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FreeBSD 在高温下节流 cpu 时钟

tag-icon • tag-icon freebsd cpu power-management temperature
FreeBSD 在高温下节流 cpu 时钟

我使用的笔记本电脑的冷却系统很差，所以我的 CPU 有时会达到非常高的温度，Linux 内核能够调节 cpu 时钟来冷却它，正如我在 dmesg 中看到的：

[22612.245243] CPU3: Core temperature above threshold, cpu clock throttled (total events = 617268)
...
[22612.257307] CPU3: Core temperature/speed normal
etc

最近，我安装了 FreeBSD 来玩它，我注意到它始终以全速使用 CPU，即使我设置powerd为-a hiadaptive -b adaptive -i 85 -r 60 -p 100，所以在一些使用后 CPU 温度高于正常值，FreeBSD 只是重新启动而不是节流。我也尝试过使用 C 状态，但没有帮助。

我如何配置它以获得 Linux 行为？

答案1

我遇到了类似的问题，我的防火墙（一台旧笔记本电脑）会由于 CPU 过热而关闭。我使用以下步骤解决了该问题，对 pfSense 防火墙有效：

1）下载FreeBSDcpu速度.sh 文件来自 GitHub，作者：dreamcat4

2）创建文件cpu速度.sh，并通过 pfSense 管理界面，使用 Diagnostics >> Edit File 粘贴上一步中链接的源内容

3) 启用文件执行cpu速度.sh在 fSense 管理界面中，使用 Diagnostics >> Command Prompt 和命令$ chmod +x /[path_to_file]/cpu-speed.sh

4) 通过$ sysctl dev.cpu.0.freq_levels 在命令提示符中运行来检查可用的 CPU 频率

4）运行文件cpu速度.sh[valid_CPU_frq] 使用命令$ cd /[path_to_file] && ./cpu-speed.sh [valid_CPU_frq]

5) 使用命令检查当前（新）CPU 频率$ sysctl dev.cpu.0.freq

6）完成。

我为我的 CPU 选择了可接受的最低 CPU 核心频率，并且能够将我的 CPU 的 CPU 核心温度从 +90 C 永久降低到 < 60 C。

编辑： 为了避免将来出现死链接，请找到 dreamcat4 的代码（如上面链接）的文件cpu速度.sh以下：

#!/bin/sh
#
# cpu-speed:
#   Requirements - be the root user, FreeBSD 9.2 or higher.
# 
#   Get or set the CPU frequency. This command with no arguments will
#   print the current CPU frequency. CPU may be idling at it's lowest speed.
#
#   This command takes 1 optional argument - new MAX cpu freq (in Mhz).
#   expressed as an integer number. e.g. "cpu 800" - set max freq 800 Mhz.
#   This MAX figure is the new max frequency it is allowed to clock up to.
#
#   Number is rounded off to the nearest allowed frequency multiplier.
#

show_all_cpu_sysctl_settings()
{
# Most FreeBSD kernel settings are read-only. Some may look like duplicates.
# Very few are read-write (so we use powerd). Some CPU settings depend on the CPU family.

# This command should reveal all the CPU-related key names:
    sysctl - a | grep - i cpu
}

set_cpu_speed()
{
# To change the max clock, we must restart the "powerd" rc.d service 
# with new cmdline arguments. "man powerd" for more information.
    if ["$(id -u)" = "0"]; then
    if [!"$(grep "cpuspeed" " / etc / rc.conf")"]; then
       echo "" >> "/etc/rc.conf"
      echo "powerd_enable=\"YES\"" >> "/etc/rc.conf"

      # make the cmdline argument to -M flag a txt substitution with the txt file "/etc/cpuspeed"
    echo "powerd_flags=\"-M \$(cat /etc/cpuspeed)\"" >> "/etc/rc.conf"
    fi

    if ["$1"]; then
# write our new cpu speed to the txt file "/etc/cpuspeed"
      echo "$1" > / etc / cpuspeed

# restart powerd daemon to read the new cpu speed
      / etc / rc.d / powerd restart > / dev / null
    fi
  fi


}

print_current_cpu_freq()
{
# Report back the current cpu frequency for core "0"
    sysctl dev.cpu.0.freq
}

show_possible_cpu_speeds()
{
# Show a list of all possible cpu frequency steps for core "0"
    sysctl dev.cpu.0.freq_levels
}

main()
{
    set_cpu_speed "$@";
    sleep 1; # give it a chance to update before we check the new value
  print_current_cpu_freq;
    show_possible_cpu_speeds;
}

# Entry point
main "$@"

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