Schedutil Vs Interactive, pegasusq is the 'in' thing with all kernel devs right now, FWIW. EAS assumes that OPPs follow utilization (which is coherent with the behaviour of the schedutil CPUFreq governor, see Section 6. The configuration file for cpupower is located in /etc/default/cpupower. It aims to provide the best balance between performance and power efficiency by aligning frequency changes with actual task scheduling needs. Oct 4, 2012 · The idea of Batch Scheduling is that there will be no change in the schedule during runtime: a process is scheduled to do an operation on data, and it runs until the process is finished. 1 governor初始化流程 除了与具体governor无关的通用结构体cpufreq_governor之外，cpufreq还定义了一个与特定governor相关的结构体dbs_governor，每个governor可以通过该结构体实现其自身的回调函数以及保存其相关的私有数据。 Mar 9, 2024 · 在Linux中，内核的开发者定义了一套框架模型来完成这一目的，它就是 CPUFreq系统。 CPUfreq软件架构如下所示： schedutil governor (Sugov)作为一种内核调频策略模块，它主要是根据当前CPU的利用率进行调频。 Sep 18, 2022 · Therefore, if we want to get the maximum performance, we should use the performance governor. P-State Written by Michael Larabel in Software on 21 May 2016 at 12:11 PM EDT. For multi core devices, hotplug and modified hotplug governors are considered ideal. Jan 6, 2026 · As a result, they both provide dynamic scaling, similar to the schedutil or ondemand generic governors respectively, differing mostly in latency. The performance algorithm should give better power saving functionality than the old ondemand governor for Intel HWP. Cpufreq tip from Rafael Wysocki’s bleeding-edge branch Schedutil patch to use rt-avg for RT instead of fmax OPP dependencies Fixes to interactive gov for tip cpufreq AOSP master as August 22 Feb 9, 2023 · Since 2020 we've seen distributions like Ubuntu Linux switch from using the "ondemand" CPU frequency scaling governor (or "powersave" when using Intel P-State) to now defaulting to the "schedutil" governor that makes use of scheduler utilization data in making CPU frequency scaling decisions. Page 1 of 5. This configuration file is read by a bash script in /usr/lib Aug 2, 2019 · 所以它大部分时间都花在较低的频率上。 这样做的目的是通过良好的性能获得最佳的电池寿命。 schedutil schedutil 是最新版本 Linux 内核（4. schedutil Integrates directly with the Linux kernel scheduler, using real-time task information to make smarter scaling decisions. Used in EAS task placement cfs_rq->avg. schedutil ¶ This governor uses CPU utilization data available from the CPU scheduler. Some Linux distributions may also use another governor called schedutil which should communicate better to the hardware to set the CPU frequency dynamically, but you may want to switch to performance if you want to bypass this. 4 system on Performance mode for ages because it gave clear gaming benefits. Apr 4, 2018 · I'm trying to set the CPU governor to performance in 18. Jan 29, 2026 · 轻松搞定Excel公式错误：SpreadJS让表格开发不再头疼 | 葡萄城技术团队 Oct 29, 2024 · schedutil：是结合了调度器和调频器的方案，基于内核调度决定CPU频率变化。 它在保持性能的同时更高效地节约电量，适合更现代的设备和多线程应用。 每种调速器都有其特定的适用场景，选择时可根据需求侧重性能、节能或手动控制等方面。 Schedutil / DVFS ¶ Every time the scheduler load tracking is updated (task wakeup, task migration, time progression) we call out to schedutil to update the hardware DVFS state. The package is not required to use scaling, but is highly recommended because it provides useful command-line utilities and a systemd service to change the governor at boot. Variants include lulzactive, and interactive. 2k次。本文详细介绍了cpufreq模块的工作原理及各种CPU频率调整模式，包括performance、powersave、userspace、ondemand和conservative，解释了如何通过系统文件手动设置这些模式以优化系统性能或节省电力。 Oct 29, 2024 · schedutil：是结合了调度器和调频器的方案，基于内核调度决定CPU频率变化。 它在保持性能的同时更高效地节约电量，适合更现代的设备和多线程应用。 每种调速器都有其特定的适用场景，选择时可根据需求侧重性能、节能或手动控制等方面。. Ondemand is similar, they're just fluctuating clocks like crazy. Input to the schedutil governor for frequency selection. 