Research Article
Parallel Multiprojection Preconditioned Methods Based on Subspace Compression
Table 7
Convergence behavior and parallel performance of the PPGMRES(
) method, in conjunction with the MPMSC scheme for thermal2 problem.
| | thermal2 | Cores/subdomains | | 64 | 128 | 256 | 512 | 1024 |
| | MPMSC | | | | | | | Pre-Time | 1491.13 | 198.63 | 51.66 | 10.12 | 5.51 | | Comm-Time | 176.09 | 42.41 | 45.64 | 44.51 | 26.97 | | GMRES-Time | 738.37 | 350.66 | 297.53 | 251.73 | 149.12 | | Total-Time | 2229.50 | 549.29 | 349.19 | 261.84 | 154.64 | | Iterations | 17 () | 16 () | 18 () | 17 () | 10 () | | Aggregates | 21 | 38 | 70 | 135 | 268 | | Preconditioned Relative Residual | | | | | | | Relative Residual | | | | | |
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