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SubjectRe: [2.5.53] So sloowwwww......
>
>
>>
>> >From the .config, it looks like you have a P4. I'm not
>> seeing that regression on K6/2 or P3 Xeon.
>
>That's correct, I have a P4.
>Maybe something related to the CPU, but I hardly see what it can
>be...
>
>
I'd guess power management, a runaway interrupt, bad mtrr settings,
problems with the memory map decoding or Hyperthreading.

Check
/proc/interrupts
/proc/mtrr
The memory detection results at the top of dmesg
disable apm, acpi.
Check anything Hyperthreading related in dmesg.



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