Software Diagnostics Library

Usually, in traces and logs, messages from different components are highly interleaved. Direct chronological reading may cause confusion because every component’s Adjoint Thread of Activity appears entangled with every other one:

Bethe Ansatz analyzes such a trace by treating requests, threads, agents, transactions, or log-producing entities as “quasi-particles” whose global behavior can be reconstructed from many local pairwise interactions. The inspiration for the pattern name comes from Bethe ansatz, introduced by Hans Bethe in 1931. In physics, it is a method for constructing exact solutions of certain many-body systems: in integrable systems, complex many-body scattering can be represented through factorized two-body scattering processes. In trace analysis, we often face a “many-body” problem: many requests, threads, services, queues, locks, agents, retries, callbacks, and timeouts interact within a single shared diagnostic space. Instead of trying to understand the whole trace as one monolithic event cloud, we decompose it into stable activity lines and pairwise encounters that may explain the global behavior:

The Bethe ansatz has many forms, including coordinate, algebraic, analytic, functional, nested, and thermodynamic variants. For this pattern, the most useful metaphor is the coordinate Bethe ansatz: represent the global state by positions of entities and interaction effects between them. We have the following analogies:

• Particle/excitation: request, thread, transaction, agent, session, workflow
• Coordinate: timestamp, component, hop number, queue position, memory address, trace span
• Momentum/rapidity: (activity) rate, latency class, retry rhythm, priority, causal direction
• Two-body scattering: (pairwise interaction) lock contention, queue wait, API call, resource conflict
• Scattering phase shift: delay, reordered event, changed state, timeout extension, retry offset
• Factorized many-body scattering: whole trace explained as composition of pairwise effects
• Bethe equations: consistency constraints imposed by loops, boundaries, cycles, repeated paths
• Non-integrability: residual behavior not explainable by pairwise interactions

Interactions can be found among Motifs, Macrofunctions, and actors of Activity Theatre.

We suggest the following diagnostic analysis procedure:

1. Identify trace quasi-particles that preserve identity across the trace.
2. Choose a coordinate system: the trace can be read through coordinates other than time.
3. Detect pairwise encounters: look for places where two entities interact; these are diagnostic “scattering” events.
4. Estimate phase shifts where a pairwise encounter often changes the apparent trajectory of an activity. The phase shift is the observable deformation caused by interaction.
5. Test factorization by asking the question: Can the global anomaly be explained as a product of pairwise interactions?

If the answer to the last question is yes, then the system is “Bethe-like”: complex but decomposable. If the answer is no, there may be a true many-body effect, such as shared cache collapse, global scheduler starvation, cascading timeout storm, distributed deadlock, correlated retry amplification, emergent agentic loop, or resource exhaustion caused by collective behavior.

Additionally, we can form a Motivic Trace from the resulting pairwise interaction layers. Motivic Trace compresses a trace into explanatory motives. Bethe Ansatz compresses a trace into pairwise interaction motives whose composition reconstructs the observed global behavior. In this sense, Bethe Ansatz can be viewed as a structured route to Motivic Trace: first decompose the tangled chronological trace into stable activity lines and pairwise encounters; then integrate those encounters into higher-level explanatory motives such as queue delay, database lock wait, retry ordering, and response ordering. In summary: Motivic Trace is the broader compression pattern; Bethe Ansatz is a pairwise-factorized way to build it.

A historical note: this analysis pattern also extends physical analogies of debugging.

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

Memory Analysis Patterns (MAPs) including memory dump, malware, software trace (TAPs), and other patterns and pattern catalogs from Software Diagnostics Institute form the very rich semantic network. Now it is possible (by using a metaphorical bijection) to create a catalog of General Patterns of Abnormal Structure and Behaviour including software, hardware, biological behavior including animal (ethology) and human behavior, sociological and historical behavior including economics, business and finance, ethics and law, and even behavior of chemical and physical systems. Such “GAPs of Structure and Behavior” may include wait chains, spikes, deadlocks, etc. We provide more specific examples in the forthcoming parts. So we are a few steps closer to realization of my old dangerous idea of a parameterized science of universal memory dumps by the so called science files or might event a general diagnostics discipline.

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

This book came to my attention because it starts with category theory in the first chapters and then moves to traditional contemporary mathematical physics topics such as topology and operators. It also covers groups, vector spaces, their duals, tensors, associative and Lie algebras, representation theory, spectral theorem, distributions, homotopy and homology. The author also provides physical examples along the way such as Fock vector spaces, dynamical systems, Minkowski space and algebra of observables. The flow of this mathematical text is very smooth (proofs can be omitted from reading) and explanations are very intuitive. The latter seems to be the main goal of this text. It is also structured into 56 chapters so it can be possible to casually read this book in 2 months during commuting like I did. One strange thing I noticed though is the avoidance of the manifold terminology: the author only uses the word “manifold” only once and without an explanation what it is about so you may even not notice that.

Mathematical Physics (Chicago Lectures in Physics)

- Dmitry Vostokov @ LiterateScientist.com -

It was my dream since the school days to learn physics in its entirety. Whereas The Feynman Lectures on Physics: Commemorative Issue, Three Volume Set that I own (I read it at school before university in Russian translation) is a bit light and don’t include the developments of the past 40 - 50 years and Course of Theoretical Physics by Landau was a bit heavy for me at those times (although I read Mechanics volume in Russian and a few beginning chapters from other volumes) I finally found what I need: Theoretical Physics course from Walter Greiner. I have now the first 3 volumes (there are many more volumes including Quantum Electrodynamics, Gauge Theory of Weak Interactions, Quantum Chromodynamics) and just started reading the first one: Classical Mechanics: Point Particles and Relativity (Classical Theoretical Physics). It explains all necessary mathematics, has all derivations, lots of examples and illustrations, and even talks about dark matter (in the first classical mechanics volume). More important I also ordered the original German edition (Theoretische Physik. Klassische Mechanik I. Dynamik und Dynamik der Punktteilchen - Relativität) and reading both in parallel. This improves my German as well.

