Comparison between Pass7 (P202) and Pass8 (P300) reconstruction
A comparison has been made between Pass7 and Pass8 reconstruction based on a single run (the 2nd run in the Fermi science data). There are three primary findings: timing, recon file size, and memory usage.
Details
P202 GR |
17-35-24 |
|
P300 GR |
20-08-12 |
|
Run |
239559565 |
2008-08-04 16:19:24 UTC |
#Evts |
2,010,995 |
Reconstruction processing time (Gleam)
Spreadsheet of job execution details:
https://docs.google.com/spreadsheet/ccc?key=0AveNVqKMtmVEdHJfbUNLMGs0S0NBcV9iaVhvMl9mdHc&usp=sharing
P202 (events/s) |
P300 (events/s) |
P202\:P300 ratio |
|---|---|---|
6.71 |
2.45 |
2.74 |
RECON File size
P202 (GB) |
P300 (GB) |
P300\:P202 |
|---|---|---|
30 GB/2M evts |
7.6 GB/20M evts |
2.54 |
Also see spreadsheet for exact numerology.
Memory footprint
Max memory reported by LSF
P202 (MB) |
P300 (MB) |
|---|---|
1800 |
1730 |
Notes:
- P202 max mem after processing ~96,000 events
- P300 max mem after processing only ~20,000 events
- P300 starts at ~600MB and has a mem leak of ~55kB/event, which limits clump size