From owner-freebsd-arm@freebsd.org  Wed Jul 29 10:29:53 2015
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Date: Wed, 29 Jul 2015 12:31:18 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Svatopluk Kraus <onwahe@gmail.com>
CC: Jia-Shiun Li <jiashiun@gmail.com>, 
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Subject: Re: [RPI-B] [HEADS UP] DWC OTG TX path optimisation for 11-current
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On 07/29/15 12:08, Svatopluk Kraus wrote:
> On Tue, Jul 28, 2015 at 9:36 AM, Hans Petter Selasky <hps@selasky.org> wrote:
>> Hi,
>>
>> Can you test this:
>>
>> https://svnweb.freebsd.org/changeset/base/285935
>>
>
> I'm hunting some strange behaviour slowdowning my set RPI2 - usb3 hub
> - usb3 disk during buildworld, but I have noticed the following:
>
> make -j6 buildworld
>
> before r285935 -> 60145.29 real    350932.67 user     36402.54 sys
> after r285935 -> 67831.38 real    196310.43 user     19135.73 sys
>
> The kernel before r285935 was day or two older.
>
> These are just one-run times, however the difference is quite big. The
> change r285935 could influence the thing I'm investigating so it's
> worse now, but still ...
>

Regarding build times you should also take "r285068" into account.

--HPS