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Table 4 Time to convergence

From: Newton–Raphson preconditioner for Krylov type solvers on GPU devices

 

DIAG

SSOR

BFGS–DIAG

BFGS–SSOR

m = 3

m = 5

m = 7

m = 10

m = 3

m = 5

m = 7

m = 10

GR_30_30

5.14E−02

1.50E−02

4.07E−02

3.43E−02

4.86E−02

5.73E−02

1.40E−02

1.56E−02

1.56E−02

1.56E−02

BCSSTK14

2.95E+00

NA

2.02E+00

1.97E+00

2.01E+00

2.54E+00

7.55E−01

9.60E−01

9.83E−01

1.15E+00

BCSSTK15

NA

NA

1.44E+01

2.00E+01

1.73E+01

NA

5.46E+00

5.29E+00

8.97E+00

NA

RDB450

NA

NA

1.33E+01

1.46E+01

1.27E+01

NA

2.06E+00

3.01E+00

3.30E+00

4.94E+00

  1. In the table, e.g. 5.14E−02 means \(5.14 \times 10^{-2}\) s. NA denotes the preconditioned GCR doesn’t converge within 150,000 iterations, and m denotes the number of previous iterations to be taken into consideration