Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [cpu-frequency]

The tag has no usage guidance.

3
votes
2answers
10k views

CentOS 7 cpupower not setting the CPU's to maximum

On my machine, i have power savings disable on the BIOS. When I run Ubuntu on this machine, the CPU's are running maximum at 2100 MHz. However, when I'm running CentOS 7, even with the scaling ...
1
vote
2answers
380 views

cpupower and libcpupower

cpupower fails sometime to execute with this error : cpupower: error while loading shared libraries: libcpupower.so.0: cannot open shared object file: No such file or directory I've compiled and ...
3
votes
1answer
1k views

Scaling issues of i7 3520M with intel_pstate module on Kernel 3.10.0

Few days ago I updated my openSUSE 12.3 system from Kernel 3.9.8-1.gf3348a8-desktop to 3.10.0-1.g3dcd746-desktop and since then, turbo mode of my i7 3520M is enabled by default and it does not ...
3
votes
1answer
798 views

cpufreqd does not control temperature plus shows no output

Since my laptop (an Acer Aspire 5750G running a Gentoo Linux with a not-quite-up-to-date kernel 2.6.39-r3 (a weird wLan hardware makes the update difficult)) tends to run rather hot I am trying to ...
2
votes
1answer
5k views

RHEL 7 Still CPU Frequency Scaling

When machine is imaged with: RHEL6.x CPU speeds report full 3.3Ghz speed for all CPUs cpupowerutils is not installed RHEL7.x CPU speeds vary (shown in example below) cpupowerutils is installed I ...
1
vote
1answer
933 views

Cpupower doesn't work reliably

Since my previous question on this topic, I upgraded my kernel a few times and I ran into another problem: cpupower doesn't seem to show and set the cpu frequency in a reliable way. First, some ...
0
votes
1answer
628 views

Kali Linux Live (Try before installation) won't install GRUB or LILO

I want to install Kali Linux but the original installation makes my PC hot. I use cpufreq-selector -f 1000000 to cool down my PC, but when I use the live option, GRUB or LILO won't install. Do I have ...
0
votes
1answer
3k views

Indicator-cpufreq doesn't start on login

If I run indicator-cpufreq in the console it will start up just like it is supposed to and appear in the panel. However, if I place the same command in the startup programs it doesn't appear on ...
3
votes
0answers
108 views

Suspend system instead of shutdown on CPU overheat

I have Linux Mint. The system Linux Mint is installed on, shuts down immediately on overheating. Is there anyway the system doesn't shutdown, but goes to standby state? The machine can always be ...
3
votes
0answers
305 views

CPU frequency goes back after scaling down by indicator-cpufreq, suspension and waking up

I scale down the CPU frequency by indicator-cpufreq on Ubuntu 12.04. After I suspend Ubuntu and wake it up, the CPU goes back to"on demand" (the default). I wonder if there is a way to keep the CPU ...
2
votes
0answers
103 views

cpupower frequency-set does not work

So I have this Dual Intel Silver 4116 CPU server that will set the MHz to 132 randomly, the server becomes unusable after that point. Even reboots don't restore the MHz, only driving to the data ...
2
votes
0answers
60 views

Unresponsive system with powersave governor on Thinkpad X1 Carbon

Using a Thinkpad X1 Carbon 2018 (6th Gen) on Ubuntu 18.10 with kernel 4.18 I notice that the system feels unresponsive even in AC mode. It's most noticable in Firefox (but not restricted to it) ...
2
votes
0answers
837 views

Limited cpupower policy scaling

How do I change the cpufreq policy range? $ cpupower frequency-info analyzing CPU 0: driver: powernow-k8 CPUs which run at the same hardware frequency: 0 1 CPUs which need to have their ...
2
votes
0answers
68 views

Assign virtual core number to specific real core

Is there any way to assign ''linux core numbers'' to specific real cores? I'm working with an asymmetric architecture, so not all cores are the same, and I want to assign specific cores number to ...
2
votes
0answers
2k views

indicator-cpufreq in arch linux

I'm an Ubuntu user testing out Arch Linux. So far I'm happy. On Ubuntu I used the indicator-cpufreq applet to control power profile both on Unity and Gnome-shell. On Arch, I cannot figure out how ...
2
votes
0answers
1k views

Disable CPU scaling with U 1404

I know there are a lot of things about this topic but I couldn't find anything not older than 4 years. As the stuff develops so fast I hope it is fine to ask again a few years later. What is ...
2
votes
0answers
2k views

Intel Core i3/i5/i7 Sandy Bridge CPU throttling

Intel Sandy-Bridge family i5 Core CPU, running Linux kernel 3.2 (Debian Squeeze/Wheezy), under heavy computation load, does not react to to cpufreq-set -g powersave (using acpi_cpufreq module). It is ...
1
vote
0answers
26 views

Which reasons may cause low MHz of CPU

My system is Ubuntu 16.04.3. I installed it just now and executed some processes on it. I found that many processes used more than 100% CPUs. However, when I executed lscpu | grep MHz, I got the ...
1
vote
0answers
603 views

How to disable cpu frequency scaling in Centos 7

I have tried all the suggestions here How to disable CPU frequency scaling in CentOS 6? However, the frequency still changes up and down. Even for CPUs I have isolated which are idle. $ grep "cpu ...
1
vote
0answers
487 views

