DWC OTG TX path optimisation for 11-current

[Svatopluk Kraus]

On Tue, Aug 18, 2015 at 3:40 PM, Hans Petter Selasky <hps at selasky.org> wrote:
> On 08/18/15 15:34, Svatopluk Kraus wrote:
>>
>> On Tue, Aug 18, 2015 at 3:23 PM, Hans Petter Selasky <hps at selasky.org>
>> wrote:
>>>
>>> On 08/18/15 15:12, Svatopluk Kraus wrote:
>>>>
>>>>
>>>> On Tue, Aug 18, 2015 at 2:46 PM, Hans Petter Selasky <hps at selasky.org>
>>>> wrote:
>>>>>
>>>>>
>>>>> On 08/18/15 14:31, Svatopluk Kraus wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Tue, Aug 18, 2015 at 1:54 PM, Hans Petter Selasky <hps at selasky.org>
>>>>>> wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> On 08/18/15 13:22, Svatopluk Kraus wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Do I understand it well that you are not able to trigger the
>>>>>>>> problem?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Maybe I haven't been trying hard enough. I've been using a kernel
>>>>>>> built
>>>>>>> from
>>>>>>> "projects/hps_head" which I just updated to include the latest DWC
>>>>>>> OTG
>>>>>>> patches, instead of "head". There was today a timer subsystem fix,
>>>>>>> not
>>>>>>> sure
>>>>>>> if it makes any difference:
>>>>>>>
>>>>>>> https://svnweb.freebsd.org/changeset/base/286880
>>>>>>>
>>>>>>> I will try to buildworld from an external USB disk later today and
>>>>>>> see
>>>>>>> what
>>>>>>> happens.
>>>>>>>
>>>>>>>>
>>>>>>>> and still the system response time is terrible.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> If you can do:
>>>>>>>
>>>>>>> usbconfig -d 0.1 set_config 255
>>>>>>>
>>>>>>> And verify that the IRQ rate goes to zero for DWC OTG, then we maybe
>>>>>>> could
>>>>>>> rule out USB.
>>>>>>>
>>>>>>
>>>>>> Note that my root filesystem was on usb disk.
>>>>>>
>>>>>
>>>>> Is the console still not responding properly after this command?
>>>>>
>>>>
>>>> System response time is still bad.
>>>>
>>>
>>> Is "kgdb" working on your setup? Can you dump all kernel threads?
>>
>>
>> db> ps
>>    pid  ppid  pgrp   uid   state   wmesg     wchan    cmd
>
>
>>
>
> Not "ps", but "alltrace" I think.
>


All trace is attached.