Date: Thu, 18 Nov 2004 10:52:05 +0200 From: Ruslan Ermilov <ru@freebsd.org> To: rejden <rejden@hysteria.sk> Cc: freebsd-acpi@freebsd.org Subject: Re: acpi cpu throttling Message-ID: <20041118085205.GC72018@ip.net.ua> In-Reply-To: <20041118003601.GA8873@hysteria.sk> References: <20041118003601.GA8873@hysteria.sk>
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--MnLPg7ZWsaic7Fhd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Nov 18, 2004 at 01:36:01AM +0100, rejden wrote: > Hi, > is there any way how to change CPU frequency with ACPI ? > i saw something similar under linux, googling whole night and nothin... > i'm running generic 5.3release kernel >=20 > jan >=20 > ----- >=20 > daemon# sysctl -a |grep cpu > kern.threads.virtual_cpu: 1 > kern.ccpu: 1948 > kern.smp.maxcpus: 1 > kern.smp.cpus: 1 > hw.ncpu: 1 > hw.acpi.cpu.throttle_max: 8 > hw.acpi.cpu.throttle_state: 8 > hw.acpi.cpu.cx_supported: C1/1 C2/2 C3/185 > hw.acpi.cpu.cx_lowest: C3 > hw.acpi.cpu.cx_usage: 0.08% 99.91% 0.00% > machdep.cpu_idle_hlt: 1 > dev.cpu.0.%desc: ACPI CPU (3 Cx states) > dev.cpu.0.%driver: cpu > dev.cpu.0.%location: handle=3D\_PR_.CPU0 > dev.cpu.0.%pnpinfo: _HID=3Dnone _UID=3D0 > dev.cpu.0.%parent: acpi0 >=20 > daemon# dmesg -a |grep cpu > cpu0: <ACPI CPU (3 Cx states)> on acpi0 > acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0% > hw.acpi.cpu.cx_lowest:=20 > hw.acpi.cpu.throttle_state:=20 >=20 Yes, go read acpi(4) manpage when it talks about SYSCTLS. You want hw.acpi.cpu.throttle_state. Cheers, --=20 Ruslan Ermilov ru@FreeBSD.org FreeBSD committer --MnLPg7ZWsaic7Fhd Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFBnGK1qRfpzJluFF4RAoLTAKCTeCP9nkWvcFTigulG1ZcLR59cYACffSam BQGXo1Qw5IsrXEfFXtb0Cdo= =pAyg -----END PGP SIGNATURE----- --MnLPg7ZWsaic7Fhd--
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