Date: Tue, 9 Aug 2016 17:23:45 +0300 From: Aleksander Alekseev <afiskon@devzen.ru> To: freebsd-questions@freebsd.org Subject: Power consumption tuning Message-ID: <20160809172345.312117ac@e733>
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Hello. I'm exploring how power consumption could be tuned on FreeBSD 11.0. I discovered a few useful articles, for instance [1]. Also useful pieces of advice were given on IRC. Resulting list is for now like this: * Use lightweight software (i3, GTK based GUI applications, etc), turn off unused kernel modules, don't use full disc encryption, etc * Reduce CPU frequency (sysctl dev.cpu.0.freq), use powerd to do it automatically * Reduce display brightness (sudo pkg install intel-backlight) * Enable power save mode on NIC (sudo ifconfig wlan0 powersave) * Disable unused USB devices (sudo usbconfig -d X.Y power_off) * Reduce clock frequency (kern.hz = 100) * Make sure your kernel is built without INVARIANTS and WITNESS Perhaps there are other methods I didn't notice? For instance are there any other sysctl parameters or kernel configuration options worth trying? [1] https://wiki.freebsd.org/TuningPowerConsumption -- Best regards, Aleksander Alekseev
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