Discussion related to cado-nfs

[eric.jeancolas@free.fr]

Hello

For one number, a c160 with SNFS, I got the following end of sysout log.

Info:Square Root: Factors: 
626816785777451600758981838272270646850682251997773636331126303903 
6472832583977168929436763320576275854833857768912955644720878207260226100095188285172984249397
Warning:Polynomial Selection (size optimized): some stats could not be 
displayed for polyselect1 (see log file for debug info)
Warning:Polynomial Selection (root optimized): some stats could not be 
displayed for polyselect2 (see log file for debug info)
Info:Generate Factor Base: Total cpu/real time for makefb: 4.72/2.01359
Info:Generate Free Relations: Total cpu/real time for freerel: 102.51/26.282
Info:Lattice Sieving: Aggregate statistics:
Info:Lattice Sieving: Total number of relations: 28042254
Info:Lattice Sieving: Average J: 1894.87 for 3517286 special-q, max bucket 
fill -bkmult 1.0,1s:1.081640
Info:Lattice Sieving: Total time: 785028s
Info:Filtering - Duplicate Removal, splitting pass: Total cpu/real time for 
dup1: 57.22/119.639
Info:Filtering - Duplicate Removal, splitting pass: Aggregate statistics:
Info:Filtering - Duplicate Removal, splitting pass: CPU time for dup1: 118.9s
Info:Filtering - Duplicate Removal, removal pass: Total cpu/real time for 
dup2: 472.92/438.735
Info:Filtering - Duplicate Removal, removal pass: Aggregate statistics:
Info:Filtering - Duplicate Removal, removal pass: CPU time for dup2: 
378.59999999999997s
Info:Filtering - Singleton removal: Total cpu/real time for purge: 
388.88/400.862
Info:Filtering - Merging: Merged matrix has 2351820 rows and total weight 
404898763 (172.2 entries per row on average)
Info:Filtering - Merging: Total cpu/real time for merge: 328.58/94.9078
Info:Filtering - Merging: Total cpu/real time for replay: 89.74/77.1238
Info:Linear Algebra: Total cpu/real time for bwc: 100411/25707.4
Info:Linear Algebra: Aggregate statistics:
Info:Linear Algebra: Krylov: WCT time 16545.96, iteration CPU time 0.21, COMM 
0.01, cpu-wait 0.0, comm-wait 0.0 (73728 iterations)
Info:Linear Algebra: Lingen CPU time 469.42, WCT time 136.78
Info:Linear Algebra: Mksol: WCT time 8786.49, iteration CPU time 0.23, COMM 
0.01, cpu-wait 0.0, comm-wait 0.0 (36864 iterations)
Info:Quadratic Characters: Total cpu/real time for characters: 82.81/34.1738
Info:Square Root: Total cpu/real time for sqrt: 680.74/214.047
Info:HTTP server: Shutting down HTTP server
Info:Complete Factorization / Discrete logarithm: Total cpu/elapsed time for 
entire factorization: 1.55137e+06/419762
Info:root: Cleaning up computation data in /tmp/cado.ej7v99s4

I use a 4-core CPU, so the ratio at the end Total cpu/elapsed time = 
1.55137e+06/419762 = 3.7 is consistent.
But the addition of intermediate results doesn't give the total.
4.72+102.51+785028+57.22+472.92+388.88+328.58+89.74+100411+82.81+680.74 gives 
887647.12, not the 1551370 see as a total.

The total seems ok. So I may miss some intermediate results or I may 
misinterpret some data.

Could you please help me understand these data?

Best regards.