On Tue, Jul 24, 2012 at 9:57 AM, Sepherosa Ziehau <sepher...@gmail.com> wrote: > On Tue, Jul 24, 2012 at 3:24 AM, Sven Gaerner <sgaer...@gmx.net> wrote: >> On Mon, Jul 23, 2012 at 09:44:06AM +0800, Sepherosa Ziehau wrote: >>> On Mon, Jul 23, 2012 at 3:27 AM, Sascha Wildner <s...@online.de> wrote: >>> > On Sun, 22 Jul 2012 21:16:54 +0200, Sven Gaerner <sgaer...@gmx.net> wrote: >>> > >>> >> On Sun, Jul 22, 2012 at 08:31:41PM +0200, Sascha Wildner wrote: >>> >>> >>> >>> On Sun, 22 Jul 2012 13:46:41 +0200, Sven Gaerner <sgaer...@gmx.net> >>> >>> wrote: >>> >>> >>> >>> >[...] >>> >>> Hmm, disabling UEFI is OK, but make sure that you have enabled EST in >>> BIOS (something probably read like "enhanced speed step" or something >>> like "P-state"). >> There is no such option. And the only UEFI option is to enable booting >> of an UEFI compliant OS. Speed stepping cannot be configured. The BIOS >> options are very limited. >> >>> Besides CPU P-State, you could also set allowable CPU C-State to C3 by >>> setting sysctl hw.acpi.cpu.cx_lowest and put tunable >>> hw.i8254.intr_disable="0" in /boot/loader.conf (you need to reboot >>> after changing /boot/loader.conf). However, it should be noted that >>> enabling C3 will disable LAPIC timer and i8254 timer will be used >>> instead, which may cause extra overhead. >> This seems not to change anything. The temperature remains the same. And >> setting hw.acpi.cpu.cx_lowest returns with "Invalid Argument". > > I mean following steps: > 1) Add the following line into into /boot/loader.conf, then reboot: > hw.i8254.intr_disable="0" > 2) sysctl hw.acpi.cpu.cx_lowest=C3
I mean do step1) first, then do step 2) after step1)'s reboot. i8254 is intentionally disabled by default, so some mobo w/o it could boot properly. Best Regards, sephe > > Best Regards, > sephe > > -- > Tomorrow Will Never Die -- Tomorrow Will Never Die
