4GB
Message-ID:  <F037F5CF-07D7-499B-AA36-274EEADC34D0@karels.net>
In-Reply-To: <445940f7-e8f1-4dbc-87be-99bfd705141d@copacetic.net>
References:  <445940f7-e8f1-4dbc-87be-99bfd705141d@copacetic.net>

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On 22 Dec 2023, at 6:20, Steve Bernacki wrote:

> I recently purchased a RPI CM4 with 4GB and 32GB eMMC to replace my agi=
ng FreeBSD firewall. I managed to install FreeBSD 14.0-RELEASE-p3 on it, =
and both Ethernet devices (genet0 and ue0) were properly identified. Howe=
ver, network throughput on my gigabit network is pretty bad; iperf3 repor=
ts a maximum transfer speed of 291 Mbits/sec. Flashing OpenWRT on the sam=
e hardware using the same ethernet port, I'm able to achieve 923 Mbits/se=
c.
>
> Does anyone have any suggestions on how to improve throughput under Fre=
eBSD?
>
> Thank you
> Steve

I just tested with an RPi4 (4 GB) and 14.0 using iperf3.  It looks like I=
'm getting
a rather variable number of retransmissions.  On my first run (client on =
RPi 4),
I got 460 Mb/s with a lot of retransmissions, but the next couple of runs=
, including
one receiving, I got about 940 Mb even with some retransmissions.  The pe=
ers were
fairly fast FreeBSD 13.2 and 15-current systems.  Are you seeing retransm=
issions?

I'll try to look into this, but I'm not sure when I'll get to it.

		Mike



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