Fwd: AW: axge0 and AX88179

[Oleg Lelchuk]

---------- Forwarded message ----------
From: Oleg Lelchuk <oleglelchuk at gmail.com>
Date: Wed, Jul 5, 2017 at 10:17 AM
Subject: Re: AW: axge0 and AX88179
To: Hans Petter Selasky <hps at selasky.org>


You are addressing it to Shteryana, right?

On Wed, Jul 5, 2017 at 7:21 AM, Hans Petter Selasky <hps at selasky.org> wrote:

> On 07/05/17 07:28, Oleg Lelchuk wrote:
>
>> Yes, I am having exactly the same problem that Shteryana described. I also
>> got messages about wrong ip length when I started dhclient for ue0. If I
>> plug my device into a usb 2.0 port and enable flow control, I get
>> networking speeds that are around 250 Mbit/sec. If flow control is
>> disabled
>> and the device is still connected to the usb 2.0 port, then I get speeds
>> around 200 Mbit/sec. When the device is attached to a usb 3.0 port and the
>> flow control is enabled, I get speeds that are around 128 Mbit/sec. The
>> speeds drop to something like 40 Mbit/sec when the flow control is
>> disabled
>> and the device is still attached to the usb 3.0 port. But I enabled flow
>> control only on one machine. It was the machine to which the device was
>> attached to. I didn't enable flow control on the other machine on the
>> network, but I am sure my speeds won't get much improvement even if it's
>> enabled on both machines.
>> Since I just joined the list, let me copy and paste Shteryana's email
>> message that she wrote a while back:
>>
>> Hi all,
>>
>> I've experienced a similar problem but didn't get to analyzing it
>> deeper (or reporting) unfortunately ; the device is
>>
>> ugen0.8: <ASIX Elec. Corp. AX88179> at usbus0, cfg=0 md=HOST spd=SUPER
>> (5.0Gbps) pwr=ON (124mA)
>>
>>    bLength = 0x0012
>>    bDescriptorType = 0x0001
>>    bcdUSB = 0x0300
>>    bDeviceClass = 0x00ff  <Vendor specific>
>>    bDeviceSubClass = 0x00ff
>>    bDeviceProtocol = 0x0000
>>    bMaxPacketSize0 = 0x0009
>>    idVendor = 0x0b95
>>    idProduct = 0x1790
>>    bcdDevice = 0x0100
>>    iManufacturer = 0x0001  <ASIX Elec. Corp.>
>>    iProduct = 0x0002  <AX88179>
>>    iSerialNumber = 0x0003  <000000000000C>
>>    bNumConfigurations = 0x0001
>>
>> what I've noticed so far -
>>
>> dhclient complains about wrong ip length -
>>
>> % sudo dhclient ue1
>> DHCPDISCOVER on ue1 to 255.255.255.255 port 67 interval 7
>> ifconDHCPDISCOVER on ue1 to 255.255.255.255 port 67 interval 15
>> ip length 328 disagrees with bytes received 332.
>> accepting packet with data after udp payload.
>> DHCPOFFER from 192.168.10.1
>> DHCPREQUEST on ue1 to 255.255.255.255 port 67
>> ip length 328 disagrees with bytes received 332.
>> accepting packet with data after udp payload.
>> DHCPACK from  192.168.10.1
>> bound to  192.168.10.7 -- renewal in 3600 seconds.
>>
>> Running iperf3 & watching netstat -i at the same time on the interface
>> in question shows increasing InErrors on the interface -
>> Name    Mtu Network       Address              Ipkts Ierrs Idrop
>> Opkts Oerrs  Coll
>> ...
>> ue1    1500 <Link#4>      00:0e:c6:c6:db:ea    66333   354     0
>> 35939     0     0
>> ue1       - 192.168.10.0/24  192.168.10.7           66323     -     -
>>    35927     -     -
>>
>> Iperf reports ~37.1 Mbits/sec on the interface.
>>
>> If I attach the device on a USB2 port (or force USB2 speed on the
>> port) I was able to get ~ 150-200Mbits on the same system with the
>> same device.
>>
>> This particular system has an Intel Lynx Point USB 3.0 controller
>>
>> pciconf -lv | grep -A 4 xhcixhci0 at pci0
>> <https://lists.freebsd.org/mailman/listinfo/freebsd-net>:0:20:0:
>> class=0x0c0330 card=0x8179103c chip=0x8c318086
>> rev=0x05 hdr=0x00
>>      vendor     = 'Intel Corporation'
>>      device     = '8 Series/C220 Series Chipset Family USB xHCI'
>>      class      = serial bus
>>      subclass   = USB
>>
>> ,is running FreeBSD 12.0-CURRENT #19 r315483M (M stands for a patch
>> similar to https://people.freebsd.org/~syrinx/freebsd_xhci-20170318-01.
>> diff
>> needed to trick the controller on that particular system to actually
>> use USB3.0 speeds).
>>
>> The same ASIX AX88179 device worked just fine reaching over 500
>> Mbits/sec on another system running 11.0-RELEASE-p7 with a different
>> USB 3 controller (will double check and report back at first
>> opportunity).
>>
>> Hope this helps.
>>
>
> Hi,
>
> Maybe you can try to use "usbdump -i usbusX -f Y -s 65536" to compare the
> USB traffic on both of these controllers in USB 3.0 mode. Make some stats
> on the transfer lengths and look for USB errors.
>
> --HPS
>
>