Neil Gunther
@DrQz
Performance analyst, rocket scientist & Xerox PARC alum 🇦🇺🇺🇸 Consulting Scientist, author, teacher and maybe some 🎸 performance too.
Guerrilla Capacity & Performance online classes offer some of the most powerful preparation techniques that can be applied across all platforms. perfdynamics.com/Classes/schedu…
GCAP Day 4. What you missed. ❥ Know your boundaries: ⁃ Linear bound (ideal parallelism) ⁃ Saturation bound (hello hockey-stick handle) ⁃ Optimal load point (the knee hurts) ❥ AWS performance model ⁃ Autoscaling side effects ⁃ Preemptive scheduling ⁃ Spot EC2 instances
GCAP Day 3. What you missed: ❥ How to present performance analysis results ❥ Example. Presenting a plot: Pass 1. Qualitative shape and features of curves Pass 2. Numerical alignment on axes and consistency Pass 3. Quantitative explanation of queueing effects
GCAP Day 2. What you missed: ❥ Guerrilla queues for those who can't wait. ❥ Parallel processing c.1900s — around the time of Agner Erlang.
GCAP day 1. What you missed: The advent of multicores c.2005 and the 5 GHz clock barrier. #performance
Is shortest-queue-first always the best scheduling policy? 🤔 #performance #management Def: A queue is a line of customers waiting to be severed perfdynamics.com/Manifesto/gcap…
New session times: 8am - 12pm PDT; 1700 - 2100 CET
Guerrilla Capacity Planning (GCAP) Online — EU Edition — registration is now OPEN Dates: July 21 through August 1, 2025 Times: 1500 - 1900 CET perfdynamics.com/Classes/schedu… Click on the DETAILS box (at the RHS) to register eventbrite.com/e/guerrilla-ca…
You do realize @forked_franz that you were born on Avogadro's number. (same as my father, btw) Definitely looks like the life of the party. 🎉🥂
Guerrilla Capacity Planning (GCAP) Online — EU Edition — registration is now OPEN Dates: July 21 through August 1, 2025 Times: 1500 - 1900 CET perfdynamics.com/Classes/schedu… Click on the DETAILS box (at the RHS) to register eventbrite.com/e/guerrilla-ca…
BTW @ae_bm , when you guys are finished burning down most of Spain, do you think you could ship some of that Med heat over here (NorCal)? We're barely hitting 21℃ by day and down to 10℃ at night. So much for summer🔥🧊 Kthx
I recently discovered the original 1992 paper where I first introduced the concept of barycentric coordinates for visualizing multiprocessor/multicore performance. perfdynamics.com/papers.pdf More modern renditions (animations) can be viewed here perfdynamics.com/Tools/tools.ht…
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. perfdynamics.com/Classes/schedu… #Performance #Training
Postscript: That sinking feeling when you realize 90% of your life is funneled through a 6"x3" piece of metal & silicon that has decided to escape from you, without permission.