问一下 r5 3900x 的 最低频率是不是 2200mhz - V2EX
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morgan1freeman
V2EX    Linux

问一下 r5 3900x 的 最低频率是不是 2200mhz

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  •   morgan1freeman Jan 17, 2024 2001 views
    This topic created in 851 days ago, the information mentioned may be changed or developed.

    analyzing CPU 23: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 23 CPUs which need to have their frequency coordinated by software: 23 maximum transition latency: 4294.55 ms. hardware limits: 2.20 GHz - 4.67 GHz available frequency steps: 3.80 GHz, 2.80 GHz, 2.20 GHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil current policy: frequency should be within 2.20 GHz and 3.80 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 3.80 GHz (asserted by call to hardware). cpufreq stats: 3.80 GHz:16.73%, 2.80 GHz:4.52%, 2.20 GHz:78.75% (1114)

    5 replies    2024-01-18 08:49:46 +08:00
    nightwitch
        1
    nightwitch  
       Jan 17, 2024
    cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq

    直接看数值
    s04
        2
    s04  
       Jan 17, 2024
    morgan1freeman
        4
    morgan1freeman  
    OP
       Jan 18, 2024
    @greenskinmonster 多谢,已经用上了,之前 pve 待机太耗电了,所以想省点电,安装后确实能跑 550MHz 了,真的很好奇为啥,这个都进内核这么久了,还默认用 acpi_cpufreq ,估计 AMD 也压根没想兼容 ACPI
    morgan1freeman
        5
    morgan1freeman  
    OP
       Jan 18, 2024
    PVE 上 尝试了很多次,最终这个配置成功了, 修改 grub linux 默认启动参数 加上
    initcall_blacklist=acpi_cpufreq_init amd_pstate.shared_mem=1 amd_pstate=passive

    每次修改 boot 后记得 update-initramfs -k all -u && update-grub
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