Ubuntu 20.04正在耗尽戴尔XPS上的电池- CPU核心空闲状态，不缩放频率。
Ubuntu 20.04正在耗尽戴尔XPS上的电池- CPU核心空闲状态，不缩放频率。
提问于 2022-07-08 06:24:28
我运行的Ubuntu20.04最新更新的戴尔XPS 9510和电池性能真的很差。使用轻量(仅在简单网站上浏览网页)，我的电池寿命最高可达1小时30，而在Windows下，笔记本电脑可以轻松达到8小时。差别很大。
我检查了许多设置，并安装了TLP以提高电池寿命，但没有发生重大变化，但我观察到一种奇怪的行为，可能会解释这种高耗电量。当磁芯处于空闲状态时，当磁芯在负载下适当地缩放时，频率回到标称速度(2，5 the )，而不是最小速度(800 the )。
以下是一些输出：
$ sudo tlp-stat -p
--- TLP 1.3.1 --------------------------------------------
+++ Processor
CPU model = 11th Gen Intel(R) Core(TM) i9-11900H @ 2.50GHz
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu1/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu10/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu10/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu10/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu10/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu10/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu10/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu10/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu11/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu11/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu11/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu11/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu11/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu11/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu11/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu12/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu12/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu12/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu12/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu12/cpufreq/scaling_max_freq = 4900000 [kHz]
/sys/devices/system/cpu/cpu12/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu12/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu13/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu13/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu13/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu13/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu13/cpufreq/scaling_max_freq = 4900000 [kHz]
/sys/devices/system/cpu/cpu13/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu13/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu14/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu14/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu14/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu14/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu14/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu14/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu14/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu15/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu15/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu15/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu15/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu15/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu15/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu15/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu2/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu2/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu2/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu3/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu3/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu3/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu4/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu4/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu4/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 4900000 [kHz]
/sys/devices/system/cpu/cpu4/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu4/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu5/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu5/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu5/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 4900000 [kHz]
/sys/devices/system/cpu/cpu5/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu5/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu6/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu6/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu6/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu6/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu6/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu6/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu6/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu7/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu7/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu7/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu7/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu7/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu8/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu8/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu8/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu8/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu8/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu8/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu8/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/cpu9/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu9/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu9/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu9/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu9/cpufreq/scaling_max_freq = 4800000 [kHz]
/sys/devices/system/cpu/cpu9/cpufreq/energy_performance_preference = balance_power [HWP.EPP]
/sys/devices/system/cpu/cpu9/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power
/sys/devices/system/cpu/intel_pstate/min_perf_pct = 16 [%]
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 100 [%]
/sys/devices/system/cpu/intel_pstate/no_turbo = 0
/sys/devices/system/cpu/intel_pstate/turbo_pct = 57 [%]
/sys/devices/system/cpu/intel_pstate/num_pstates = 41
/sys/module/workqueue/parameters/power_efficient = Y
/proc/sys/kernel/nmi_watchdog = 0
$paste <(ls /sys/devices/system/cpu/cpu0/cpufreq) <(cat /sys/devices/system/cpu/cpu0/cpufreq/*) | column -s \t' -t
affected_cpus 0
base_frequency 2500000
cpuinfo_max_freq 4800000
cpuinfo_min_freq 800000
cpuinfo_transition_latency 0
energy_performance_available_preferences default performance balance_performance balance_power power
energy_performance_preference balance_power
related_cpus 0
scaling_available_governors performance powersave
scaling_cur_freq 1103306
scaling_driver intel_pstate
scaling_governor powersave
scaling_max_freq 4800000
scaling_min_freq 800000
scaling_setspeed
$cat /proc/cpuinfo | grep "^[c]pu MHz"
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 1070.651
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 1102.344
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000回答 1
Ask Ubuntu用户
回答已采纳
发布于 2022-07-08 15:08:38
当一个CPU空闲时，命令cat /proc/cpuinfo | grep "^[c]pu MHz"列出2500.000，这仅仅是一个默认的基频打印，因为实际的CPU频率信息已经过时，并且内核不想仅仅为了确定其工作频率而唤醒休眠的CPU。
您可以转而查看/sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq：
doug@s19:~$ uname -a
Linux s19 5.13.0-52-generic #59~20.04.1-Ubuntu SMP Thu Jun 16 21:21:28 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
doug@s19:~$ grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:800217
/sys/devices/system/cpu/cpu10/cpufreq/scaling_cur_freq:800279
/sys/devices/system/cpu/cpu11/cpufreq/scaling_cur_freq:800000
/sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq:800004
/sys/devices/system/cpu/cpu2/cpufreq/scaling_cur_freq:800193
/sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq:800290
/sys/devices/system/cpu/cpu4/cpufreq/scaling_cur_freq:800143
/sys/devices/system/cpu/cpu5/cpufreq/scaling_cur_freq:801221
/sys/devices/system/cpu/cpu6/cpufreq/scaling_cur_freq:800419
/sys/devices/system/cpu/cpu7/cpufreq/scaling_cur_freq:800160
/sys/devices/system/cpu/cpu8/cpufreq/scaling_cur_freq:800362
/sys/devices/system/cpu/cpu9/cpufreq/scaling_cur_freq:800214但是，它的响应将与内核5.19的/proc/cpuinfo相同：
doug@s19:~$ uname -a
Linux s19 5.19.0-rc5-stock #1072 SMP PREEMPT_DYNAMIC Mon Jul 4 07:58:15 PDT 2022 x86_64 x86_64 x86_64 GNU/Linux
doug@s19:~$ grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu10/cpufreq/scaling_cur_freq:799988
/sys/devices/system/cpu/cpu11/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu2/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq:800528
/sys/devices/system/cpu/cpu4/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu5/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu6/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu7/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu8/cpufreq/scaling_cur_freq:4100000
/sys/devices/system/cpu/cpu9/cpufreq/scaling_cur_freq:4100000尽管如此，CPU频率并不是调查能源消耗的方法。通常，但并非总是如此，较高的CPU频率使任务能够更快地完成，从而导致更多的时间处于深度空闲状态，从而减少能源消耗。推荐给大多数英特尔处理器使用的工具(在过去十年内)，以及最近一些AMD先驱的电源监控工具是turbostat (我认为linux通用软件包)。示例：
doug@s19:~$ sudo turbostat --Summary --quiet --show Busy%,Bzy_MHz,IRQ,PkgWatt,PkgTmp,RAMWatt,GFXWatt,CorWatt --interval 15
Busy% Bzy_MHz IRQ PkgTmp PkgWatt CorWatt GFXWatt RAMWatt
0.01 1328 425 34 1.42 0.76 0.00 0.89
0.01 800 269 34 1.39 0.73 0.00 0.89 <<< system idle
0.01 800 291 34 1.38 0.72 0.00 0.89
0.01 800 331 34 1.37 0.70 0.00 0.89
81.14 4530 37381 68 110.03 109.37 0.00 0.89
99.05 4513 45191 67 130.44 129.78 0.00 0.89 <<< Big load
99.62 4482 45166 68 124.91 124.25 0.00 0.89 <<< Power limit throttling
99.60 4478 45209 71 124.91 124.25 0.00 0.89
99.58 4473 45171 72 124.92 124.25 0.00 0.89
37.66 4470 17655 43 48.26 47.60 0.00 0.89
0.01 800 315 42 1.52 0.86 0.00 0.89 <<< system idle
0.01 800 316 42 1.50 0.84 0.00 0.89
0.01 800 257 41 1.68 1.02 0.00 0.89页面原文内容由Ask Ubuntu提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://askubuntu.com/questions/1417731
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号