Ideas to improve `bpf_graph` plugin

[vobst]

• add options to filter by
  • process id
  • BPF object id+type
• only draw the connected component of the not filtered objects
  • up to a certain depth
• better layout
  • clustering of programs by type, attachment point or attach type
  • edges that avoid objects
  • use mode size, e.g., to represent nr of edges
• coloring:
  • generate a legend
  • remove randomness
• find and recommend a good graph viewer