Intel Pstate frequency limits are overridden

Problem : Run all core on minimum CPU frequency on Intel pstate driver on ubuntu 14. cpupower frequency-set --governor performance --max 1300MHz I am trying to run my cpu cores on different ...
1
vote
0answers
187 views

Scale down to a specific frequency on Ubuntu Linux 14 w/ Intel CPU

I am trying to scale down one of the CPU frequencies. I am using Ubuntu 14 and Linux kernel 4.4. I want to scale down the cpu3 frequency to 1.2 CONSTANT (no throttle). Things I have tried: I want ...
1
vote
0answers
217 views

Do Linux cpufreq governers temporarily change sysfs's scaling_max_freq?

The linux documentation of the variable sysfs scaling_max_freq reports Maximum frequency the CPUs belonging to this policy are allowed to be running at (in kHz). This attribute is read-...
1
vote
0answers
922 views

Hardware Frequency Steps - Intel P-State vs ACPI CPUFREQ

I have Intel Xeon Phi 7210 running CentOS 7 with kernel 3.10.0-514.el7.x86_64. I am comparing what frequency steps are available when I boot system into intel p-state vs when the system uses acpi ...
1
vote
0answers
423 views

Put system in low power mode when idle

I'm trying to build a media player at home using an Odroid XU4 that runs Kodi, which should be always on. However, considering I will not be using it a lot of the time, I would want to put it in a low ...
1
vote
0answers
287 views

Process scheduling and core allocation on big.LITTLE CPUs

Recent ARM chips, like the Qualcomm Snapdragon 810, seem to be using a hybrid architecture called "big.LITTLE" with cores of different architectures and speeds combined into one CPU. On a Linux (or ...
1
vote
0answers
220 views

CPU always at 80°C while the system is idle

My system is quite unused at the moment: %Cpu(s): 10.3 us, 3.1 sy, 0.0 ni, 85.9 id, 0.7 wa, 0.0 hi, 0.0 si, 0.0 s but still the temps sensors give me are quite high: acpitz-virtual-0 Adapter: ...
1
vote
0answers
358 views

how to set or know scaling driver in linux kernel

I am trying to modify the scheduler/governor. For the same I need to know what CPUFreq Driver or scalling driver am I configured to run. 1.Where can I find what scaling driver am I configured to run?...
1
vote
0answers
1k views

Is it safe to disable Frequency Scaling and CPU idle Power Management support for Real Time purposes?

I'm using a Raspberry Pi board and I would like to build a real time system. During the kernel configuration, I found the CONFIG_CPU_FREQ option, which (from the help section) allows you to change ...
1
vote
0answers
347 views

Changing CPU frequency programmatically

I have seen that standard CPU Frequency driver(comes with default package with linux kernel) can change the CPU frequency at runtime, when being used under the supervision of "Ondemand" governor. ...
1
vote
0answers
946 views

How do you run CPU at turbo speed continuously

processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz stepping : 3 cpu MHz : 3299.670 ...
0
votes
0answers
50 views

no or unknown cpufreq driver is active after disabling intel_pstate driver

After disabling intel_pstate driver I get the following error: cpupower frequency-info analyzing CPU 0: no or unknown cpufreq driver is active on this CPU CPUs which run at the same hardware ...
0
votes
0answers
36 views

Command cpupower does not impact CPU frequency

I am trying to fix the frequency of all the cores to some constant value, with no success. Settings Computer with 2 Intel Xeon Gold 6130 CPU, with 16 cores each Kernel 4.9.0-8-amd64 Intel p-state ...
0
votes
0answers
21 views

Check if the cpu clock speed has historically changed in RHEL6

I have a RHEL6 server running on a vmware-esxi host but no access to the host or vCenter. I need to determine if the hosting provider is using power saving features one such way is to check if CPU ...
0
votes
0answers
2 views

Moving from Phenom II to A6 APU - frequency does not reduce in Ondemand

Due to a hardware failure I had to move the Linux system from the Phenom II where the frequency stayed at 800 Mhz and scaled up when necessary, to an A6 APU system, where the frequency always stays at ...
0
votes
0answers
187 views

How to permanently set CPU governor without `cpufrequtils`?

Hardware: Dell Inspiron 15 Gaming 7577, model number 7577-92774. System: I am on Linux Mint 19.1; based on Ubuntu 18.04. Processor: I have an Intel Kaby Lake CPU: Intel Core i7-7700HQ. I have read ...
0
votes
0answers
214 views

Turn on cpu boost state

Is it possible to set boost cpu frequency on laptop (there is no any cpu settings in bios available)? If I try set such "boost frequency" it successed, but frequency setting to maximum frequency in ...
0
votes
0answers
118 views

Powersave CPU frequency governor does not keep frequency low? Is this normal?

I have configured my system to use the powersave governor for CPU frequency, in order to increase battery life. However, even after setting it up and verifying that it is active, my cpu frequency is ...
0
votes
0answers
382 views

CPU load and power management (frequency)

question background In my understanding the load value (shown e.g. by top) allows (together with the knowledge how many CPU cores the system has) a very quick assessment which share of the ...