New interrupt code slows hyperthreading down

Jens Rehsack rehsack at liwing.de
Fri Nov 7 13:41:36 PST 2003


Lars Eggert wrote:
> John Baldwin wrote:
> 
>> On 07-Nov-2003 Lars Eggert wrote:
>>
>>> Jens Rehsack wrote:
>>>
>>>> interrupt                          total       rate
>>>> irq1: atkbd0                         512          2
>>>> irq8: rtc                          23419        127
>>>> irq13: npx0                            1          0
>>>> irq14: ata0                         4422         24
>>>> irq15: ata1                           82          0
>>>> irq16: uhci0 uhci3               5379815      29238
>>>
>>>
>>> This looks similar to what I described in the "fwohci0 running wild" 
>>> thread. In both cases, irq16 seems to cause the problem...
>>
>>
>> Really.  Does this only happen with ACPI enabled?
> 
> Don't know about "only", since I have never booted this machine without 
> ACPI. I'll test next time I'm rebooting.

Don't do it. I do it for testing a few minutes ago - and it
prevents irq 16 from storming. But it does because the machine
hangs at boot with:
isa_probe_children: probing PnP devices

I let it probe for about 10 minutes (you'll never know :-)),
but it wont do.

Jens



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