From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hakan BAYINDIR Subject: Q6600 CPU Frequency Scaling Problem / Bug Date: Mon, 30 Jun 2008 22:50:50 +0300 Message-ID: <4869391A.9010006@bayindir.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0414072118==" Return-path: 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) --===============0414072118== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig4A591DAF5B8CBC441F388D0E" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig4A591DAF5B8CBC441F388D0E Content-Type: multipart/mixed; boundary="------------090202020404020609050409" This is a multi-part message in MIME format. --------------090202020404020609050409 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, I'm running Debian testing on an Intel Core2Quad Q6600 with 4GB DDR2 RAM on a MSI P35 Platinum board since December 07. When I first migrated my system on December (I've installed Debian as etch beta1 and upgrading since), every core of the CPU was scaling their frequency independently. After installing 2.6.22, The cores started to scale in a synchronized way. I.e. when a core needs to speed-up, every core speeds up in sync. The weird thing is, I have another clone of this OS at my office running on a core 2 duo processor and that system scaled its processors independently. The ganged scaling behavior is also consistent with the /sys/devices/system/cpuX/cpufreq/affected_cpus file and cpufreq-info command. Both of them shows that all CPU's speeds are need to be in sync while there's really no need. Also Ubuntu 8.04 Live CD exhibits the same behavior and this behavior can be verified under sysfs again. Is it a bug? Is it expected? I can provide more information if it's needed. I'm attaching cpufreq-info's output as a reference. Cheers and Regards, -- Hakan. --------------090202020404020609050409 Content-Type: text/plain; name="cpufreq-info.out.txt" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="cpufreq-info.out.txt" Y3B1ZnJlcXV0aWxzIDAwMjogY3B1ZnJlcS1pbmZvIChDKSBEb21pbmlrIEJyb2Rvd3NraSAy MDA0LTIwMDYKUmVwb3J0IGVycm9ycyBhbmQgYnVncyB0byBsaW51eEBicm9kby5kZSwgcGxl YXNlLgphbmFseXppbmcgQ1BVIDA6CiAgZHJpdmVyOiBhY3BpLWNwdWZyZXEKICBDUFVzIHdo aWNoIG5lZWQgdG8gc3dpdGNoIGZyZXF1ZW5jeSBhdCB0aGUgc2FtZSB0aW1lOiAwIDEgMiAz CiAgaGFyZHdhcmUgbGltaXRzOiAxLjYwIEdIeiAtIDIuNDAgR0h6CiAgYXZhaWxhYmxlIGZy ZXF1ZW5jeSBzdGVwczogMi40MCBHSHosIDIuMTQgR0h6LCAxLjg3IEdIeiwgMS42MCBHSHoK ICBhdmFpbGFibGUgY3B1ZnJlcSBnb3Zlcm5vcnM6IHVzZXJzcGFjZSwgcG93ZXJzYXZlLCBv bmRlbWFuZCwgY29uc2VydmF0aXZlLCBwZXJmb3JtYW5jZQogIGN1cnJlbnQgcG9saWN5OiBm cmVxdWVuY3kgc2hvdWxkIGJlIHdpdGhpbiAxLjYwIEdIeiBhbmQgMi40MCBHSHouCiAgICAg