> >If you are trying to reduce power consumption, why are you limiting Cx >states to C2 (which save little) and not C3 (which will save a LOT of >power when the CPU is not heavily loaded).
On my previous post I forgot to set kern.hz=100. This change does lower idle power from 71w to 62w. With my hardware, i5-650, using C3 does not result in lower power consumption versus C2. Both states draw exactly the same power. hw.acpi.cpu.cx_lowest: C3 dev.cpu.0.cx_supported: C1/3 C2/205 C3/245 dev.cpu.0.cx_lowest: C3 dev.cpu.1.cx_supported: C1/3 C2/205 C3/245 dev.cpu.1.cx_lowest: C3 dev.cpu.2.cx_supported: C1/3 C2/205 C3/245 dev.cpu.2.cx_lowest: C3 dev.cpu.3.cx_supported: C1/3 C2/205 C3/245 dev.cpu.3.cx_lowest: C3 62w idle power hw.acpi.cpu.cx_lowest: C2 dev.cpu.0.cx_supported: C1/3 C2/205 C3/245 dev.cpu.0.cx_lowest: C2 dev.cpu.1.cx_supported: C1/3 C2/205 C3/245 dev.cpu.1.cx_lowest: C2 dev.cpu.2.cx_supported: C1/3 C2/205 C3/245 dev.cpu.2.cx_lowest: C2 dev.cpu.3.cx_supported: C1/3 C2/205 C3/245 dev.cpu.3.cx_lowest: C2 62w idle power John Theus TheUs Group TheUsGroup.com _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"