获取NVIDIA显卡的温度

NVIDIA显卡在硬件上有温度传感器，可以感知显卡的运行环境。温度数据的获取，一般是通过调用NVIDIA的SDK的相关函数即可。SDK的下载的网址（https://developer.nvidia.com/nvapi），里面有一些sample code可以参考。获取温度的函数是NvAPI_GPU_GetThermalSettings。参考代码如下:

int main()
     {
        NvAPI_Status ret = NVAPI_OK;
        ret = NvAPI_Initialize();

        if(ret != NVAPI_OK)
        {
            printf("NvAPI_Initialize() failed = 0x%x", ret);
            return 1; // Initialization failed
        }

        NvPhysicalGpuHandle hPhysicalGpu[NVAPI_MAX_PHYSICAL_GPUS];

        for (NvU32 PhysicalGpuIndex = 0; PhysicalGpuIndex < NVAPI_MAX_PHYSICAL_GPUS; PhysicalGpuIndex++)
        {
            hPhysicalGpu[PhysicalGpuIndex]=0;
        }

         ret = NvAPI_EnumPhysicalGPUs(hPhysicalGpu, &physicalGpuCount);
        if(ret != NVAPI_OK)
        {
            printf("Cannot enumerate GPUs in the system...
");
            getchar();
            exit(1);
        }

        NV_GPU_THERMAL_SETTINGS currentTemp;//获取温度的数据结构
        currentTemp.version = NV_GPU_THERMAL_SETTINGS_VER;//一定要设置，不然调用获取温度函数时候会出错
        for(NvU32 GpuIndex = 0; GpuIndex < physicalGpuCount; GpuIndex++)
        {
            ret = NvAPI_GPU_GetThermalSettings(hPhysicalGpu[PhysicalGpuIndex], NVAPI_THERMAL_TARGET_ALL,¤tTemp);//获取温度
            if(ret == NVAPI_OK)
            {
                printf("current temperature=%d
",currentTemp.sensor[0].currentTemp);
            }

        }

        return 0;
     }