Re: looking for testers for if_rge - RTL8125/8126/8127 ethernet driver

On 23.11.25 03:16, Adrian Chadd wrote:
> hi!
> 
> i've ported Kevin Lo's openbsd driver for these realtek chipsets to FreeBSD.
> It works well enough for me to use on my laptop w/ RTL8125B / Killer E3000.
> I'm now opening it up to others who are willing to build/run a kernel 
> module to test the driver out and report back.
> 
This is great. Finally, an in tree driver for these very common NICs. 
The 1100.00 version of the net/realtek-re-kmod was just unreliable for 
me (constant hangs, no matter which options I turned off and on). I've 
only done light testing with the official 1101.00 driver. I was able to 
wedge it with less than a minute of iperf3, and the ifconfig down/up 
dance that was able to revive the interface with 1100.00 was not able to 
recover the interface.

I ran if_rge on my NAS and did some testing. I haven't had one hang with 
this driver, even after pounding the network for hours. That's a big 
plus for me. Thanks.

I was able to achieve close to 2.5Gb/s TX and close to 1Gb/s RX with 
iperf3 --bidir.

CPU usage appears to be substantially higher than with the official 
Realtek driver.

[intr{irq59: rge0}] goes to around 50% of one core, and [kernel{rge0 
taskq thread}] hovers between 20-25% when running the above iperf3 tests.

With the official 1101.00 driver, the only process using > 1% CPU is 
this one [kernel{re0 taskq}] and it is around 10% with the test 
mentioned above.

The system is
CPU: AMD Ryzen 9 7940HS w/ Radeon 780M Graphics      (3992.64-MHz 
K8-class CPU)

rge0@pci0:1:0:0:        class=0x020000 rev=0x05 hdr=0x00 vendor=0x10ec 
device=0x8125 subvendor=0x1f4c subdevice=0xb002
     vendor     = 'Realtek Semiconductor Co., Ltd.'
     device     = 'RTL8125 2.5GbE Controller'
     class      = network
     subclass   = ethernet
     bar   [10] = type I/O Port, range 32, base 0xf000, size 256, enabled
     bar   [18] = type Memory, range 64, base 0xdcb00000, size 65536, 
enabled
     bar   [20] = type Memory, range 64, base 0xdcb10000, size 16384, 
enabled

All tests were done with FreeBSD-kernel-generic-nodebug-16 kernels from 
the last couple of days.

Florian