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cluster:109 [2013/01/17 14:26] hmeij [Laamps GPU Testing at MW] |
cluster:109 [2013/02/02 15:06] hmeij [Lammps GPU Testing (EC)] |
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**[[cluster: | **[[cluster: | ||
- | ===== Laamps | + | ===== Lammps |
+ | |||
+ | * 32 cores E2660 | ||
+ | * 4 K20 GPU | ||
+ | * workstation | ||
+ | * MPICH2 flavor | ||
+ | |||
+ | |||
+ | Same tests (12 cpu cores) using lj/cut, eam, lj/expand, and morse: **AU.reduced** | ||
+ | |||
+ | CPU only 6 mins 1 secs | ||
+ | 1 GPU 1 mins 1 secs (a 5-6 times speed up) | ||
+ | 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** | ||
+ | |||
+ | CPU only 1 hour 5 mins | ||
+ | 1 GPU 5 mins and 15 secs (a 18-19 times peed up) | ||
+ | 2 GPUs 2 mins (see below) | ||
+ | |||
+ | 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 | -np 1-4 | | ||
+ | |loop times| | ||
+ | ^3d Lennard-Jones melt: for 10,000 steps with 32,000 atoms^ | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ===== Lammps GPU Testing (MW) ===== | ||
Vendor: "There are currently two systems available, each with two 8-core Xeon E5-2670 processors, 32GB memory, 120GB SSD and two Tesla K20 GPUs. The hostnames are master and node2. | Vendor: "There are currently two systems available, each with two 8-core Xeon E5-2670 processors, 32GB memory, 120GB SSD and two Tesla K20 GPUs. The hostnames are master and node2. |