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cluster:109 [2013/02/02 14:43] hmeij [Lammps GPU Testing (EC)] |
cluster:109 [2013/02/02 15:30] hmeij [Lammps GPU Testing (EC)] |
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CPU only 1 hour 5 mins | CPU only 1 hour 5 mins | ||
1 GPU 5 mins and 15 secs (a 18-19 times peed up) | 1 GPU 5 mins and 15 secs (a 18-19 times peed up) | ||
- | 2 GPUs 2 mins (see below) | + | 2 GPUs 2 mins |
+ | |||
+ | Above results seems overall a bit slower that at other vendor, but same pattern. | ||
- | Francis' | + | Francis' |
- | ^3d Lennard-Jones melt: for 10000 steps with 32000 atoms^ | + | ^3d Lennard-Jones melt: for 10, |
|CPU only| -np 1 | -np 6 | -np 12 | -np 24 | -np 36 | | |CPU only| -np 1 | -np 6 | -np 12 | -np 24 | -np 36 | | ||
- | |time| | + | |loop times| |
- | |GPU only| 1xK20 | 28s | | | | | + | |GPU only| 1xK20 |
- | + | |loop times| 28s | | |
+ | ^3d Lennard-Jones melt: for 100,000 steps with 32,000 atoms^^^^^^ | ||
+ | |GPU only| 1xK20 | 2xK20 | 3xK20 | 4xK20 | (-np 1-4) | | ||
+ | |loop times| | ||
+ | * Serial' | ||
+ | * GPU's serial time matches MPI -np 24 and can be further reduced to 10s, a 3x speed up | ||