GEOS-5 Run-Time Characteristics for Heracles 5.2
AGCM Performance at various resolutions
| Resolution | CPUs (typical) | Timestep (sec) | Wall Clock (Hours) | Throughput (Days per day) | CPU Hours | Typical Data Volume (GB) | Notes |
|---|---|---|---|---|---|---|---|
| C12 (8°) | 24 | 900 | 0.16 | 1380 | 5 | 4 | Reynolds Ocean |
| C24 (~4°) | 96 | 900 | 0.20 | 1340 | 23 | 6 | Reynolds Ocean |
| C48 (~2°) | 96 | 900 | 0.30 | 745 | 38 | 13 | |
| C90 (~1°) | 96 | 900 | 0.65 | 383 | 73 | 38 | |
| C180 (~½°) | 216 | 450 | 1.67 | 150 | 360 | 140 | |
| C360 (~¼°) | 864 | 450 | 2.25 | 107 | 1980 | 530 | |
| C720 (14-km) | 1536 | 225 | 8.15 | 26 | 12600 | 2090 |
AGCM Scaling for Cubed-Sphere Version at C180 (1/2 deg, 2 day run)
| Layout NX | Layout NY | Total PEs | Total Time (sec) | Dynamics Time (sec) | Physics Time (sec) | Dynamics Percent | Physics Percent |
|---|---|---|---|---|---|---|---|
| 6 | 36 | 216 | 1170 | 407 | 667 | 34.8% | 57.0% |
| 8 | 36 | 288 | 945 | 326 | 536 | 34.5% | 56.7% |
| 8 | 48 | 384 | 780 | 269 | 426 | 34.5% | 54.6% |
| 12 | 72 | 864 | 534 | 166 | 275 | 31.1% | 51.5% |
AOGCM Performance
Here we present two runs of Heracles 5.2 to compare coupled AOGCM to an AGCM run of the same atmospheric resolution but without coupled to MOM. The first line is the coupled AOGCM and the second is the pure AGCM.
| Atmos Res | Ocean Res | CPUs | Timestep (sec) | Wall Clock (Hours) | Throughput (Days per day) | CPU Hours | Typical Data Volume (GB) | Notes |
|---|---|---|---|---|---|---|---|---|
| C90 (1°) | 720x410(½°) | 180 | 900 | 0.92 | 261 | 205 | 85 | Data size depends on HISTORY used |
| C90 (1°) | dataocean | 180 | 900 | 0.67 | 374 | 130 | 38 | Data size depends on HISTORY used |