On 3/4/24 21:39, Alexander Motin wrote:
AFAIK it is only a workaround. I saw it myself on number of
different USB dongles and laptops, that USB starting experience some
problems with multiple NIC queues and some other factors. IIRC the
Realtek driver was much more stable once I limited it to one queue
and some other hacks. IIRC if_cdce just has only one queue and other
limitations, that not only makes it more stable, but also much
slower. It would be good to understand what's wrong is there
exactly, since IMHO it is a big problem now. Unfortunately HPS was
unable to reproduce it on his laptop (that makes me wonder if is is
specific to chipset(s) or thunderbolt?), so it ended nowhere so far.
I have a Lenovo USB 3 dongle, so no thunderbolt.
I also use USB3 dongles. But in my laptops the USB 3 ports are
provided by Intel Thunderbolt controller, while in HPS' they were
plain from USB3 controller. Though it may be just a coincidence.
I don't think (how do I know?) I have thunderbolt in this Lenovo AMD
Ryzen laptop.
USB ID 0x17ef/0x7205
rgephy1: <RTL8251/8153 1000BASE-T media interface> PHY 0 on miibus1
I tried using the cdce driver, it gives me < 100Mb/s, while the ure
driver gets > 500Mb/s
Right, I saw about the same.
Just to try something else, I got another USB dongle, I does the exact
same thing:
ugen1.10: <ASIX Elec. Corp. AX88179> at usbus1
axge0 on uhub6
axge0: <ASIX Elec. Corp. AX88179, rev 3.00/1.00, addr 9> on usbus1
miibus1: <MII bus> on axge0
rgephy1: <RTL8169S/8110S/8211 1000BASE-T media interface> PHY 3 on miibus1
rgephy1: none, 10baseT, 10baseT-FDX, 10baseT-FDX-flow, 100baseTX,
100baseTX-FDX, 100baseTX-FDX-flow, 1000baseT-FDX, 1000baseT-FDX-master,
1000baseT-FDX-flow, 1000baseT-FDX-flow-master, auto, auto-flow
ue0: <USB Ethernet> on axge0
ue0: Ethernet address: xx:xx:xx:xx:xx:xx
ue0: link state changed to DOWN
ue0: link state changed to UP
ue0: link state changed to DOWN
ue0: link state changed to UP
ue0: link state changed to DOWN
ue0: link state changed to UP
ue0: link state changed to DOWN
ue0: link state changed to UP
ue0: 2 link states coalesced
ue0: link state changed to UP
