Date: Sun, 27 Dec 2015 09:06:37 -0600 From: Karl Denninger <karl@denninger.net> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: fyi: 11.0-current rpi2 systat -vmstat shows around 24k interrupts for bcm283x_dw Message-ID: <567FFE7D.40403@denninger.net> In-Reply-To: <61560100-FB03-4A14-A869-25B1EF818F48@dsl-only.net> References: <0A781C7D-C5F5-4931-AE38-D2FEC0848DCA@dsl-only.net> <CAJ-VmonB%2BcuuEo6f7%2BU=hP9iQEnXxGxuAay1nOOpThhpnM=rcQ@mail.gmail.com> <85B1DF09-7D67-4031-B1E9-E4754CDC690A@dsl-only.net> <61560100-FB03-4A14-A869-25B1EF818F48@dsl-only.net>
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On 12/27/2015 02:33, Mark Millard wrote:
> [I've moved the irq17 counts material into a tail section.]
>
> On 2015-Dec-26, at Sat Dec 26 23:07:43 UTC 2015 Karl Denninger <karl at denninger.net> wrote:
>
>> Hmmm... I wonder if this is related to the bcm sound driver going "mute"
>> and needing a reboot to recover?
> I've never plugged anything into the audio jack. The DVI monitor (via HDMI->DVI cable) is soundless. (I've not wanted any sound from the rpi2 so far and have done nothing to explicitly try to initiate such activity.) The numbers are in the same range right after booting.
I have several Pi2s running here doing various things and all show the
same characteristic (very high) interrupt rate on that channel. Some
are on hard-wired Ethernet and a couple on USB-WiFi dongles. None have
keyboards, mice, or displays connected.
> The dmesg -a output shows more information about irq17:
>
>> bcm283x_dwcotg0: <DWC OTG 2.0 integrated USB controller (bcm283x)> mem 0x980000-0x99ffff irq 17 on simplebus0
>
> Booting with just the keyboard on usb (no Ethernet cable, no mouse, etc.) still shows the same range of figures. Then unplugging the keyboard while systat -vmstat is still displayed does not change the range either.
Yep. The rate does not appear to depend on what I have connected (or
don't) to the various ports here.
--
Karl Denninger
karl@denninger.net <mailto:karl@denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/
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