Date: Wed, 12 Aug 2015 16:41:03 +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: <55CB5AFF.20805@selasky.org> In-Reply-To: <55CB4BAF.3050702@selasky.org> References: <55A7D8CE.4020809@selasky.org> <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> <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> <55BB3CC6.4030002@selasky.org> <CAFHCsPXFJ_XhVsT1bRw=d20Mz=cbYdmwNNLvfs_cxJvEo8B6LA@mail.gmail.com> <55BB6A7F.3060402@selasky.org> <CAFHCsPVz4cYGrZRxVz9givvct_b1CagH1W%2BbTzS1v%2Bc3sws3LQ@mail.gmail.com> <55CB4BAF.3050702@selasky.org>
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On 08/12/15 15:35, Hans Petter Selasky wrote: > On 07/31/15 17:11, Svatopluk Kraus wrote: >> Note that I got about 24000 interrupts per a second during buildworld >> too. If I remember it correctly, it was about 4000 before r285935. >> When the trigger is pulled, the count is changing (in range of 4000 to >> 21000). It looks like something is taking more time (interrupt >> servicing probably). According to "systat -v", disk is going to be >> 100% (and more) busy very often for example. > > Hi, > > Finally my RPI-2 arrived :-) > > After r285935 we are polling for data more frequently, so the IRQ rate > will go up. 3x 8000 IRQs/second would be normal to query the device > every 125us, which the EHCI does. > > Can you give me some more information about your setup, so that I can > reproduce it? > > How many USB devices are there in total, and how are the filesystems > mounted? > > --HPS Are you using SSH or UART for console? --HPS
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