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

(dgross.ca)
294 points AgaoAnar | 3 comments | 02 Sep 25 19:42 UTC | HN request time: 0.527s | source
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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?
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jeffbee ◴[02 Sep 25 21:05 UTC] No.45109039[source]▶
Seriously. You can get running states around 1W these days.
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1. shellwizard ◴[02 Sep 25 23:15 UTC] No.45110346[source]▶
Are you talking about processor's C-states? My old 6th gen i3 stays most of the time idling around C8, averaging 5w, really impressive, I suppose newer gens will be even more efficient
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2. jeffbee ◴[03 Sep 25 00:50 UTC] No.45111047[source]▶
C8 is a good state if you can get it. Intel is really good at this. They don't even bother energizing the L3 caches immediately when exiting deep package C-states. But there are lots of conditions that will inhibit C8, notably an Ethernet link on a NIC capable of PTP. This is why wireless is better.
3. xioxox ◴[03 Sep 25 08:33 UTC] No.45113492[source]▶
Although Intel processors are efficient, modern AMD processors have much higher idle power usage, due to their chiplet design. They typically use at least 20W more power.