Fwd: Interrupt Overload

[Dutch Ingraham]

On 06/07/2014 11:09 AM, Vladislav Prodan wrote:
> 
> 
>  
>  --- Original message ---
>  From: "Dutch Ingraham" <stoa at gmx.us>
>  Date: 7 June 2014, 17:33:33
>   
> 
> 
>> On 06/07/2014 09:53 AM, Hans Petter Selasky wrote:
>>> On 06/07/14 15:05, Dutch Ingraham wrote:
>>>>
>>>> Hi everyone - I am resending this as it is not appearing in the archives
>>>> so I don't believe it made it to the general list-serv. (My apologies if
>>>> it actually did make it.)
>>>>
>>>
>>> Hi,
>>>
>>> UHCI controllers should not produce more than 1000 IRQ/s. Is the
>>> interrupt perhaps shared?
>>>
>>> --HPS
>>>
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>>>
>> Thanks, Hans. Here's some output from <vmstat -i>:
>>
>> interrupt total rate
>> irq1 atkbd0 48 0
>> irq16 uhci0 19937714 43248
>> irq18 atapci0+ 886 1
>> [snip]
>>
>> There are no other UHCI's in the list.
>>
>> A <dmesg | grep uhci> produces only one instance at uhci0:
>>
>> "uhci0: <UHCI (generic) USB controller> port 0xff20-0xff3f \
>> irq16 at device 26.0 on pci0"
>>
>> Is there another command you're thinking of to produce better information?
> 
> 
> Show command output:
> sysctl kern.eventtimer.choice  kern.eventtimer.timer
> 
> 
> Try changing the type of timer:
> sysctl kern.eventtimer.timer=LAPIC
> 
> 
> 
> --
>  Vladislav V. Prodan
>  System & Network Administrator
>  support.od.ua
>  
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> 

Thanks for the response.

The output you requested:

kern.eventtimer.choice: HPET1 (440) HPET2 (440) HPET3 (440) HPET4 (440)
HPET5 (440) HPET6 (440) LAPIC (400) i8254 (100) RTC (0)

kern.eventtimer.choice: HPET  (did not specify 1, 2, etc.)

I also changed the type of timer to LAPIC and rebooted; there was no
appreciable change in the interrupt activity.


I'm open to any other suggestions, as the system is virtually unusable
in this state.