From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarod Wilson Subject: Re: Intel Clovertown vs. frequency scaling Date: Thu, 11 Oct 2007 11:37:32 -0400 Message-ID: <470E433C.30401@redhat.com> References: <20071011150633.GL6058@cern.ch> <470E404C.10304@redhat.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1350990170==" Return-path: In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk To: cpufreq@lists.linux.org.uk This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============1350990170== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig0ECE06272A453C200DDBF9C0" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig0ECE06272A453C200DDBF9C0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Stephen J. Gowdy wrote: > I have a quad-core version that uses the centrino one (E5345). However,= > it only has two available speeds, 2GHz and 2.33GHz. Do you get more > options? >=20 > [pcphuat27] ~ > cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver= > centrino > [pcphuat27] ~ > cat > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies > 2333000 2000000 Not a heck of a lot more, but a bit more. [jwilson@xeus ~]$ cat sys/devices/system/cpu/cpu0/cpufreq/scaling_driver acpi-cpufreq [jwilson@xeus ~]$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 2660000 2128000 1596000 FYI, unless I'm mistaken, the speedstep-centrino driver is supposed to be getting deprecated in favor of acpi-cpufreq. > Andras.Horvath@cern.ch wrote: >> I have a number of Clovertown (intel quadcore) machines and, even with= >> the latest 2.6.23, it seems to me that frequency scaling is not >> supported (e.g. the /sys/devices/system/cpu/cpu0/cpufreq/* stuff does >> not appear even though CONFIG_X86_SPEEDSTEP_CENTRINO is "y"). >=20 > I believe you want acpi-cpufreq, not speedstep-centrino. Works just fin= e > for my quad-core systems, anyhow. If that doesn't work, its probably th= e > bios at fault. --=20 Jarod Wilson jwilson@redhat.com --------------enig0ECE06272A453C200DDBF9C0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFHDkM8tO+bni+75QMRAqlZAJ96UAeROrR8qvH7qJz6xZwFI5DvfwCfaeDN 5ZRc2E3HbMFjcd1WOZVSGds= =eeZS -----END PGP SIGNATURE----- --------------enig0ECE06272A453C200DDBF9C0-- --===============1350990170== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Cpufreq mailing list Cpufreq@lists.linux.org.uk http://lists.linux.org.uk/mailman/listinfo/cpufreq --===============1350990170==--