On Wednesday 19 October 2011 23:34:41 Marcus Müller wrote:
Hi all!
I need some advice how to best tackle this problem I'm having with an
ADMtek USB To LAN Converter in conjunction with an nVidia nForce MCP79 USB
chip:
--- config begin ---
root@creutzfeld:(~)# uname -a
FreeBSD creutzfeld.z.net 8.2-STABLE FreeBSD 8.2-STABLE #7 r226546: Wed Oct
19 22:08:28 CEST 2011 root@creutzfeld:/usr/obj/usr/src/sys/CREUTZFELD
amd64 root@creutzfeld:(~)# usbconfig list
ugen0.1: OHCI root HUB nVidia at usbus0, cfg=0 md=HOST spd=FULL (12Mbps)
pwr=SAVE ugen1.1: EHCI root HUB nVidia at usbus1, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=SAVE ugen2.1: OHCI root HUB nVidia at usbus2, cfg=0
md=HOST spd=FULL (12Mbps) pwr=SAVE ugen3.1: EHCI root HUB nVidia at
usbus3, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=SAVE ugen3.2: USB To LAN
Converter ADMtek at usbus3, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON
ehci1: NVIDIA nForce MCP79 USB 2.0 controller mem 0xfae7e800-0xfae7e8ff
irq 21 at device 6.1 on pci0 --- config end ---
This ADMtek device gets roughly 10MBit downstream with the configuration
above. When used with the same OS on a board with an Intel 82801GB/R
(ICH7) USB 2.0 controller it gets 64MBit downstream, which is the maximum
I can get from my ISP.
I don't see anything unusual in the system messages, thus I suspect it's an
issue with the USB implementation for the nForce chipset.
What can I do in order to find out what's the bottleneck here?
Hi,
The Nvidia chipsets are quirked due to what looks like hardware issues. See
sys/dev/usb/controller/ehci_pci.c. This affects performance.
Also see sysctl hw.usb.ehci.
--HPS
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