AnalysisOpinion / analysisHardware & Compute · Efficiency & Inference1 source · Oct 19, 2026

Open GPU kernel engineering series: naive GEMM to FlashAttention, H100 and Blackwell (44 sessions, code public) [P]

I'm building a free, code-first series on GPU kernel engineering and just published the intro and roadmap video.

Proof1 community thread

Key points

  • The core idea behind the series: for most ML workloads, kernel performance is a data-movement problem before it's a compute problem.
  • A kernel's position relative to the ridge point tells you whether to optimize memory access or compute.
  • Foundations: CPU parallelism, GPU architecture, roofline, first CUDA kernels
  • Hopper and Blackwell: TMA, WGMMA, CUTLASS, FP8/quantization, NVFP4, multi-GPU basics, FlashAttention 4, DeepSeek's kernels, AI-written kernels, capstone project

Sources (1)

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 18, 202672 hours, four big open weights drops. The only one that fits in 24GB came from NVIDIA, of all companies.
  2. Oct 18, 2026vllm-project/vllm v0.32.0
  3. Oct 16, 2026[Research] 2,788 tokens/s on a single RTX 5090 with a diffusion LLM — Introducing ORL (fully open source)
  4. Oct 16, 2026FuTransformer: FP8 prefill and INT4 decode for Llama-style inference on Hopper
  5. Oct 15, 2026QUASAR 4-bit QAT checkpoints for Qwen3.5, Gemma 4 and Muse Glimmer: closer to BF16 than Google’s and NVIDIA’s 4-bit releases
  6. Oct 15, 2026NVIDIA Nemotron 3.5 Super VL Powers Specialized Agents with Multimodal Reasoning

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