GEOS-5 Run-Time Characteristics
Performance at various resolutions
| Resolution | CPUs (typical) | WallClock Time (Hours) | CPU Time (Hours) | Data Volume (Gbytes) | Notes |
|---|---|---|---|---|---|
| b72 (2-deg) | 48 | 0.25 | 12 | 3 | Highly depends on fields saved |
| c72 (1-deg) | 96 | 0.5 | 48 | 13 | Highly depends on fields saved |
| d72 (0.5-deg) | 384 | 1 | 384 | 52 | Highly depends on fields saved |
| e72 (0.25-deg) | 768 | 4.75 | 3648 | 288 | Highly depends on fields saved |
| c720 x 72L (14-km) | 1350 | 8 | 10800 | 832 | Highly depends on fields saved |
| c1440 x 72L (7-km) | 4000 | 22 | 88000 | 3328 | Highly depends on fields saved |
Scaling for Cubed-Sphere Version at C180 (1/2 deg)
| Layout NX | Layout NY | Total PEs | Total Time (hrs) | Dynamics Time | Physics Time | Dynamics Percent | Physics Percent |
|---|---|---|---|---|---|---|---|
| 6 | 36 | 216 | 1.49 | 0.34 | 1.15 | 23.02% | 76.98% |
| 8 | 48 | 384 | 0.61 | 0.15 | 0.46 | 24.58% | 75.42% |
| 12 | 72 | 864 | 0.35 | 0.12 | 0.22 | 35.18% | 64.82% |
Scaling for Lat-Lon Version at d72 (1/2 deg)
| Layout NX | Layout NY | Total PEs | Total Time (hrs) |
|---|---|---|---|
| 6 | 36 | 216 | 1.72 |
| 8 | 48 | 384 | 1.21 |
| 12 | 72 | 864 | 0.72 |
Layout Scaling Comparison for Lat-Lon Version at d72 (1/2 deg)
| Layout NX | Layout NY | Total PEs | Total Time (hrs) | |
|---|---|---|---|---|
| 4 | 96 | 384 | 1.59 | |
| 6 | 64 | 384 | 1.17 | <= Sweet Spot |
| 8 | 48 | 384 | 1.21 | |
| 12 | 32 | 384 | 1.20 | |
| 16 | 24 | 384 | 1.27 |