Volkan YAZICI wrote: > Hi, > > On Sun, 29 Jun 2008, Hakan BAYINDIR <[EMAIL PROTECTED]> writes: > >> I'm running debian testing on a Intel Core2Quad Q6600 CPU with 4 >> gigabytes of RAM for 7 months. Until 2.6.22, the kernel was scaling each >> of my cores independently of each other but starting with 2.6.22, every >> core is running in the same frequency. While this doesn't pose any >> stability or performance issues, causes higher temprature and noise when >> I run a single threaded computing intensive job. >> >> I tracked the cause a bit. I was able to dig upto >> "/sys/devices/system/cpu/cpuX/cpufreq/affected_cpus". This file says >> which CPUs should scale together. Since file is read only even to root I >> think it's an unconfigurable option. I also found that cpu frequencies >> are adjusted by cpufreq_acpi module and I cannot find any configuration >> related to it files in my system (with my current knowledge). >> >> The weird thing is I'm running an exact clone of this system in my >> office with a core2duo system which scales its cores independently. I >> cloned my home system to the office when I was running an Athlon64, >> approximately 1.5 years ago. >> >> If anybody can say what is wrong, is it the expected behavior, where >> should I look further, or whom I can talk to? >> >> BTW, I'm running 2.6.24-1-686-bigmem kernel prepackaged from debian testing. >> > > Did you solve your problem? I may recommend you to read files under > linux/Documentation/cpu-freq directory. BTW, sending your > /proc/config.gz might be helpful. > > > Regards. > > Hi,
I was unable to solve my problem so, I got the source of the kernel I'm using from Debian with apt-source. The cpu_freq dcoumentation doesn't show affected_cpus in the interface so it's unconfigurable as I guessed. So I found cpu-freq mailing list from the docs and I think I'll continue digging from there. But first, I'll try with an ubuntu live CD to verify behavior. Cheers and Regards, --Hakan. P.S. I cannot send a config.gz since the kernel is prepackaged.
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