New interrupt code slows hyperthreading down

Lars Eggert larse at ISI.EDU
Fri Nov 7 13:28:34 PST 2003

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.

Lars Eggert <larse at>           USC Information Sciences Institute
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