Running on 800 mHz, even though 2 cores are on 100%

Running on ondemand cpufreq governor with 800 Mhz, even though 2 cores are on 100% load. What could be the problem?
/proc/cpuinfo shows 1000 Mhz for 2 cores (out of 4) and cpupower somehow shows only 800 Mhz for all of them.
Last edited by ernetas (2012-12-08 14:41:38)

hunterthomson wrote:
Well, to be clear if the cpufreq daemon process is running it uses the ondemand governor by default and makes a best guess on the freq's. BUT, yes okay you had the problem before it was installed.
Well, as for reporting it... I guess you could but you would need to be able to reproduce the problem. I can't see how the kernel could be at fault though, provided you are not running any daemons like cpufreq, Intel i5 CPU's do all the frequency scaling all on there own. I don't know for sure, but I would not even think that ACPI has anything to do with it. I would think that it is all done in the CPU microcode and BIOS.
The main thing is that it is working now. Keep an eye on it with i7z and post again if the problem comes back.
cpufreq is integrated into kernel and it runs even without cpufreq package with a default governor "ondemand", which you can control via /sys and /proc, just like anything else that comes from kernel. Turbo Boost only works when it needs more than nominal frequency and the temperature allows overclocking and yes, it is done by the CPU microcode and BIOS. As for SpeedStep, it is a technology which... "allow the clock speed of the processor to be dynamically changed (to different P-states) by software" (from Wikipedia), so it has nothing to do with my case as turning it off would lead to nominal frequency of 2.4 GHz.
As for ACPI, I agree - it should not have anything to do with that. Or at least I hope so, because using an ACPI-based battery monitor causes trouble: i. e. touchpad may sometimes stop working (and this is a known bug in the Arch community - it's not just my hardware).

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