cluster:109
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cluster:109 [2013/02/02 14:03] hmeij [Lammps GPU Testing (EC)] |
cluster:109 [2013/02/02 15:30] hmeij [Lammps GPU Testing (EC)] |
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| - | Same tests (12 cpu cores) using lj/cut, eam, lj/expand, and morse: AU.reduced | + | Same tests (12 cpu cores) using lj/cut, eam, lj/expand, and morse: |
| CPU only 6 mins 1 secs | CPU only 6 mins 1 secs | ||
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| 2 GPUs 1 mins 0 secs (never saw 2nd GPU used, problem set too small?) | 2 GPUs 1 mins 0 secs (never saw 2nd GPU used, problem set too small?) | ||
| - | Same tests (12 cpu cores) using a restart file and using gayberne: GB | + | Same tests (12 cpu cores) using a restart file and using gayberne: |
| 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' | ||
| + | |||
| + | ^3d Lennard-Jones melt: for 10,000 steps with 32,000 atoms^^^^^^ | ||
| + | |CPU only| -np 1 | -np 6 | -np 12 | -np 24 | -np 36 | | ||
| + | |loop times| | ||
| + | |GPU only| 1xK20 | 2xK20 | 3xK20 | 4xK20 | | ||
| + | |loop times| | ||
| + | ^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 | ||
| ===== Lammps GPU Testing (MW) ===== | ===== Lammps GPU Testing (MW) ===== | ||
cluster/109.txt · Last modified: 2013/10/16 15:13 by hmeij
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