Research Article
Analysis of GPR Wave Propagation in Complex Underground Structures Using CUDA-Implemented Conformal FDTD Method
Table 1
Speedup ratio of the two methods.
| FDTD Cells | CPU Times (s) | GPU Times (s) | Speedup Ratio |
| 128 × 128 | 1.063 | 0.398 | 2.67 | 256 × 256 | 4.290 | 0.743 | 5.77 | 512 × 512 | 18.981 | 1.879 | 10.11 | 1024 × 1024 | 72.834 | 6.773 | 10.75 | 1536 × 1536 | 158.545 | 15.016 | 10.56 | 2048 × 2048 | 299.919 | 26.276 | 11.41 | 2560 ×2560 | 475.560 | 41.643 | 11.58 | 3072 × 3072 | 701.439 | 59.439 | 11.81 | 4096 × 4096 | 1357.060 | 105.684 | 13.02 |
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