Running cg with none preconditioning
  0 KSP Residual norm 1.41421
  1 KSP Residual norm 0.707107
  2 KSP Residual norm 0.471405
  3 KSP Residual norm 0.353553
  4 KSP Residual norm 0.282843
  5 KSP Residual norm < 1.e-11