 	
 	// number of cells in x and y directions
 	// including unused boundary cells
-	uint num_rows = 128 + 2;
-	uint num_cols = 128 + 2;
+	uint num_rows = 4096 + 2;
+	uint num_cols = 4096 + 2;
 	uint size_temp = num_rows * num_cols;
 	uint size = (num_rows - 2) * (num_cols - 2);
 	

	free(temp);
	free(temp_old);
	
	cudaDeviceReset();
	
	return 0;

	CUDA_SAFE_CALL (cudaFree(b_d));
	CUDA_SAFE_CALL (cudaFree(temp_d));
	
	CUDA_SAFE_CALL (cudaFree(bl_norm_L2_d));
	
	/////////////////////////////////
	// end timer
	//time = walltime(&time);
