Questions tagged [cpu-frequency]
Use this tag for questions about how to detect and/or set the clock speed of cpu cores of Unix or Linux systems, automatic frequency scaling and adapting core voltages according to the core frequency.
162 questions
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Probing Hardware for Sensor Data with High Frequency (Temperature and CPU clock frequency)
I'm trying to learn how to probe my CPU sensor data. I need at most 1 to 2 ms sampling period. Using hwmon this could be possible for the temperature data.
But so far I only discovered the CPUfreq ...
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IRQ Latency and CPU Use
I am running a system with RT-Preempt kernel v6.4.8-rt8
CPU is 12th Gen Intel(R) Core(TM) i7-12800HE
This system is receiving data through the CAN Bus. Every 1 millisecond a burst of 3 messages is ...
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sysfs missing CPU thermal_throttle information
Background Information:
I'm running Ubuntu 24.04.1 LTS (Noble Numbat, kernel 6.8.0-51-generic) on an AMD Ryzen 9 7950X3D, and I'm investigating some odd behavior where the CPU governor/driver will ...
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Discrepency of cpu MHz via bash and conky
Edit:
The original question of this post was regarding the "average" cpu MHz as obtained via conky builtins and the command line. A further question was regarding temperatures as reported by ...
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CPU systematically scaled down
Following an upgrade (or a reboot) on a Debian testing, I noticed that my system was much slower than usual. The CPUs seem to be systematically scaled down.
I used cpupower to ensure that the ...
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Limit CPU usage by temperature over time gradient
As CPU clock can be limited by thermal thesholds (implemented by CPU vendor firmware / controller or in Linux by /sys/devices/virtual/thermal/cooling_device* devices), is it also possible to limit by ...
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What is the meaning of columns in the table displayed by cpupower-monitor?
Running sudo cpupower monitor on Ubuntu 24.04 I'm getting:
| Nehalem || Mperf || RAPL || Idle_Stats
CPU| C3 | C6 | PC3 | PC6 || C0 | Cx | ...
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What does hwp_dynamic_boost do in the intel_pstate frequency scaling driver?
Looking at the intel_pstate kernel documentation, apparently hwp_dynamic_boost should dynamically increase performance when a task waiting on IO is selected to run.
Enabling this feature will not ...
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Why are my benchmark times not repeatable, even for a CPU-bound task?
I'm running some benchmarks on my Linux desktop/laptop computer, but I'm not getting reliable results. I'm running a CPU-intensive task that does negligible I/O and doesn't use much RAM. My computer ...
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Avoiding the need for reboots when CPU thermally throttles itself
I'm on a Dell laptop with Sandy Bridge Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz CPU
running a 5.15.0-100-generic Linux kernel.
The CPU goes up to 3.4GHz (as both the MATE CPU Frequency Monitor ...
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Laggy PC with Kernel 6.5 and AMD 5500U Lucienne
I am currently facing a problem with my Lenovo E15 laptop (AMD Ryzen 5500u "Lucienne" processor) and the kernel 6.5. (Xubuntu 22.04)
Maybe three weeks ago,
I noticed that my computer was ...
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Cannot set CPU to maximum speed
I am trying to set all my CPUs to the maximum GHz capability. But for some reason even though the CPU is capable of 5.76GHz, when I set it to performance it only get's to 4.2GHz.
Looking at the ...
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Gather CPU utilisation or different workloads
I am trying to figure out for different workloads (CPU intensive, high DB IOPs etc), which compute series of cloud VM would be ideal.
In order to do that I need to be able to get the CPU utilisation. ...
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What is the intended way to set `cpupower` on boot?
Running cpupower frequency-set -g powersave is a one-shot. I could think of a number of ways to make this happen on boot (rc.local, systemd one-shot, etc)...
Question: Is there a "correct" ...
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Why CPU Freq Crosses Hardware Limits and Policy Limits, and System Heat Up after Hybrid Sleep, in Debian 12 (Testing-Weekly)?
In Debian 12 (bookworm: testing-weekly):
Installed auto-cpufreq and thermald, with auto-cpufreq.conf while on charger:
governor = performance
scaling_max_freq = 1900000
turbo = auto
Thought ...
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