March 29, 20206 yr Hello, I have been playing around with unraid (6.8.3) now for a while, but I am still unsure if I have set it correctly or missing something. My home server is running: 4770k, 16GB ram, HDD x6 (all except one are spinned down most of the time), SSD for cache, USB boot. (It is pretty much old PC, not the best for power efficiancy) Server runs: binhex-qbittorrentvpn, plex, resilo-sync. That is it, no VM, no other dockers. I have installed Fix Common Problems (none) and Tips and Tweaks plugins. In Tips and Tweaks plugins I have set CPU Scaling Governor to Power Save (I have only power save, performance and scheduled, no other). Driver in use is Intel Pstate. Now to the problem, it does not scale down while system is idle. Bowser: Sun Mar 29 16:25:41 2020 Every 2.0s: grep "cpu MHz" /proc/cpuinfo cpu MHz : 2300.501 cpu MHz : 2676.811 cpu MHz : 2223.091 cpu MHz : 1856.778 cpu MHz : 2221.020 cpu MHz : 2075.670 cpu MHz : 2433.324 cpu MHz : 1833.564 Overall Load is 1% to 4% on idle (35 C temp), but the frequency does not seem to drop. Shouldn't it go down to 800 Mhz (I believe that was what I could get on Windows). Am I missing something? PS: I did limit cpu ratio in Bios to 2.7 to not blast at 3.5 or more. Edited March 29, 20206 yr by Farfenkugell
March 29, 20206 yr I think you need to turn on Intel Speedstep in the BIOS but it is disabled if you manually tune your CPU, including underclocking.
March 29, 20206 yr Author 37 minutes ago, testdasi said: I think you need to turn on Intel Speedstep in the BIOS but it is disabled if you manually tune your CPU, including underclocking. It was set to Auto, put now it to Enabled. Plus C3 State to Enabled from Auto. Booted server, made sure there are no activity in htop or docker usage. Still jumping between 1.1 up to 3.3Ghz. Enabled other C states, disabled turbo boost, set core ratio to 2.7, it still is blasting up to 3.5Ghz, confused... Edited March 29, 20206 yr by Farfenkugell
March 29, 20206 yr Author Disabling intel_pstate driver and fallbacking to acpi-cpufreq seems did the trick, on power saving mode it is now stuck at 800 Mhz. Will need to play around more with other CPU Scaling Governors, but for my needs, it seems so far working. You can disable the Intel-Pstate driver by editing /boot/syslinux/syslinux.cfg and adding a intel_pstate=disable: ... label unRAID OS menu default kernel /bzimage append intel_pstate=disable initrd=/bzroot ... With conservative or even on deman it works just fine now. Edited March 29, 20206 yr by Farfenkugell
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