Date: Wed, 29 Jul 2015 13:01:43 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Svatopluk Kraus <onwahe@gmail.com> Cc: Jia-Shiun Li <jiashiun@gmail.com>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: [RPI-B] [HEADS UP] DWC OTG TX path optimisation for 11-current Message-ID: <55B8B297.1010008@selasky.org> In-Reply-To: <CAFHCsPUMaYEwJsaGUFuw9yZi_5bmraSBsOYpRWvSeuebpXBJUA@mail.gmail.com> References: <55A7D8CE.4020809@selasky.org> <CAHNYxxMp9jGDbV-5=-cE6daR-O3eN5pdvO1s-=QfX=A9XYqYmA@mail.gmail.com> <55B23276.8090703@selasky.org> <CAHNYxxNc9uB62hHEv1PM9PcsGgUs=zsvNgatqLD0p%2BiiDA3Aiw@mail.gmail.com> <55B73113.2020308@selasky.org> <CAFHCsPVaPZpqXLS7OApa=Xz5VLnLjVpV5dYV8Pn2uHh1Lcz7Tg@mail.gmail.com> <55B8AB76.7030603@selasky.org> <CAFHCsPUMaYEwJsaGUFuw9yZi_5bmraSBsOYpRWvSeuebpXBJUA@mail.gmail.com>
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On 07/29/15 12:42, Svatopluk Kraus wrote: > On Wed, Jul 29, 2015 at 12:31 PM, Hans Petter Selasky <hps@selasky.org> wrote: >> 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. >> > > Yes, I know about that. The r285068 was applied in both kernels. > Hi, The "sys" and "user" times are down. While the "real" time is up. That means more sleeping??? There is a knob in "hw.usb.umass.throttle" which you can set to slow down the disk access. Maybe it's reading files faster than before and then starts swapping? --HPS
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