Re: Debian-13 bad performance on IPC

* nwe <[email protected]>
| On 7/3/26 11:27 AM, Ralf Fassel wrote:
>
| > [bad system performance]
| You might want to check what cpu power configuration is available in
| the bios firmware. Your IPC or motherboard manual should have
| instructions how to get into that, during boot, before grub starts.
>
| A lot of 'compact' PCs provide a method of setting high performance vs
| quiet or energy saving. I'm of the opinion linux generally obeys that
| hardware setting but windows sometimes has ways of overriding it and
| using max power anyway. This can give the illusion of windows
| performing better than linux.

I found an entry
      BIOS - Advcanced - CPU Power Management Control
      - *disable* CPU C states
(which says something like "allow CPU to go to C states if not used 100%")

So I tried 'disabled' (it was enabled).

I then see the CPUs not throttling down to 'idle' so easily by 'watch'ing
  /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq

Other than that there is "Turbo Mode ON/OFF" (is ON), and
TDP Configurations, where I changed "Power Limit 1" and ...2 from 15000
to 0 (= no custom override).


=> But all of these changes make no difference for the processing times -
still the start of one or two of the sub-processes is delayed which then
results in the large overall response time.

| If that's not it then I might investigate whether there is some
| missing firmware. A starting point might be
| sudo dmesg | grep -Ei 'fail|error'
| to see whether anything jumps out.

Some ACPI unresolved symbols errors "\_SB.UBTC.RUCC AE_NOT_FOUND", but
other than that nothing.

TNX
R'