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Making a Linux home server sleep on idle and wake on demand (2023)

(dgross.ca)
294 points AgaoAnar | 9 comments | 02 Sep 25 19:42 UTC | HN request time: 0.001s | source | bottom
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2OEH8eoCRo0 ◴[02 Sep 25 20:44 UTC] No.45108785[source]▶
Have you measured the power consumption of your "high power consumption" server?
replies(3): >>45109039 #>>45109962 #>>45110348 #
jeffbee ◴[02 Sep 25 21:05 UTC] No.45109039[source]▶
Seriously. You can get running states around 1W these days.
replies(3): >>45109835 #>>45110165 #>>45110346 #
1. wiredpancake ◴[02 Sep 25 22:53 UTC] No.45110165[source]▶
Running states around 1W? How?
replies(3): >>45110210 #>>45110528 #>>45111323 #
2. ◴[02 Sep 25 22:58 UTC] No.45110210[source]▶
3. jeffbee ◴[02 Sep 25 23:38 UTC] No.45110528[source]▶
Only put the RAM you need in the box, use peripherals with working ASPM, attach them to the northbridge PCI ports instead of the CPU's root ports, use wireless instead of wired networking, and don't attach a display.
replies(1): >>45110781 #
4. wiredpancake ◴[03 Sep 25 00:13 UTC] No.45110781[source]▶
I do basically all of that, CPU idles around 5% but still consumes over 100W. (Minus the Wireless part)

(5800X + 64GB)

I can enable Eco Mode in the BIOS, which will bring down the CPU to about 65W max although its still at about 100W total system.

replies(2): >>45110815 #>>45111342 #
5. jeffbee ◴[03 Sep 25 00:18 UTC] No.45110815{3}[source]▶
Whatever software you are using is totally, utterly broken. Not sure what else I can tell you. Even a completely decked out Ryzen AI Max Pro 395 idles at 5W in Windows S0 (see: https://h20195.www2.hp.com/v2/getpdf.aspx/c09133726.pdf)
6. supertrope ◴[03 Sep 25 01:34 UTC] No.45111323[source]▶
1W is a unicorn as just plugging in a power supply with no PC parts hooked up will register 1W. <10W is more realistic. Select a PC that can run off a laptop charger. Check manufacturer spec sheets for the idle power consumption. Don't install any PCIe cards or hard drives. Use powertop --autotune.
replies(1): >>45111337 #
7. dragonwriter ◴[03 Sep 25 01:36 UTC] No.45111337[source]▶
> Select a PC that can run off a laptop charger.

(looking at my 330W laptop charger)

I’m not sure that is the constraint you think it is.

replies(1): >>45111348 #
8. supertrope ◴[03 Sep 25 01:36 UTC] No.45111342{3}[source]▶
Chiplet based Ryzen CPUs inherently have higher idle power draw. Monolithic chips like 5600G have lower idle power draw. The motherboard, power supply, and internal peripherals all need to be carefully selected to get a really low idle figure.
9. supertrope ◴[03 Sep 25 01:37 UTC] No.45111348{3}[source]▶
To be more specific a 65W or 90W laptop power supply.