用NVAPI获取GPU信息

Posted 2022-03-04 csfreebird

通过nvapi可以获得GPU的温度和性能参数。主页在这里：https://developer.nvidia.com/nvapi

我的代码基础是来自互联网，不过略加变化。首先是获取物理GPU，然后是获取温度，最后是获取GPU性能。另外，获取GPU性能不需要自己通过offset从dll中导出函数。

#include "stdafx.h"
#include "R313-developer/nvapi.h"


int _tmain(int argc, _TCHAR* argv[])

    NvAPI_Status ret = NVAPI_OK;
    int i=0;

    NvDisplayHandle hDisplay_a[NVAPI_MAX_PHYSICAL_GPUS*2] = 0;

    ret = NvAPI_Initialize();

    if (!ret == NVAPI_OK)
        NvAPI_ShortString str;
        NvAPI_GetErrorMessage(ret, str);
        printf("NVAPI NvAPI_Initialize: %s\\n", str);
		return 1;
    

    NvAPI_ShortString ver;

    NvAPI_GetInterfaceVersionString(ver);
    printf("NVAPI Version: %s\\n", ver);

    NvU32 cnt;

    NvPhysicalGpuHandle phys;

    ret = NvAPI_EnumPhysicalGPUs(&phys, &cnt);

    if (!ret == NVAPI_OK)
        NvAPI_ShortString string;
        NvAPI_GetErrorMessage(ret, string);
        printf("NVAPI NvAPI_EnumPhysicalGPUs: %s\\n", string);
		return 1;
    

    NvAPI_ShortString name;

    NV_GPU_THERMAL_SETTINGS thermal;

    ret = NvAPI_GPU_GetFullName(phys, name);
    if (!ret == NVAPI_OK)
        NvAPI_ShortString string;
        NvAPI_GetErrorMessage(ret, string);
        printf("NVAPI NvAPI_GPU_GetFullName: %s\\n", string);
		return 1;
    

    printf("Name: %s\\n", name);
    thermal.version = NV_GPU_THERMAL_SETTINGS_VER;
    ret = NvAPI_GPU_GetThermalSettings(phys,0, &thermal);

    if (!ret == NVAPI_OK)
        NvAPI_ShortString string;
        NvAPI_GetErrorMessage(ret, string);
        printf("NVAPI NvAPI_GPU_GetThermalSettings: %s\\n", string);
		return 1;
    
	
	printf("Temp: %u C\\n", static_cast<unsigned>(thermal.sensor[0].currentTemp));

	NV_GPU_DYNAMIC_PSTATES_INFO_EX infoEx;
	infoEx.version = NV_GPU_DYNAMIC_PSTATES_INFO_EX_VER;
	ret = NvAPI_GPU_GetDynamicPstatesInfoEx(phys, &infoEx);

	if (!ret == NVAPI_OK) 
        NvAPI_ShortString string;
        NvAPI_GetErrorMessage(ret, string);
        printf("NVAPI NvAPI_GPU_GetDynamicPstatesInfoEx: %s\\n", string);
		return 1;
	

	//printf("Physical GPU utilization%s", infoEx.utilization[0].);	
    return 0;