Table 2.
Computational resources required for end-to-end COSMOGLOBE processing.
| Item | 30 | 44 | 70 | K | Ka | Q1 | Q2 | V1 | V2 | W1 | W2 | W3 | W4 | Sum |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Data volume | ||||||||||||||
| Compressed TOD volume | 86 | 178 | 597 | 13 | 12 | 15 | 15 | 19 | 18 | 26 | 26 | 26 | 26 | 1053 |
| Processing time (cost per run) | ||||||||||||||
| TOD initialization/IO time | 1.8 | 2.5 | 7.8 | 0.7 | 0.6 | 0.8 | 0.7 | 0.9 | 0.8 | 1.3 | 1.3 | 1.0 | 0.9 | 21.1 |
| Other initialization | 14.6 | |||||||||||||
| Total initialization | 35.7 | |||||||||||||
| Gibbs sampling steps (cost per sample) | ||||||||||||||
| Huffman decompression | 1.2 | 2.2 | 23.2 | 0.8 | 0.9 | 1.1 | 1.1 | 1.5 | 1.4 | 2.0 | 2.0 | 2.0 | 2.0 | 41.4 |
| Array allocation | 0.4 | 0.9 | 51.6 | 1.3 | 1.3 | 1.5 | 1.5 | 3.1 | 3.3 | 4.0 | 3.8 | 4.0 | 4.0 | 80.7 |
| TOD projection (P operation) | 0.9 | 2.0 | 12.3 | 6.1 | 7.1 | 8.7 | 8.9 | 11.4 | 11.3 | 15.9 | 15.8 | 15.7 | 15.8 | 131.9 |
| Sidelobe evaluation | 1.2 | 2.6 | 9.5 | 3.0 | 3.5 | 4.1 | 4.2 | 5.5 | 5.4 | 7.8 | 7.7 | 7.7 | 7.5 | 69.7 |
| Orbital dipole | 0.9 | 2.0 | 9.0 | 1.2 | 1.5 | 1.8 | 1.9 | 2.6 | 2.5 | 3.8 | 3.8 | 3.8 | 3.8 | 38.6 |
| Gain sampling | 0.6 | 0.9 | 2.2 | 1.3 | 1.3 | 0.8 | 0.8 | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 | 15.3 |
| 1 Hz spike sampling | 0.3 | 0.4 | 1.9 | 2.7 | ||||||||||
| Correlated noise sampling | 2.1 | 4.3 | 24.8 | 2.7 | 2.9 | 3.7 | 3.8 | 6.2 | 5.4 | 7.7 | 7.4 | 6.9 | 8.3 | 86.4 |
| Correlated noise PSD sampling | 5.0 | 6.2 | 1.6 | 0.3 | 0.3 | 0.3 | 0.3 | 0.5 | 0.5 | 0.7 | 0.6 | 0.6 | 0.7 | 17.6 |
| TOD binning (Pt operation) | 0.1 | 0.1 | 10.5 | 0.8 | 0.8 | 1.0 | 1.0 | 1.7 | 1.6 | 2.4 | 2.4 | 2.4 | 2.4 | 27.2 |
| Mapmaking | 9.2 | 9.7 | 13.1 | 12.7 | 21.7 | 20.2 | 35.4 | 34.9 | 36.1 | 39.3 | 232.3 | |||
| MPI load-balancing | 1.2 | 1.7 | 9.2 | 2.2 | 2.0 | 2.2 | 2.1 | 3.6 | 3.3 | 4.8 | 4.6 | 4.5 | 4.6 | 46.0 |
| Sum of other TOD processing | 0.7 | 1.6 | 13.1 | 0.1 | 0.2 | 0.5 | 0.4 | 0.7 | 0.8 | 0.9 | 1.0 | 0.9 | 1.2 | 22.1 |
| TOD processing cost per sample | 14.6 | 24.9 | 169.7 | 28.8 | 31.5 | 38.7 | 38.7 | 59.8 | 57.0 | 86.6 | 85.2 | 85.8 | 90.8 | 812.1 |
| Amplitude sampling | 16.2 | |||||||||||||
| Spectral index sampling | 32.1 | |||||||||||||
| Average cost per sample | 418.9 |
Notes. All times correspond to CPU hours, and all data volumes are reported in GB. Reported times are averaged over more than 100 samples, and vary by ≲5% from sample to sample. The average cost per sample takes into account the undersampling of 70, V, and W.
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