From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carlos Garcia Campos Subject: RE: cpufreq stops working after a while Date: Tue, 15 Aug 2006 19:46:37 +0200 Message-ID: <1155664002.12437.11.camel@localhost.localdomain> References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1742887139==" 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: "Pallipadi, Venkatesh" Cc: cpufreq@lists.linux.org.uk --===============1742887139== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-Fq9kumDfkXoh9rwrcPWa" --=-Fq9kumDfkXoh9rwrcPWa Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable El mar, 15-08-2006 a las 08:23 -0700, Pallipadi, Venkatesh escribi=C3=B3: > =20 > >-----Original Message----- > >From: Carlos Garcia Campos [mailto:carlosgc@gnome.org]=20 > >Sent: Tuesday, August 15, 2006 8:08 AM > >To: Pallipadi, Venkatesh > >Cc: cpufreq@lists.linux.org.uk > >Subject: RE: cpufreq stops working after a while > > > >El mar, 15-08-2006 a las 06:27 -0700, Pallipadi, Venkatesh escribi=C3=B3= : > >> =20 > >> >-----Original Message----- > >> >From: cpufreq-bounces@lists.linux.org.uk=20 > >> >[mailto:cpufreq-bounces@lists.linux.org.uk] On Behalf Of=20 > >> >Carlos Garcia Campos > >> >Sent: Tuesday, August 15, 2006 4:07 AM > >> >To: cpufreq@lists.linux.org.uk > >> >Subject: Re: cpufreq stops working after a while > >> > > >> > > >> >I have the same problem. My laptop is Dell Latitude D600 (Intel(R) > >> >Pentium(R) M processor 1.60GHz). If I'm compiling something, for > >> >example, that takes a long time, scaling_max_freq is set to=20 > >600000 (the > >> >lowest). If I try to echo 1600000 to scaling_max_freq it do nothing. > >> >Only after some time if the cpu load is not high I can=20 > >echoing 1600000 > >> >again and it works without need to reboot.=20 > >> > > >>=20 > >> Looks like you have the same problem that Mark had in this=20 > >original thread. Thermal. > > > >It never happened with older kernels (< 2.6.17, I think) > > >=20 > Can you confirm the latest version of the kernel where the problem was no= t there. That will help on narrowing this down. I'm not sure at all . . . I don't have any kernel < 2.6.17 compiled right now. > >> It is not a bug in cpufreq. Just that due to cpu load,=20 > >system is getting heated up and platform decides to reduce the=20 > >temperature using passive cooling and as a result reduces the=20 > >frequency. Does your system have active cooling (fans) or does=20 > >it allow only passive cooling? You can monitor the temperature=20 > >by looking at stuff under /proc/acpi/termal_zone/*/*. > > > >Yes, my system has fans. Here is the contents of the files > >under /proc/acpi/termal_zone/*/*, if it helps: > > > >$ cat /proc/acpi/thermal_zone/THM/* > > > >cooling mode: critical > > > >state: ok > >temperature: 47 C > >critical (S5): 102 C > > > >How can I solve the problem then? It's very annoying.=20 >=20 >=20 > Can you watch the temperature as you see the frequency drop. Continuously= (every second) cat cpufreq_max_freq in /sys and temperature in /proc as yo= u run you load. My feeling is you will see the drop in max freq as your tem= perature goes to around 60 degrees or so. Here are the results: ................ 1600000 - 85 C 1600000 - 84 C 1600000 - 85 C 1600000 - 76 C 600000 - 76 C 600000 - 71 C 600000 - 70 C 600000 - 69 C ................ It changed at 76 C. >=20 > Thanks, > Venki >=20 --=20 Carlos Garcia Campos (KaL) elkalmail@yahoo.es carlosgc@gnome.org http://carlosgc.linups.org PGP key: http://pgp.mit.edu:11371/pks/lookup?op=3Dget&search=3D0x523E6462 --=-Fq9kumDfkXoh9rwrcPWa Content-Type: application/pgp-signature; name=signature.asc Content-Description: Esta parte del mensaje =?ISO-8859-1?Q?est=E1?= firmada digitalmente -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (GNU/Linux) iD8DBQBE4gh8jxBOalI+ZGIRAr1vAJ4oqx1es5o6DeZ2vveJV/Bs+se2tACeOHyy jp00zLNMfp9FKRuD3nfBa6E= =OYdj -----END PGP SIGNATURE----- --=-Fq9kumDfkXoh9rwrcPWa-- --===============1742887139== 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 --===============1742887139==--