1Running gmres with sor preconditioning 2 0 KSP Residual norm 0.968764 3 1 KSP Residual norm 0.361001 4 2 KSP Residual norm 0.247329 5 3 KSP Residual norm 0.0808915 6 4 KSP Residual norm 0.01289 7 5 KSP Residual norm 0.00375064 8 6 KSP Residual norm 0.000294092 9 7 KSP Residual norm 1.40861e-05 10 8 KSP Residual norm 3.48863e-07 11Number of iterations 8 12