- Dmitry Vostokov @ LiterateScientist.com -

As the new decade is approaching (2011-2020) we would like to make a few previews and predictions:

- Increased complexity of software will bring more methods from biological, social sciences and humanities in addition to existing methods of automated debugging and computer science techniques

- Focus on first fault software problem solving (when aspect)

- Focus on pattern-driven software problem solving (how aspect)

- Fusion of debugging and malware analysis into a unified structural and behavioral pattern framework

- Visual debugging, memory and software trace visualization techniques

- Software maintenance certification

- Focus on domain-driven troubleshooting and debugging tools as a service (debugware TaaS)

- Focus on security issues related to memory dumps and software traces

- New scripting languages and programming language extensions for debugging

- The maturation of the science of memory snapshots and software traces (memoretics)

Imagining is not not limited to the above and more to come and explain in the forthcoming parts.

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

There many interpretations of the letter M in M-theory but I propose another one: M stands for Memory. In any outcome it surely will be committed to memory in the future either as successful or not. On the other hand I’m now trying to make sense of it in relation to Memory as an ur-foundation (ur-, primordial, German prefix).

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

The CRC Encyclopedia of Mathematics, Third Edition - 3 Volume Set

I spotted this book on Amazon US and was thrilled to have the new edition in 3 volumes for easy handling when reading. I also have the previous edition that is even featured on my own book cover (the picture of my previous library book arrangement, the book is highlighted in white rectangle in the lower right corner):

This is a unique volume that sits between The Princeton Companion to Mathematics (that I’m also reading now) and Encyclopedic Dictionary of Mathematics: The Mathematical Society of Japan (that I also own). In fact after reading 3 volumes from cover to cover I can start with 2 volumes of EDM. There is also Springer Encyclopaedia of Mathematics in 11 volumes with various additional supplement volumes that I plan to own as well and it looks to me on the same level as EDM.

After searching for the best price I ordered a copy from Amazon DE and after my purchase in just a few days the price was up by 50%! I can only explain this that more people tried to purchase after I used twitter to announce this encyclopedia (there were 5 copies available on Amazon DE and in just 2 days only 1 left) or there was a mistake in price.

3 volumes arrived and I immediately started reading them, a few pages from each volume every day using mod 3 reading technique, for example, Wed - Vol I, Thu - Vol II, Fri - Vol III, Mon - Vol I, an so on. I prefer paper books for bulk reading instead of electronic version (in this case corresponding website) although if I’m interested in a specific article or a keyword I go to Wolfram MathWorld website to get the latest update and citations. These paperback volumes are just for day-to-day scheduled reading to get ideas and general mathematical education. This is why I don’t need an Index. For example, just after reading the first pages I got the idea of cubic (qubic) memory representation.

I usually put reviews on Amazon after I finish a book from cover to cover but in this case the review would be waiting for at least a year so I write it now based on my first impressions. After some time I plan to update it.

- Dmitry Vostokov @ LiterateScientist.com -

I finished reading Dirac’s biography The Strangest Man 3 months ago and started to read this book. Its title intrigued me when I was browsing recent physics releases on Amazon and I bought it. It looks to me like the mix of brief biographical notes with explanation of physical theories. Here learning from mistakes undoubtedly helps to understand special and general relativity better. I also liked the short and clear explanation of EPR paradox in just one page, “revisionist” and unusual biographical notes on other scientists and their faults, like Galileo and Newton, and notes about Einstein’s private life. This makes him really human (he was like an ideal scientist from Plato Universe for me before). When I was reading Not Even Wrong and the Trouble With Physics books I thought of the possible “yellow press physics” (which is not bad, and doesn’t mean bad quality for me, I like to read yellow press sometimes and listen to pop music) and one day, at lunch, when reading about Newton madness and other peculiar character traits I thought about “yellow press physics” again. Was the choice of this book hardcover and jacket colors (yellow) made deliberate? Anyway, while approaching the end of the book and reading about how Einstein wasted 20-30 years on his idée fixe unified theories I immediately recalled String Theory, and indeed, the author voiced the same thoughts a few moments later when I turned a page over. I also liked the discussion on how General Relativity might have been discovered if it wasn’t formulated by Einstein. The author tells us that it would have been done via a QFT route. Einstein has fallen in my eyes, and now, after reading this book, he is not quite the hero of science like I imagined before. Nevertheless, his stature from McDonald’s is still on my shelves.

Einstein’s Mistakes: The Human Failings of Genius

I don’t want to repeat Einstein’s mistakes… 

- Dmitry Vostokov @ LiterateScientist.com -

This is an encyclopedic work I bought in a local book shop and finally finished reading today. It took me a year to read from cover to cover and pages were falling out of the glue but I continued to read. Highly recommended for education and another view on human history. The review of Freud was enlightening to me because I didn’t know about the recent scholarship criticizing his work. In fact, I so liked this book that just bought it again in a hardcover version from Folio Society and start rereading it again soon.

Ideas: A History of Thought and Invention, from Fire to Freud

The second encyclopedic book seems was written before the previous one but looks like the logical sequel to it. I’m starting reading it next week.

The Modern Mind: An Intellectual History of the 20th Century

- Dmitry Vostokov @ LiterateScientist.com -