Cuda獲取GPU負載百分比

Question

我想計算GPU負載。如何獲得cuda的GPU負載百分比？

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Answer 1

http://eliang.blogspot.com.by/2011/05/getting-nvidia-gpu-usage-in-c.html?m=1

// 
// Getting Nvidia GPU Usage 
// 
// Reference: Open Hardware Monitor (http://code.google.com/p/open-hardware-monitor) 
// 

#include <windows.h> 
#include <iostream> 

// magic numbers, do not change them 
#define NVAPI_MAX_PHYSICAL_GPUS 64 
#define NVAPI_MAX_USAGES_PER_GPU 34 

// function pointer types 
typedef int *(*NvAPI_QueryInterface_t)(unsigned int offset); 
typedef int (*NvAPI_Initialize_t)(); 
typedef int (*NvAPI_EnumPhysicalGPUs_t)(int **handles, int *count); 
typedef int (*NvAPI_GPU_GetUsages_t)(int *handle, unsigned int *usages); 

int main() 
{ 
    HMODULE hmod = LoadLibraryA("nvapi.dll"); 
    if (hmod == NULL) 
    { 
     std::cerr << "Couldn't find nvapi.dll" << std::endl; 
     return 1; 
    } 

    // nvapi.dll internal function pointers 
    NvAPI_QueryInterface_t  NvAPI_QueryInterface  = NULL; 
    NvAPI_Initialize_t   NvAPI_Initialize   = NULL; 
    NvAPI_EnumPhysicalGPUs_t NvAPI_EnumPhysicalGPUs = NULL; 
    NvAPI_GPU_GetUsages_t  NvAPI_GPU_GetUsages  = NULL; 

    // nvapi_QueryInterface is a function used to retrieve other internal functions in nvapi.dll 
    NvAPI_QueryInterface = (NvAPI_QueryInterface_t) GetProcAddress(hmod, "nvapi_QueryInterface"); 

    // some useful internal functions that aren't exported by nvapi.dll 
    NvAPI_Initialize = (NvAPI_Initialize_t) (*NvAPI_QueryInterface)(0x0150E828); 
    NvAPI_EnumPhysicalGPUs = (NvAPI_EnumPhysicalGPUs_t) (*NvAPI_QueryInterface)(0xE5AC921F); 
    NvAPI_GPU_GetUsages = (NvAPI_GPU_GetUsages_t) (*NvAPI_QueryInterface)(0x189A1FDF); 

    if (NvAPI_Initialize == NULL || NvAPI_EnumPhysicalGPUs == NULL || 
     NvAPI_EnumPhysicalGPUs == NULL || NvAPI_GPU_GetUsages == NULL) 
    { 
     std::cerr << "Couldn't get functions in nvapi.dll" << std::endl; 
     return 2; 
    } 

    // initialize NvAPI library, call it once before calling any other NvAPI functions 
    (*NvAPI_Initialize)(); 

    int   gpuCount = 0; 
    int   *gpuHandles[NVAPI_MAX_PHYSICAL_GPUS] = { NULL }; 
    unsigned int gpuUsages[NVAPI_MAX_USAGES_PER_GPU] = { 0 }; 

    // gpuUsages[0] must be this value, otherwise NvAPI_GPU_GetUsages won't work 
    gpuUsages[0] = (NVAPI_MAX_USAGES_PER_GPU * 4) | 0x10000; 

    (*NvAPI_EnumPhysicalGPUs)(gpuHandles, &gpuCount); 

    // print GPU usage every second 
    for (int i = 0; i < 100; i++) 
    { 
     (*NvAPI_GPU_GetUsages)(gpuHandles[0], gpuUsages); 
     int usage = gpuUsages[3]; 
     std::cout << "GPU Usage: " << usage << std::endl; 
     Sleep(1000); 
    } 

    return 0; 
}