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Questions tagged [cpufreq]

39 questions
4
votes
0 answers

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
  • 140
3
votes
1 answer

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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3
votes
1 answer

CPU frequency got stuck at 798MHz

My system is a Debian Testing, kernel 6.11.4-amd64 in a Lenovo W540. I am running since yesterday a high demand task (to manipulate two large datasets using R) that was going to take 26 hours to complete. At some point at night I decided to move the…
Javi
  • 131
3
votes
0 answers

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
  • 227
2
votes
1 answer

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
  • 190
2
votes
0 answers

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
  • 129
2
votes
2 answers

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
  • 31
2
votes
2 answers

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
  • 21
2
votes
0 answers

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
  • 171
2
votes
2 answers

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
  • 21
2
votes
1 answer

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
  • 298
2
votes
0 answers

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
  • 133
2
votes
1 answer

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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2
votes
1 answer

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
  • 21
2
votes
2 answers

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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