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Date:      Tue, 18 Aug 2015 15:23:35 +0200
From:      Hans Petter Selasky <hps@selasky.org>
To:        Svatopluk Kraus <onwahe@gmail.com>
Cc:        "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>
Subject:   Re: DWC OTG TX path optimisation for 11-current
Message-ID:  <55D331D7.9080702@selasky.org>
In-Reply-To: <CAFHCsPU=OtdS9XCcbRQwEsymsjTq6aEtnNbDYOmS7DzHaKv7sA@mail.gmail.com>
References:  <55A7D8CE.4020809@selasky.org> <55B73113.2020308@selasky.org> <CAFHCsPVaPZpqXLS7OApa=Xz5VLnLjVpV5dYV8Pn2uHh1Lcz7Tg@mail.gmail.com> <55B8AB76.7030603@selasky.org> <CAFHCsPUMaYEwJsaGUFuw9yZi_5bmraSBsOYpRWvSeuebpXBJUA@mail.gmail.com> <55B8B297.1010008@selasky.org> <CAFHCsPVGLs8j6LAV%2Bg4rP_ueTOd8pUOupYFGvmgC3XGcJC720Q@mail.gmail.com> <20150729154516.GH78154@funkthat.com> <55B8F5EC.2050908@selasky.org> <46ad096c958.1a82a175@mail.schwarzes.net> <55B9C3E2.5040501@selasky.org> <46ae815c7c3.447237c8@mail.schwarzes.net> <46aece00b53.3c1cdc1f@mail.schwarzes.net> <55BB2A5F.9000502@selasky.org> <46baa16c4ce.6efd29ef@mail.schwarzes.net> <55CF31A1.5080205@selasky.org> <CAFHCsPUKwNLkeSPSHHUs=vwFFAnBd_9HRPxaS6tEC0cR3y_C6Q@mail.gmail.com> <55D31D11.3050509@selasky.org> <CAFHCsPXbBSpkDtggN%2BiBm=vpYwOTpi7nH=Z0G4RiyvoVXuw7_g@mail.gmail.com> <55D32912.1070707@selasky.org> <CAFHCsPU=OtdS9XCcbRQwEsymsjTq6aEtnNbDYOmS7DzHaKv7sA@mail.gmail.com>

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On 08/18/15 15:12, Svatopluk Kraus wrote:
> On Tue, Aug 18, 2015 at 2:46 PM, Hans Petter Selasky <hps@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@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



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