Trace Analysis Patterns (Part 109)

Message stream can be considered as a union of Message Spaces. A message space is an ordered set of messages preserving the structure of the overall trace. Such messages may be selected based on a memory space they came from or can be selected by some other general attribute, or a combination of attributes and facts. The differences from Message Set is that Message Space is usually much larger (with large scale structure) with various Message Sets extracted from it later for fine grained analysis. This pattern also fits nicely with Adjoint Spaces. Here’s an example of kernel and managed spaces in the same CDF / ETW trace from Windows platform where we see that kernel space messages came not only from System process but also from other process contexts:

In the context of general traces and logs such as debugger logs separate Message Space regions may be linked (or “surrounded”) by Interspace.

- Dmitry Vostokov @ + -

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