text:   0 KSP Residual norm 149.113 
    1 KSP Residual norm 39.0448 
    2 KSP Residual norm 6.10382 
    3 KSP Residual norm 1.50224 
    4 KSP Residual norm 0.445237 
    5 KSP Residual norm 0.110648 
    6 KSP Residual norm 0.0241288 
    7 KSP Residual norm 0.00571383 
    8 KSP Residual norm 0.000554198 
  