time accounting problem (powerpc only?)
joerg at alea.gnuu.de
Sun Nov 25 21:31:39 EST 2007
Johannes Berg <johannes at sipsolutions.net> wrote:
>> % diff /proc/interrupts <(sleep 2; cat /proc/interrupts)
>> --- /proc/interrupts 2007-11-23 15:04:06.004846901 +0100
>> +++ /proc/self/fd/11 2007-11-23 15:04:05.952841422 +0100
>> @@ -1,15 +1,15 @@
>> - 25: 18063968 MPIC 1 Level VIA-PMU
>> + 25: 18064241 MPIC 1 Level VIA-PMU
>> - 42: 1415066 MPIC 1 Level keywest i2c
>> - 47: 2075159 MPIC 1 Level GPIO1 ADB
>> - 48: 6686659 MPIC 1 Level radeon at pci:0000:00:10.0
>> + 42: 1415084 MPIC 1 Level keywest i2c
>> + 47: 2075193 MPIC 1 Level GPIO1 ADB
>> + 48: 6686778 MPIC 1 Level radeon at pci:0000:00:10.0
>> I don't know where they come from, but that's the cause of the high IRQ
> Are you sure about that?
No, I saw the high hardware interrupt value in top and looked at
/proc/interrupts and concluded that those are the evil source of the
> I'm fairly sure that I always had rather high numbers of interrupt
> here. And the system isn't sluggish or unresponsive as you'd expect if
> the IRQs actually did take 90% of the CPU time!
Okay, so what might be the source?
Doesn't really nobody else see this values? At least, Elimar
Riesebieter has the same problem. He reported on debian-powerpc.
Treffen sich zwei Funktionen.
Sagt die eine: „Verschwinde oder ich differenzier' dich!“
Erwidert die andere: „Ätsch, ich bin exponentiell!“
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