GPU-Accelerated Parallel FDTD on Distributed Heterogeneous Platform

Table 5

Speedup ratio (64 NP, problem size 2048 × 1024 × 1024).

Device	Loop time	Speedup
Pure CPU	1.5276	1
Pure GPU	0.1156	13.2
CPU + GPU	0.1079 (cuRatio = 0.90)	14.2