From mboxrd@z Thu Jan 1 00:00:00 1970 From: dienet Date: Fri, 09 Apr 2010 18:08:18 +0000 Subject: Re: [lm-sensors] Coretemp goes up since 2.6.31.4 Message-Id: List-Id: References: <20100409111733.7bb2b5fa@hyperion.delvare> In-Reply-To: <20100409111733.7bb2b5fa@hyperion.delvare> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: lm-sensors@vger.kernel.org On Fri, 09 Apr 2010 11:17:33 +0200, Jean Delvare wrote: > On Thu, 08 Apr 2010 18:36:34 +0200, dienet wrote: >> I was using 2.6.31.4 for quite some time - it works OK. >> Command 'sensor' that gives me temperature on my C2D, was saying that >> cores have around 28-45 deg (min and maxs on normal day work) >> Now on 2.6.33.1 sensors gives temperatures around 32-48 deg. I never =20 >> seen >> 29 or below. No room temperature is changing (got two kernels installed, >> so I can change it quickly) >> Who is telling the truth here? Was there any works on coretemp module >> since 2.6.31.4 that made the change in read-out? > > There were some changes to the coretemp driver in 2.6.32 and 2.6.33, > but these shouldn't affect older CPU models and would also not change > the readout by a few degrees. You can check if the high temperature > limit is the same - then you can assume the driver changes did not > affect your system. On 2.6.31.4: coretemp-isa-0000 Adapter: ISA adapter Core 0: +33.0=B0C (high =3D +100.0=B0C, crit =3D +100.0=B0C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +33.0=B0C (high =3D +100.0=B0C, crit =3D +100.0=B0C) On 2.6.33.1: coretemp-isa-0000 Adapter: ISA adapter Core 0: +34.0=B0C (high =3D +105.0=B0C, crit =3D +105.0=B0C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +34.0=B0C (high =3D +105.0=B0C, crit =3D +105.0=B0C) So there is a 5 deg diffrance. I did not change any config files. >> I think that because that temp. change fan is working more often. >> >> I'm using Lenovo ThinkPad T61. > > This suggests that the temperature increase is real and this isn't just > a reporting issue. I suggest that you check > in /proc/acpi/processor/*/power, the amount of time spent in C2 and C3 > states. Also install powertop and run it on both kernels, see if 2.6.33 > has more frequent wake-ups than 2.6.31. On 2.6.31.4 powertop says: C3 - 90, 7% of the time P (800MHz) - 98% Wakeups: 627 On 2.6.33.1 powertop says: C3 - 93% of the time P (800MHz) - 98% Wakeups: 556 Was running the same programs. Kernel 2.6.33.1 was running for about 1h. I'm asuming that /proc/acpi/processor/*/power is used by powertop so I'm not paseting it. But it also says that C3 is more often used then others. --=20 pozdr0 dienet "Old C programmers never die. They're just cast into void." ------------------------------------------------------ Porozmawiaj z wrozka! Sprawdz >> http://link.interia.pl/f2661 _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors