Perfkit error with Dynamic Link Library (.so)

Hi, I am tring to use perfkit in TX1 to monitor hardware performance counter, I put the following file in a library.

main.cu
libNvPmApi.Core.so
NvPmApi.h
NvPmApi.interfaceManager.Linux.h
NvPmApi.Manager.h

the following is the code,which in mian.cu

#include <stdio.h>
#define NVPM_INITGUID
#include "NvPmApi.Manager.h"
#define S_OK 0x00000000
static NvPmApiManager S_NVPMManager;
extern NvPmApiManager *GetNvPmApiManager(){return &S_NVPMManager;}
const NvPmApi *GetNvPmApi(){return S_NVPMManager.Api();}


__global__
void saxpy(int n, float a, float *x, float *y)
{
  int i = blockIdx.x*blockDim.x + threadIdx.x;
  if (i < n) y[i] = a*x[i] + y[i];
}

int main(void)
{

if(GetNvPmApiManager()->Construct(/home/ubuntu/Desktop/cuda_example/libNvPmApi.Core.so) != S_OK)
{
return false; // This is an error condition
}
NVPMRESULT nvResult;
if((nvResult = GetNvPmApi()->Init()) != NVPM_OK)
{
return false; // This is an error condition
}


  int N = 1<<20;
  float *x, *y, *d_x, *d_y;
  x = (float*)malloc(N*sizeof(float));
  y = (float*)malloc(N*sizeof(float));

  cudaMalloc(&d_x, N*sizeof(float)); 
  cudaMalloc(&d_y, N*sizeof(float));

  for (int i = 0; i < N; i++) {
    x[i] = 1.0f;
    y[i] = 2.0f;
  }

  cudaMemcpy(d_x, x, N*sizeof(float), cudaMemcpyHostToDevice);
  cudaMemcpy(d_y, y, N*sizeof(float), cudaMemcpyHostToDevice);

  // Perform SAXPY on 1M elements
  saxpy<<<(N+255)/256, 256>>>(N, 2.0f, d_x, d_y);

  cudaMemcpy(y, d_y, N*sizeof(float), cudaMemcpyDeviceToHost);

  float maxError = 0.0f;
  for (int i = 0; i < N; i++)
    maxError = max(maxError, abs(y[i]-4.0f));
  printf("Max error: %f\n", maxError);

  cudaFree(d_x);
  cudaFree(d_y);
  free(x);
  free(y);
}

when I excude the code in terminal with the following command line

$ nvcc -o main main.cu

but the terminal said that

main.cu(20):error: expected and expression

I think it is something wrong with introduce the dynamic link library in this file
I am just a freshman using perfkit,could you tell me how to solve this problem?
Many thanks for helping!

Hi,

You can find more detail in our document here:

For example, the Construct() should look like this:

if(GetNvPmApiManager()->Construct(PATH_TO_NVPMAPI_CORE) != S_OK)
{
 return false; // This is an error condition
}

Thanks.