Scientific Programming / 2015 / Article / Tab 2

Research Article

Performance of a Code Migration for the Simulation of Supersonic Ejector Flow to SMP, MIC, and GPU Using OpenMP, OpenMP+LEO, and OpenACC Directives

Table 2

Computing times and speed-up factors obtained using OpenMP on the Xeon CPU with HT disabled. The speed-up factors are calculated with best optimized serial version as reference. With HT: hyper threading, V: vectorization, D: deactivated, and A: activated.

Threads HT-D V-A Speed-up

1 34 h 48 m 32 s (1.00X)
2 19 h 26 m 58 s (1.79X)
3 12 h 20 m 02 s (2.82X)
4 09 h 35 m 11 s (3.63X)
5 07 h 58 m 53 s (4.36X)
6 07 h 15 m 54 s (4.79X)
7 06 h 58 m 14 s (4.99X)
8 06 h 40 m 30 s (5.21X)
9 06 h 18 m 21 s (5.52X)
10 05 h 55 m 56 s (5.87X)
11 05 h 41 m 52 s (6.11X)
12 05 h 40 m 23 s (6.14X)

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