Reletter
Artwork for The Software Frontier

Where abstraction ends. Essays on GPU execution, kernel internals, and distributed systems at scale.

Platform
Substack
PricingFreemiumPublishesTwice weekly
Issues113Founded2 years agoLast Issue11 days ago
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Artwork for The Software Frontier

Latest Issues

When Batching Stops Working

Why does batching stop working? We solve the compute–memory crossover and find four GPU generations become memory-bound at just 84–162 tokens of context.

Introduction

11 days ago
4
Paid

Distilling in depth ROCm: How it Actually Works

AMD ships 2,905,048 tuned GEMM decisions in a public git repository. Zero of CDNA 4’s 75 matrix instructions exist on CDNA 5.

Introduction

14 days ago
4
Paid

Exploring how Triton actually compiles

Same source, same block sizes, same warp count. An integer the programmer never writes decides whether the loop is pipelined at all, and a second one decides whether you are on the tensor core.

Why was my kernel slower than an identical ke...

17 days ago
7
Paid

DeepSeek V4-Flash: The Cost of Deciding What to Read

I’ll show you seven numbers this piece derives

284.202 B ; reconstructed backbone against a published 284 B

39.3 % ; of activated parameters are attention, which is 1.74 percent of the weights

3.37 GiB ; of KV for a 1,048,576-token se...

a month ago
9
2

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Authors

The writers behind this newsletter.

  • Lorenzo Bradanini

    Self-taught software engineer skilled in data science, software engineering, ML, and cryptography, focused on developing innovative solutions to complex challenges.

  • Lorenzo Tettamanti

    BSc Physics student at the University of Milan. Interested in Machine Learning | Computational Physics | Artificial Intelligence | Physics Simulations

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