How do I disable CPU throttling

[Paul Procacci]

Please look for performance_cpu_freq in the rc.conf manpage.

~Paul

On Mon, Jul 12, 2021 at 6:48 AM Thomas D. Dean <tomdean at wavecable.com>
wrote:

> I want to run this system at a fixed freq.  It has beefed-up cooling.
>
> How do I do this?
>
>  > uname -a
> FreeBSD aorus 13.0-RELEASE FreeBSD 13.0-RELEASE #0:
>     Sat Jul 10 23:47:01 PDT 2021
>     tomdean at aorus:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64
>
>  From dmidecode:
>   MB: Gigabyte TRX40 AORUS XTREME
>   CPU: AMD Ryzen Threadripper 3970X
>     Max Speed: 4550 MHz
>     Current Speed: 3700 MHz
>
> # sysctl dev.cpu | grep freq
> dev.cpu.0.freq_levels: 3700/4070 2800/2800 2200/1980
> dev.cpu.0.freq: 2200
>
> #sysctl dev.cpu.0.freq=3700
> dev.cpu.0.freq: 2200 -> 3700
>
> === wait 30 sec
>
> # sysctl dev.cpu.0.freq
> dev.cpu.0.freq: 2200
>
> Why does dmidecode (via cpu-x) report a different value than
>    sysctl dev.cpu.0.freq?
>
> Tom Dean
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