19 Comments. In 'interactive' scheduling, a new process could be launched while another process is running, and so time would be allocated for that process as well as the other. Schedutil / DVFS ¶ Every time the scheduler load tracking is updated (task wakeup, task migration, time progression) we call out to schedutil to update the hardware DVFS state. The basis is the CPU runqueue's 'running' metric, which per the above it is the frequency invariant utilization estimate of the CPU. It defines the basic Schedutil / DVFS ¶ 每当调度器的负载跟踪被更新时（任务唤醒、任务迁移、时间流逝），我们都会调用 schedutil来更新硬件DVFS状态。 其基础是CPU运行队列的“运行”指标，根据上面的内容，它是CPU的频率不变的利用率 估计值。 由此我们计算出一个期望的频率，如下: Used in CFS group scheduling se->avg. The basis is the CPU runqueue’s ‘running’ metric, which per the above it is the frequency invariant utilization estimate of the CPU. util_avg - The utilization of an entity. for more details on this topic). It may depend on the hardware, for me it is what it is. Dec 24, 2025 · 文章浏览阅读7. schedutil就是使用这种方式实现调频的。 3. The CPU efficiency and frequency scaling are factored into the running time. 7 CPUFreq Schedutil Testing vs. Mar 8, 2015 · Interactive is the default governor of choice for today's smartphone and tablet manufacturers. The main reason behind stuttering of desktop effects isn't even that schedutil doesn't raise clocks fast enough, it's that it drops them on the floor too soon and doesn't manage to boost them back in time. 7+）中的 EAS 调控器，旨在更好地与 Linux 内核调度程序集成。 它使用内核的调度程序来接收 CPU 利用率信息并根据此输入做出 CPU governor Schedutil now works as well as Performance for the games I've tried I've been running my Ubuntu 2700x / Vega64 / Kernel 5. F is the max requested by OS for any of the (non idle) cores statistically significant intel_pstate/powersave VS intel_cpufreq/schedutil meh statistically significant Jan 29, 2026 · 轻松搞定Excel公式错误：SpreadJS让表格开发不再头疼 | 葡萄城技术团队 CPU Performance Scaling in Linux The Linux kernel supports CPU performance scaling by means of the CPUFreq (CPU Frequency scaling) subsystem that consists of three layers of code: the core, scaling governors and scaling drivers. It generally is regarded as a part of the CPU scheduler, so it can access the scheduler’s internal data structures directly. schedutil still only performs updates at the same rate as the current code, so it doesn't try to address the interactive responsiveness problem, and doesn't try to be clever about realtime or deadline threads. com schedutil Integrates directly with the Linux kernel scheduler, using real-time task information to make smarter scaling decisions. performance. 04, the problem is that it never survives reboots. In batch scheduling the schedule is Jan 6, 2026 · cpupower is a set of userspace utilities designed to assist with CPU frequency scaling. Power Usage – Varies with workload. See full list on askubuntu. Minor differences. Eg. util_avg - Represents the utilization from all runnable and blocked entities. The CPUFreq core provides the common code infrastructure and user space interfaces for all platforms that support CPU performance scaling. Jul 12, 2025 · LagFree, similar to Smartass but based on Conservative rather than Interactive, instantly jumps to a certain CPU frequency after the device wakes, then operates similar to Conservative. Abyssplug and pegasusq. May 13, 2022 · 文章介绍CPU调频策略，涵盖CPUFreq框架、Governor、驱动。提及多种Governor如performance等，分析其调频逻辑。重点阐述基于调度器的schedutil governor，包括调频原理、公式及参数，还提及支持快速切换及Tuning参数。 Apr 6, 2016 · It doesn't change much though. TLDR ondemand is the best, if you're looking for a balance of everything without too much hassle. I've tried following these steps in an answer to this question How to set "Performance& May 21, 2016 · Linux 4. 9: InteractiveX: Description: Created by kernel developer "Imoseyon," the InteractiveX governor is based heavily on the Interactive governor, enhanced with tuned timer parameters to better balance battery vs. 6pdi9, ukeuj, xvhi, iq1pcu, lqvez, n8vzsm, jhv3b7, eibl, wi0vm, h4ozbt,