Table 1.
Computational resources for end-to-end WMAP Q1-band processing.
| Item | Cost | Percentage |
|---|---|---|
| Data volume | ||
| Uncompressed volume | 76 GB | |
| Compressed volume | 14 GB | |
| Processing time (cost per run) | ||
| TOD initialization/IO time | 0.3 h | |
| Other initialization | 2.2 h | |
| Processing time (cost per sample) | ||
| Data decompression | 0.8 h | 3.5 % |
| TOD projection (P operation) | 1.1 h | 4.9 % |
| Sidelobe precomputation | 0.2 h | 0.4 % |
| Sidelobe interpolation | 6.4 h | 29.4 % |
| Orbital dipole | 1.4 h | 6.4 % |
| Gain sampling | 1.0 h | 4.6 % |
| Transmission imbalance sampling | 0.3 h | 1.2 % |
| Correlated noise sampling | 1.8 h | 8.2 % |
| Correlated noise PSD sampling | 0.4 h | 2.0 % |
| Map making | 6.0 h | 27.3 % |
| Sum of other TOD steps | 2.1 h | 9.8 % |
| Total cost per sample | 21.8 h | 100.0 % |
Notes. The values are given in total CPU-hours averaged over 100 samples. Wall time is obtained by dividing by ncores = 64. The auxiliary maps are computed every tenth run, contributing to a higher average runtime.
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