Very poor memory access performance with CUDA
#include "cuda_runtime.h"
#include <stdio.h>

#define d_MaxParallelRows 320
#define d_MinTreatedRow   5
#define d_MaxTreatedRow   915
#define d_RowsResolution  1
#define k_ThreadsPerBlock 64

__global__ void myKernel(int Xi_FirstTreatedRow)
{
  int l_ThreadIndex = blockDim.x * blockIdx.x + threadIdx.x;
  if (l_ThreadIndex >= d_MaxParallelRows)
    return;
  int l_Row = Xi_FirstTreatedRow + (l_ThreadIndex * d_RowsResolution);
  if (l_Row <= d_MaxTreatedRow) {

    //float l_SrcIntegral[1700];
    float* l_SrcIntegral = (float*)malloc(1700 * sizeof(float));

    for (int x=185; x<1407; x++) {
      for (int i=0; i<1700; i++)
        l_SrcIntegral[i] = i;
    }

    free(l_SrcIntegral);
  }
}

int main()
{
  cudaError_t cudaStatus;

  cudaStatus = cudaSetDevice(0);

  int l_ThreadsPerBlock = k_ThreadsPerBlock;
  int l_BlocksPerGrid = (d_MaxParallelRows + l_ThreadsPerBlock - 1) / l_ThreadsPerBlock;

  int l_FirstRow = d_MinTreatedRow;
  while (l_FirstRow <= d_MaxTreatedRow) {
    printf("CUDA: FirstRow=%dn", l_FirstRow);
    fflush(stdout);

    myKernel<<<l_BlocksPerGrid, l_ThreadsPerBlock>>>(l_FirstRow);

    cudaDeviceSynchronize();

    l_FirstRow += (d_MaxParallelRows * d_RowsResolution);
  }

  printf("CUDA: Donen");

  return 0;
}