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