> (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > On Mon, 5 Jan 2009 03:22:43 -0800 (PST) > bugme-daemon at bugzilla.kernel.org wrote: > > > http://bugzilla.kernel.org/show_bug.cgi?id=12362 > > > > Summary: Extremely high cpu usage and temps starting 2.6.25 > > Product: Platform Specific/Hardware > > Version: 2.5 > > KernelVersion: 2.6.28 > > Platform: All > > OS/Version: Linux > > Tree: Mainline > > Status: NEW > > Severity: normal > > Priority: P1 > > Component: x86-64 > > AssignedTo: platform_x86_64 at kernel-bugs.osdl.org > > ReportedBy: curaga at operamail.com > > > > > > Latest working kernel version: 2.6.24 > > Earliest failing kernel version: 2.6.25 > > (regression) > > > Distribution: None > > Hardware Environment: X86_64 > > Software Environment: pure 64-bit software > > Problem Description: Starting with 2.6.25, my CPU temperatures > > are reported as > > 55C when idle (30C in 2.6.24). Load avg stays over 0.5 even when completely > > idle, and mpg123 takes 38% of cpu when it took 3% in 2.6.24 (from top). > > > > While the temperature readings of coretemp might be wrong in all kernels, > > afterall .24 claims using undocumented features and .25-.28 claim to use a > > relative scale, the cpu usage of all processes has greatly increased starting > > with .25 kernel. > > > > I have tried various configs with .25, .26, and .28, both > > identical with my .24 > > config and variations such as enabling tickless, hpet, and using different IO > > schedulers etc. No matter the config, all kernels starting .25 show this huge > > cpu usage in all processes. > > > > I'm not at all sure what causes this, so marking as platform-specific. > > > > Pentium Dual Core E2160 overclocked to 3Ghz > > > > Steps to reproduce: Boot a 64-bit kernel 2.6.25 or later > > > > So I take it that you beleive that this regression was added into > drivers/hwmon/coretemp.c during 2.6.25 development? > > If so, possible culprits would be: > > > commit 561d9a969455cb009bb15b63e1d925dc527e7a9d > Author: Rafael J. Wysocki <rjw at sisk.pl> > Date: Mon Dec 3 18:01:50 2007 +0100 > > HWMON: coretemp, suspend fix > > commit 6369a2887a1b35fde91573adc650528e3efea8e9 > Author: Rudolf Marek <r.marek at assembler.cz> > Date: Fri Jan 18 00:42:54 2008 +0100 > > hwmon: (coretemp) Add maximum cooling temperature readout > > commit 118a88718886a6cb7fb2cf7fb77ef2eea30c73a1 > Author: Rudolf Marek <r.marek at assembler.cz> > Date: Sun Feb 17 22:59:39 2008 +0100 > > hwmon: (coretemp) Add TjMax detection for mobile CPUs > > commit ae770152c801f10a91e5e86597a39b5f9ccf2d0d > Author: Rudolf Marek <r.marek at assembler.cz> > Date: Fri Jan 18 00:50:04 2008 +0100 > > hwmon: (coretemp) Add Penryn CPU to coretemp > > commit 34c86c1e622ec77ba81c01969003bbc8e15156f3 > Author: Darrick J. Wong <djwong at us.ibm.com> > Date: Fri Aug 15 00:40:41 2008 -0700 > > coretemp: recognize Nehalem CPUs > > > None of which look very likely :( Hello Sorry, I'm not sure if this is one regression or two. Either there is something that keeps my cpu a lot warmer, either by itself or by causing all processes to take more cpu, or there is that, and the temperature is read wrong. I took a look at the kernelnewbies changelog for .25, but nothing jumped at me as possible causes for either of the symptoms. I'm afraid doing a git bisect would be way beyond my skills. Also, the huge cpu-usage was at it's worst in .25, it is smaller in .28 but still there (the 38% is from .28, I think it was over 50% in .25) - Lauri -- _______________________________________________ Surf the Web in a faster, safer and easier way: Download Opera 9 at http://www.opera.com Powered by Outblaze
