В Thu, 05 Apr 2012 13:15:35 +0300 Volodymyr Kostyrko <c.kw...@gmail.com> пишет:
> Любомир Григоров wrote: > > Hello all, I am using FreeBSD 9.0-STABLE with Konstantin's patch > > from March 22nd. Everything else is stock. However, after heavy > > load, or compiling, C-states go to C1 as lowest. I think once they > > pass the threshold, they don't go back. > > > > ThinkPad X220 > > i5 2520M with integrated Intel video > > > > In /etc/sysctl.conf > > dev.cpu.0.cx_lowest=C3 > > dev.cpu.1.cx_lowest=C3 > > dev.cpu.2.cx_lowest=C3 > > dev.cpu.0.cx_lowest=C3 > > > > In /etc/rc.conf > > powerd_enable="YES" > > powerd_flags="-a hiadaptive -b adaptive -i 85 -r 60 -p 100" > > > > However, once the cores go to C1, they stay there forever, unless I > > manually set them all back. > > > > Any idea on this? > > > > Have you checked http://wiki.freebsd.org/TuningPowerConsumption? > > 1. For CX states to function correctly you better disable throttling > and powerd. I also witnessed at least one machine that hitting any CX > mode stops generate interrupts on APIC clock (I had to boot it with a > mousee until I disabled APIC clocks). > > 2. You don't need to set each processor CX value, you only need to > set: > > hw.acpi.cpu.cx_lowest=C3 > > All cpu's will inherit default profile. > First need to see what state the processor supports the current system sysctl -a | grep cx_ _______________________________________________ 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"
