Linux kernel mailing list threads

This bipartite network contains contributions of persons to various threads of the Linux kernel mailing list. An edge represents a post; left nodes are persons and right nodes represent threads in the mailing list.


Internal namelkml_person-thread
NameLinux kernel mailing list threads
AvailabilityDataset is available for download
Consistency checkDataset passed all tests
Interaction network
Dataset timestamp 2006 ⋯ 2013
Node meaningPerson, thread
Edge meaningPost
Network formatBipartite, undirected
Edge typeUnweighted, multiple edges
Temporal data Edges are annotated with timestamps


Size n =379,554
Left size n1 =42,045
Right size n2 =337,509
Volume m =1,565,683
Unique edge count m̿ =599,858
Wedge count s =1,002,436,389
Claw count z =6,092,500,829,448
Cross count x =43,444,174,474,366,224
Square count q =11,033,932
4-Tour count T4 =4,099,266,604
Maximum degree dmax =46,620
Maximum left degree d1max =46,620
Maximum right degree d2max =9,101
Average degree d =8.250 12
Average left degree d1 =37.238 3
Average right degree d2 =4.638 94
Fill p =4.227 16 × 10−5
Average edge multiplicity m̃ =2.610 09
Size of LCC N =364,645
Diameter δ =22
50-Percentile effective diameter δ0.5 =3.791 92
90-Percentile effective diameter δ0.9 =5.656 67
Mean distance δm =4.609 19
Gini coefficient G =0.792 924
Balanced inequality ratio P =0.182 741
Left balanced inequality ratio P1 =0.067 359 1
Right balanced inequality ratio P2 =0.252 499
Relative edge distribution entropy Her =0.808 470
Power law exponent γ =3.711 04
Tail power law exponent γt =1.751 00
Degree assortativity ρ =−0.079 021 3
Degree assortativity p-value pρ =0.000 00
Spectral norm α =1,895.58
Algebraic connectivity a =0.002 041 70


Degree distribution

Cumulative degree distribution

Lorenz curve

Spectral distribution of the adjacency matrix

Spectral distribution of the normalized adjacency matrix

Spectral distribution of the Laplacian

Spectral graph drawing based on the adjacency matrix

Spectral graph drawing based on the Laplacian

Spectral graph drawing based on the normalized adjacency matrix

Degree assortativity

Zipf plot

Hop distribution

Edge weight/multiplicity distribution

Temporal distribution

Diameter/density evolution

Inter-event distribution

Node-level inter-event distribution

Matrix decompositions plots



[1] Jérôme Kunegis. KONECT – The Koblenz Network Collection. In Proc. Int. Conf. on World Wide Web Companion, pages 1343–1350, 2013. [ http ]
[2] Dirk Homscheid, Jérôme Kunegis, and Mario Schaarschmidt. Private-collective invention and open source software: Longitudinal insights from Linux kernel development. In Proc. IFIP Conf. on e-Business, e-Services and e-Society, pages 299–313, 2015. [ http ]