Archive for April 29th, 2017

Trace Analysis Patterns (Part 146)

Saturday, April 29th, 2017

The idea of Tensor Trace analysis pattern initially appeared in the context of memory dumps as general traces with several special traces inside but then developed further when working on Singleton Trace analysis pattern when we realized that several Singleton Traces may form a new separate log:

Therefore, we may combine several traces and logs into one global trace where each message references separate local traces and logs:

Typical example is a repeated tracing. Each trace has an i-th index spanning the number of trace messages. We say it is has Ti components. Each individual logging has an j-th index and overall global log has Tj components. Together the form the second rank tensor:

There can be Tensor Traces of the higher rank, for example, the 3rd component spanning computers:

This analysis pattern is different from Meta Trace where the latter is about trace evolution during software development. It is also different from Trace Dimension which is about one trace (Tensor Trace of rank 1).

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

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Trace Analysis Patterns (Part 145)

Saturday, April 29th, 2017

If we consider a log as a text, ignore its column structure, and do search for the particular attribute value (for example, PID) we get Message Set consisting of messages having that attribute value as column (Adjoint Thread of Activity) and messages having that attribute value referenced in their message text. We call this pattern Braid of Activity because metaphorically it looks like Adjoint Threads of Activity cross each other (like multibraiding):

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

Posted in Log Analysis, Software Trace Analysis, Software Trace Reading, Trace Analysis Patterns | No Comments »