Three-Dimensional Induced Polarization Parallel Inversion Using Nonlinear Conjugate Gradients Method

Table 1

Iteration times and runtimes of different method for linear equation computation.

Method	Iteration times	Overhead time (S)	Preconditioner time (S)	Solver time (S)	Total time (S)
CG	261	0.15	0.30	1.79	2.24
BICG	261	0.15	0.29	6.76	7.20
BICGSTAB	186	0.15	0.30	2.47	2.92
BICGSTAB(L)	87	0.15	0.29	2.25	2.69
GMRES	20	0.15	0.30	3.17	3.62
MINRES	245	0.15	0.29	1.87	2.30