ICAgICAgICAgICAgIFRoZSBnb3Zlcm5vciAib25kZW1hbmQiIG1heSBkZWNpZGUgd2hpY2gg c3BlZWQgdG8gdXNlCiAgICAgICAgICAgICAgICAgIHdpdGhpbiB0aGlzIHJhbmdlLgogIGN1 cnJlbnQgQ1BVIGZyZXF1ZW5jeSBpcyAxLjYwIEdIei4KYW5hbHl6aW5nIENQVSAxOgogIGRy aXZlcjogYWNwaS1jcHVmcmVxCiAgQ1BVcyB3aGljaCBuZWVkIHRvIHN3aXRjaCBmcmVxdWVu Y3kgYXQgdGhlIHNhbWUgdGltZTogMCAxIDIgMwogIGhhcmR3YXJlIGxpbWl0czogMS42MCBH SHogLSAyLjQwIEdIegogIGF2YWlsYWJsZSBmcmVxdWVuY3kgc3RlcHM6IDIuNDAgR0h6LCAy LjE0IEdIeiwgMS44NyBHSHosIDEuNjAgR0h6CiAgYXZhaWxhYmxlIGNwdWZyZXEgZ292ZXJu b3JzOiB1c2Vyc3BhY2UsIHBvd2Vyc2F2ZSwgb25kZW1hbmQsIGNvbnNlcnZhdGl2ZSwgcGVy Zm9ybWFuY2UKICBjdXJyZW50IHBvbGljeTogZnJlcXVlbmN5IHNob3VsZCBiZSB3aXRoaW4g MS42MCBHSHogYW5kIDIuNDAgR0h6LgogICAgICAgICAgICAgICAgICBUaGUgZ292ZXJub3Ig Im9uZGVtYW5kIiBtYXkgZGVjaWRlIHdoaWNoIHNwZWVkIHRvIHVzZQogICAgICAgICAgICAg ICAgICB3aXRoaW4gdGhpcyByYW5nZS4KICBjdXJyZW50IENQVSBmcmVxdWVuY3kgaXMgMS42 MCBHSHouCmFuYWx5emluZyBDUFUgMjoKICBkcml2ZXI6IGFjcGktY3B1ZnJlcQogIENQVXMg d2hpY2ggbmVlZCB0byBzd2l0Y2ggZnJlcXVlbmN5IGF0IHRoZSBzYW1lIHRpbWU6IDAgMSAy IDMKICBoYXJkd2FyZSBsaW1pdHM6IDEuNjAgR0h6IC0gMi40MCBHSHoKICBhdmFpbGFibGUg ZnJlcXVlbmN5IHN0ZXBzOiAyLjQwIEdIeiwgMi4xNCBHSHosIDEuODcgR0h6LCAxLjYwIEdI egogIGF2YWlsYWJsZSBjcHVmcmVxIGdvdmVybm9yczogdXNlcnNwYWNlLCBwb3dlcnNhdmUs IG9uZGVtYW5kLCBjb25zZXJ2YXRpdmUsIHBlcmZvcm1hbmNlCiAgY3VycmVudCBwb2xpY3k6 IGZyZXF1ZW5jeSBzaG91bGQgYmUgd2l0aGluIDEuNjAgR0h6IGFuZCAyLjQwIEdIei4KICAg ICAgICAgICAgICAgICAgVGhlIGdvdmVybm9yICJvbmRlbWFuZCIgbWF5IGRlY2lkZSB3aGlj aCBzcGVlZCB0byB1c2UKICAgICAgICAgICAgICAgICAgd2l0aGluIHRoaXMgcmFuZ2UuCiAg Y3VycmVudCBDUFUgZnJlcXVlbmN5IGlzIDEuNjAgR0h6LgphbmFseXppbmcgQ1BVIDM6CiAg ZHJpdmVyOiBhY3BpLWNwdWZyZXEKICBDUFVzIHdoaWNoIG5lZWQgdG8gc3dpdGNoIGZyZXF1 ZW5jeSBhdCB0aGUgc2FtZSB0aW1lOiAwIDEgMiAzCiAgaGFyZHdhcmUgbGltaXRzOiAxLjYw IEdIeiAtIDIuNDAgR0h6CiAgYXZhaWxhYmxlIGZyZXF1ZW5jeSBzdGVwczogMi40MCBHSHos IDIuMTQgR0h6LCAxLjg3IEdIeiwgMS42MCBHSHoKICBhdmFpbGFibGUgY3B1ZnJlcSBnb3Zl cm5vcnM6IHVzZXJzcGFjZSwgcG93ZXJzYXZlLCBvbmRlbWFuZCwgY29uc2VydmF0aXZlLCBw ZXJmb3JtYW5jZQogIGN1cnJlbnQgcG9saWN5OiBmcmVxdWVuY3kgc2hvdWxkIGJlIHdpdGhp biAxLjYwIEdIeiBhbmQgMi40MCBHSHouCiAgICAgICAgICAgICAgICAgIFRoZSBnb3Zlcm5v ciAib25kZW1hbmQiIG1heSBkZWNpZGUgd2hpY2ggc3BlZWQgdG8gdXNlCiAgICAgICAgICAg ICAgICAgIHdpdGhpbiB0aGlzIHJhbmdlLgogIGN1cnJlbnQgQ1BVIGZyZXF1ZW5jeSBpcyAx LjYwIEdIei4K --------------090202020404020609050409-- --------------enig4A591DAF5B8CBC441F388D0E Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIaTkajzSH49UjSJwRAjXBAJ4k0UUC7uPwmlnmj5oDksyfaoEePwCggNga dJ3bbxogH+6wHf+XjOZGgEc= =VBMP -----END PGP SIGNATURE----- --------------enig4A591DAF5B8CBC441F388D0E-- --===============0414072118== 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 --===============0414072118==--