1 0 KSP Residual norm 2.0987 2 1 KSP Residual norm 0.143302 3 2 KSP Residual norm 0.00257015 4 3 KSP Residual norm 0.000285489 5 4 KSP Residual norm 2.38461e-05 6 5 KSP Residual norm 3.11037e-06 7Number of iterations = 5 8Residual norm 3.11037e-06 9