cuda error invalid argument 这是什么错误

[xiaotanker]

提取图像每个像素点的梯度，512*512的图片测试没有问题，换成1080p的图之后报invalid argument错误，请问这是怎么回事

__global__ void CountGrad(int nrow,int ncol, double *pic,  double *grad,  int *orient)
{
	


	int x = threadIdx.x+blockIdx.x*blockDim.x;
	int y = threadIdx.y+blockIdx.y*blockDim.y;
	int pos = y+x*ncol;

	if(x>0&&x<nrow-1&&y>0&&y<ncol-1){
			double diff1=pic[pos+ncol]-pic[pos-ncol];
			double diff2=pic[pos+1]-pic[pos-1];	
			grad[pos]=sqrt(diff1*diff1+diff2*diff2);

			orient[pos]=Round(atan2(diff1,diff2)/PI_4)+4;
			if(orient[pos]>=8) orient[pos]=0;


	}


}

    // Launch a kernel on the GPU with one thread for each element.
	dim3 dimBlock(BLOCK_SIZE,BLOCK_SIZE);
	dim3 dimGrid((greyPic.nrow/dimBlock.x)+1,(greyPic.ncol/dimBlock.y)+1);

    CountGrad<<<dimGrid,dimBlock>>>(greyPic.nrow,greyPic.ncol,dev_pic,dev_grad, dev_orient);