Reduce the number of info objects

[ompiteam]

Some people would like to see less info attributes in objects. Either because they want more predictable/comparable topologies (synthetic and diff can help), or to make the discovery lighter (space and/or time). Not clear if that's a good idea, but save notes here.

Ideas:

• add topology flags to ignore some kinds of infos (hardware model, hardware parameter, hardware ID, software stuff, etc) during discovery
• add callback for filtering info during discovery
• add topology_prune_infos() with some flags like above, or a per-info callback and/or per-object callback

[ompiteam]

Imported from trac issue 112. Created by bgoglin on 2014-08-31T15:06:54, last modified: 2014-08-31T15:06:54