Date: Mon, 12 Jul 2021 14:01:34 -0700 From: "Thomas D. Dean" <tomdean@wavecable.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: How do I disable CPU throttling Message-ID: <4d1e32fc-3e77-626e-138b-6af872445c5e@wavecable.com> In-Reply-To: <CAFbbPuhuWdzjfH2e7RSwiUa2UORAoJE_-yQeqyoMz7gTMjfxTA@mail.gmail.com> References: <f982b8fd-0ec0-24a9-8272-4da3bd5d19c4@wavecable.com> <0be4883a-6bf6-28bc-a14b-9cb1f6d729ae@wavecable.com> <CAFbbPuhuWdzjfH2e7RSwiUa2UORAoJE_-yQeqyoMz7gTMjfxTA@mail.gmail.com>
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On 7/12/21 1:12 PM, Paul Procacci wrote: > sysctl's get set generally in /etc/sysctl.conf > > dev.cpu.0.freq_levels <-- This format is called a mib in the native > parlance. > sysctl.conf(5) and sysctl(8) go into much further detail. > > ~Paul > grep -Rail freq_levels /etc/* shows the source of freq_levels I believe this is hardwired somewhere. Maybe read from the cpu? BIOS? > > On Mon, Jul 12, 2021 at 3:55 PM Thomas D. Dean <tomdean@wavecable.com > <mailto:tomdean@wavecable.com>> wrote: > > On 7/12/21 3:48 AM, Thomas D. Dean 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@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? > > > where does dev.cpu.0.freq_levels get set at boot time? > > > sysctl -n dev.cpu.0.freq_levels > 3700/4070 2800/2800 2200/1980 > > Looks like this is hardwired somewhere. > > I searched src/sys/* and found nothing, unless I missed it. grep'd > freq_levels, 3700, 4070 > _______________________________________________ > freebsd-questions@freebsd.org <mailto:freebsd-questions@freebsd.org> > mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>; > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org > <mailto:freebsd-questions-unsubscribe@freebsd.org>" > > > > -- > __________________ > > :(){ :|:& };:
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