Linux下获取cpu温度

2024-04-04 00:07| 来源: 网络整理| 查看: 265

大致strace跟踪了下sensors命令，发现是读取类似/sys/class/hwmon/hwmon1/temp1_input中的值，再结合google下的如下几篇文章：

https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface

总结如下：

# ls -al /sys/class/hwmon/ total 0 drwxr-xr-x 2 root root 0 Aug 11 10:09 . drwxr-xr-x 64 root root 0 Aug 11 10:09 .. lrwxrwxrwx 1 root root 0 Aug 11 10:09 hwmon0 -> ../../devices/platform/coretemp.0/hwmon/hwmon0 lrwxrwxrwx 1 root root 0 Aug 11 10:09 hwmon1 -> ../../devices/platform/coretemp.1/hwmon/hwmon1 lrwxrwxrwx 1 root root 0 Aug 11 10:09 hwmon2 -> ../../devices/LNXSYSTM:00/device:00/ACPI000D:00/hwmon/hwmon2

可以发现hwmon0目录是cpu0的温度监测，hwmon1是cpu1的温度

注意下，这个对应关系不同机器不一样，同时重启后该对应关系也可能会变化。

再进入目录：

# cat /sys/class/hwmon/hwmon0/temp1_input 33000 # cat /sys/class/hwmon/hwmon0/temp2_input 31000 # sensors coretemp-isa-0000 Adapter: ISA adapter Physical id 0: +33.0°C (high = +87.0°C, crit = +97.0°C) Core 0: +31.0°C (high = +87.0°C, crit = +97.0°C) Core 1: +27.0°C (high = +87.0°C, crit = +97.0°C) Core 2: +28.0°C (high = +87.0°C, crit = +97.0°C) Core 3: +30.0°C (high = +87.0°C, crit = +97.0°C) Core 4: +27.0°C (high = +87.0°C, crit = +97.0°C) Core 8: +30.0°C (high = +87.0°C, crit = +97.0°C) Core 9: +29.0°C (high = +87.0°C, crit = +97.0°C) Core 10: +30.0°C (high = +87.0°C, crit = +97.0°C) Core 11: +28.0°C (high = +87.0°C, crit = +97.0°C) Core 12: +31.0°C (high = +87.0°C, crit = +97.0°C) Core 16: +26.0°C (high = +87.0°C, crit = +97.0°C) Core 17: +29.0°C (high = +87.0°C, crit = +97.0°C) Core 18: +26.0°C (high = +87.0°C, crit = +97.0°C) Core 19: +29.0°C (high = +87.0°C, crit = +97.0°C) Core 20: +31.0°C (high = +87.0°C, crit = +97.0°C) Core 24: +28.0°C (high = +87.0°C, crit = +97.0°C) Core 25: +28.0°C (high = +87.0°C, crit = +97.0°C) Core 26: +28.0°C (high = +87.0°C, crit = +97.0°C) Core 27: +28.0°C (high = +87.0°C, crit = +97.0°C) Core 28: +29.0°C (high = +87.0°C, crit = +97.0°C)

temp1_input对应的是整个cpu的温度

temp1_input对应的是core0，temp2_input对应的是core1，依次类推。

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