fyi: 11.0-current rpi2 systat -vmstat shows around 24k interrupts for bcm283x_dw

[Mark Millard]

[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.

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.






Older material showing the large Interrupt rate for bcm283x_dwco(tg0)


> On 2015-Dec-26, at 2:55 PM, Adrian Chadd <adrian.chadd at gmail.com> wrote:
>> 
>> What's teh output of 'vmstat -ia' ?
>> 
>> 
>> -a
>> 
> 
> # vmstat -ia
> interrupt                          total       rate
>                                       0          0
> irq1: mbox0                         9128          0
> irq2: vchiq0                           3          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
> irq17: bcm283x_dwco           1724827933         36
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
> irq24: bcm_dma0                        0          0
> irq25: bcm_dma0                        0          0
> irq26: bcm_dma0                      892          0
> irq27: bcm_dma0                        0          0
> irq28: bcm_dma0                        0          0
> irq29: bcm_dma0                        0          0
> irq30: bcm_dma0                        0          0
> irq31: bcm_dma0                        0          0
> irq32: bcm_dma0                        0          0
> irq33: bcm_dma0                        0          0
> irq34: bcm_dma0                        0          0
> irq35: bcm_dma0                        0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
> irq57: gpio0                           0          0
> irq58: gpio0                           0          0
> irq59: gpio0                           0          0
> irq60: gpio0                           0          0
> irq61: iichb0                          0          0
> irq62: spi0                            0          0
>                                       0          0
>                                       0          0
> irq65: uart0                        2253          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
> irq70: sdhci_bcm0                    448          0
>                                       0          0
> irq72: generic_time                    0          0
> irq73: generic_time             17291857          2
>                                       0          0
> irq75: generic_time                    0          0
> irq76: ipi                       9086219          7
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
>                                       0          0
> . . . very many double zeros omitted . . .
> Total                         1751218733      24478
> 
===
Mark Millard
markmi at dsl-only.net