DWC OTG TX path optimisation for 11-current

[Hans Petter Selasky]

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?

--HPS