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Questions tagged [cpufreq]

37 questions
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Since upgrade from linux 4.6 to (4.7, 4.8), %CPU is always 0; the frequency is unknown

Since the upgrade to linux kernel 4.7 (Debian Stretch), it seems that my system (Aurora-R4 i7 3820) is a bit slower (short hangs sometimes) and the most strange thing is that I can't see anymore the percentages on the CPU cores with top, KSysGuard,…
Skywalker13
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disabling cpu throttling for all CPUs and cores, installing ATLAS

I'm installing ATLAS on a multicore system. It runs Rocks OS, a linux distro specialized for cluster computing. I need to turn CPU throttling off. According to a guide at csrc.tamu-commerce.edu, "$ /usr/bin/cpufreq-selector -g performance" turns…
zr00
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Disabling both intel_pstate and acpi-cpufreq in favour of speedstep-lib

My Haswell CPU uses, by default, intel_pstate to do the frequency scaling. I have been able to disable that in /etc/defaults/grub so that it drops down to acpi-cpufreq driver. However, I want to disable that one too, so that my system will use…
Bram
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How to disable frequency scaling? Intel_pstate

Heyo, I'm trying to disable the frequency scaling of one of my CPU and set the frequency to the maximum I tried using cpupower -c 1 frequency-set -g governor and -d 2600000 or with cpufreq-set but nothing works. I get this:
David 天宇 Wong
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CPU Time and Clocks

I've been given this question: Assume that on some computer the overhead of trapping to the kernel for clock ticks is about 2 microsecond, with the handler requiring another 9 microseconds. Clock ticks typically occur at a frequency of 500Hz. What…
user3068177
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CPU Maximum Frequency stuck at 59%

I have just installed a Windows 7 32-bit on my HP Compaq nx6310 notebook. However, once I boot into Normal Mode, I receive 2 Kernel-Processor-Power Event ID 37 warnings in my event log indicating that the performance of my processor is being limited…
Sam
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cpufreq performance module?

I see no cpufreq performance module: $ ll /lib/modules/2.6.32-358.2.1.el6.x86_64/kernel/drivers/cpufreq/ total 88
-rwxr--r--. 1 root root 20576 Mar 12 18:26 cpufreq_conservative.ko -rwxr--r--. 1 root root 27096 Mar 12 18:26…
Hei
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Dynamic/Static CPU Frequency Scaling

I need to manipulate frequency of each core in my Intel i7 processor. There is a way to do it in Debian with the Linux kernel cpufreq subsystem. It is described in their wiki. However, I want to do it on Fedora and Windows. Any idea if the…
Mohamad Ibrahim
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Underclocking/Power saver mode in Ubuntu 9.10

I'm using a laptop (Intel Pentium Dual T3400, 2GB RAM, Intel GL40 chipset), dual-booting with Windows Vista Home Premium and Ubuntu 9.10. Majority of the time, Windows is used. However, when I have to write some code, I switch to Ubuntu. The problem…
tecfreak
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cpufreq policy acting weird, current policy max gets throttled

I'm using laptop-mode and the ondemand governor. When I do cpufreq-info I get analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 1 CPUs which need to have their frequency coordinated by software: 0 …
tladuke
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How to change cpufreq settings in Kubuntu

I have been using Kubuntu, and I would like to change the cpufreq settings. My understanding is that there is no applet for that, and I would have to do it with a script. So I run a command like this: sudo cpufreq-set -g userspace -c 0 -d 800Mhz…
mrw
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Linux PC randomly halts [instant power off] and doesn't power back on power switch unless AC power is cut

my Linux pc is randomly powering off. the working configuration: ATI drivers (fglrx) not loaded cpufreq governor (either performance or powersave) and frequency are set at boot (default settings compiled into kernel). no suspend-to-RAM (pm-suspend)…
kagali-san
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No throttling of any kind but processor freq sticks at 0.8 Ghz and Power ~ 8W

I have Dell XPS 9650, i7-7700Hq, GTX 1050, 512GB SSD, 16GB DD4, 4K. I find no throttling as in Thermal, Power limit, Current limit, MB VR (from Intel XTU), No Limit reasons from ThrottleStop, No "Yes" flag under any Performance limit reasons in…
ShootingKIng
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How to determine processor frequency scale down to ~200 MHz due to ThermStatus

I am attempting to determine what is causing an embedded industrial computer (ARK-1550-S9A1E) with Intel 4th Gen Core i5-4300U Dual Core to scale down all the cores to around ~200 MHz from 1.90 GHz There is several utilities/tools (turbostat or msr)…
Kris
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Pros & Cons of throttling CPU

So my laptop's CPU has this turbo boost thing, and it heats up the machine to an uncomfortable degree. So I've used cpufrequtils to keep my CPU at only 1.4GHz, and it hasn't felt any slower and it's gotten cooler. Though I've noticed now, the…
Some Dinosaur
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