不同架构的CPU，CPU温度所在的系统文件有区别
CPU温度相关的系统文件位于
cd /sys/class/thermal
可以看到文件夹下有很多命名为thermal_zone{n}的文件夹
以thermal_zone0文件夹为例
cat /sys/class/thermal/thermal_zone0/type
可以获取到thermal_zone0设备的类型
对x86架构的CPU，type应为x86_pkg_temp；而arm架构的CPU，type为CPU-therm
对thermal_zone0到thermal_zone{n}文件夹遍历，找到对应的文件夹
以thermal_zone0文件夹为例
cat /sys/class/thermal/thermal_zone0/temp
可以获取到当前设备的温度
C++实现
#include <string>
#include <fstream>
#include <iostream>
class CpuMonitor {
public:
double GetTemperature() {
if (cpu_temp_fs_.is_open()) {
std::string buf;
cpu_temp_fs_ >> buf;
cpu_temp_fs_.seekg(0);
try {
double temperature = std::stoi(buf) / 10;
temperature /= 100;
return temperature;
} catch (...) {
}
}
double temperature = -1.0;
for (int i = 0; temperature < 0; ++i) {
temperature = GetTemperature(i);
if (temperature == -2.0) {
return -1.0;
}
}
return temperature;
}
private:
double GetTemperature(int n) {
std::string path = "/sys/class/thermal/thermal_zone" + std::to_string(n);
std::fstream f;
f.open(path + "/type", std::ios::in);
if (!f.good()) {
return -2.0;
}
std::string buf;
f >> buf;
f.seekg(0);
#ifdef __aarch64__
std::string type = "CPU-therm";
#else
std::string type = "x86_pkg_temp";
#endif
if (type != buf) {
return -1.0;
}
cpu_temp_fs_.open(path + "/temp", std::ios::in);
cpu_temp_fs_ >> buf;
cpu_temp_fs_.seekg(0);
try {
double temperature = std::stoi(buf) / 10;
temperature /= 100;
return temperature;
} catch (...) {
}
return -1.0;
}
private:
std::fstream cpu_temp_fs_;
};
int main() {
CpuMonitor m;
std::cout << m.GetTemperature() << "\n";
return 0;
}