Date: Thu, 20 Oct 2011 09:11:21 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Subject: Re: bad performance of aue device when used with nVidia nForce MCP79 USB Message-ID: <201110200911.21936.hselasky@c2i.net> In-Reply-To: <A54E761C-0326-4118-95B6-5386B1B729BC@mulle-kybernetik.com> References: <A54E761C-0326-4118-95B6-5386B1B729BC@mulle-kybernetik.com>
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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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