Dr. Neil Gunther
@drqz.bsky.social
Performance analyst, 'rocket scientist' & Xerox PARC alum 🇦🇺🇺🇸 Consultant, author, teacher, physics, math, stats, chem and some 🎸 performance too.
1. "Titan Transients and #LLM Scalability: The ghost in the machine," ACM Queue, Vol. 24, No. 3, July 22, 2026 spawn-queue.acm.org/doi/10.1145/...
Does the LLM efficient-compute frontier represent new physics? — Instantons in the machine speakerdeck.com/drqz/does-th... #genAI #Large #Language #modeling #LLM #computer #metastability #performance #USL #physics
Does the Efficient Compute Frontier Represent New Physics?
The so-called “Efficient Compute Frontier” (ECF) refers to an apparent hard constraint on the achievable error reduction as a function of the amount of …
speakerdeck.com
Ordinary AI output requires extraordinary human verification. (Apologies to C. Sagan)
Some performance consequences often overlooked in redundancy plans perfdynamics.blogspot.com/2014/03/perf...
Performance of N+1 Redundancy
How can you determine the performance impact on SLAs after an N+1 redundant hosting configuration fails over ? This question came up in the...
perfdynamics.blogspot.com
RIP James Lovell, commander of Apollo 13 (played by Tom Hanks in the movie of the same name), has died at age 97.
A. Displaying metrics, errors, etc., is not the same thing as displaying metric errors. 1. How it is (old school top) CPU usage: 5.79 %usr, 4.51 %sys, 89.68 %idl 2. How it could be (nay, SHOULD be) CPU usage: 5.79 ± 0.29 %usr, 4.51 ± 0.23 %sys, 89.68 ± 4.48 %idl
Online classroom buzz www.perfdynamics.com/Classes/comm... What Guerrilla Grads are saying about why you should become an alumnus. Enroll here www.perfdynamics.com/Classes/sche... 🎓 #performance #engineering #capacity #management #marketplace #trends #GCAP #GDAT #PDQW
PSA: New open access Journal of Systems Scalability launching. Editor-in-Chief: Carlos Juiz www.icck.org/jss #systems #architecture #performance #scalability
GCAP Day 10. What you missed: ❥ Avalanche vs. Paxos coordination scalability ❥ Memcache scalability analysis with USL ❥ Queueing models of Kubernetes control and data planes ❥ Class dismissed 📚 🎓🍻
Never let reality get in the way of a good performance model.
GCAP Day 9. What you missed: ❥ Rate limiting services via Guerrilla queueing models ❥ Performance visualization tools ❥ Zookeeper scalability analysis with the USL www.perfdynamics.com/Manifesto/US...
GCAP Day 8. What you missed: ❥ Linear vs Dynamic programming ❥ Benchmarking/load testing prats and pitfalls ❥ Prelim discussion about Kefka, Kubernetes ❥ What kind of scheduler is in the K8s control plane?
GCAP Day 7. What you missed: ❥ Python least_squares() seems to be a bloated implementation of codes in the "Numerical Recipes" book. ❥ To apply the USL, use curve_fit() instead. ❥ Multivariate regression: How to reattach (noisy) fingers to amputated daily "numero uno" data
GCAP Day 6. What you missed: ❥ USL scalability analysis lnkd.in/gxaaAiww ❥ Student gets PDQ 7.0 running on Python 3.12 👏🎉 lnkd.in/gPzzHiez ❥ Homework Q-5 solved (a) analytically (b) cf. with corresponding PyDQ model - Discussed why analytic calculation was wrong
Ditto for the performance analysis & capacity planning of computer systems in general: - Assume failure - Plan for resilience - Monitor everything - Analyze and predict performance and capacity - Have an exceptional performance team of skilled experts lnkd.in/g8eGRnYq
Guerrilla Capacity Planning (GCAP) Online — EU Edition — registration is now OPEN Dates: July 21 through August 1, 2025 Times: 1500 - 1900 CET www.perfdynamics.com/Classes/sche... Click on the DETAILS box (at the RHS) to register www.eventbrite.com/e/guerrilla-...
I recently discovered the original 1992 paper where I first introduced the concept of barycentric coordinates for visualizing multiprocessor/multicore performance. www.perfdynamics.com/papers.pdf More modern renditions (animations) can be viewed here www.perfdynamics.com/Tools/tools....
Guerrilla training classes (GCAP) online are brutal. Despite the rumors, there are no long lunches. Only performance zealots should apply. Next class starts July 21, 2025. www.perfdynamics.com/Classes/sche... #Performance #Training
Guerrilla Capacity Planning (GCAP) Online — EU Edition — registration is now OPEN Dates: July 21 through August 1, 2025 Times: 1500 - 1900 CET www.perfdynamics.com/Classes/sche... Click on the DETAILS box (at the RHS) to register www.eventbrite.com/e/guerrilla-...
TIL: Many happy returns of the day & The spirit of @Lyft lifts your spirits. 1. My only phone slid out of my pants' pocket during a Lyft ride this morning. Fortunately, Lyft has a "Help/Lost my phone" web page that I could access from my laptop.
Bill Atkinson, he of QuickDraw and MacPaint fame, has died at 74 of pancreatic cancer. news.ycombinator.com/item?id=4421...
Interesting to see LoadRunner is still alive. I haven't heard about LR anything in a long time, let alone LR Cloud. #load #test #performance www.linkedin.com/pulse/loadru...
