Archive for May 7th, 2014

Trace Analysis Patterns (Part 84)

Wednesday, May 7th, 2014

One of the powerful trace analysis techniques is using Adjoint Threads of Activity to filter various linear message activities (as a generalization of Thread Of Activity). Such filtered activities can then be analysed either separately (Sheaf of Activities) or together such as a new pattern we introduce here: Message Cover. If we identify parallel ATIDs (ATID is Adjoint TID, see an example) and see that one covers the other we can then make a hypothesis that they are correlated. Here is a graphical example of a Periodic Message Block largely composed from various Error Messages that covers periodic Discontinuities from another ATID (we can also consider the latter as periodic message blocks consisted from Silent Messages):

This is analogous to a cover in topology.

- Dmitry Vostokov @ + -