 Command

Sam Foreman's personal site. Vim-style keybinds for navigation; theme + font pickers below.

Theme
 Font Body Code
Reader
Keybinds
Navigation
j / ↓ Next item k / ↑ Previous item g First item in region G Last item in region zz Center focused item h / l Move left/right region ] / [ Next/previous heading } / { Next/previous block d / u Half-page down/up
Layout
<zh> / <zl> Toggle left/right sidebar <zr> Toggle reader view <zj> / <zk> Focus main/navbar <S-h/j/k/l> Focus left/main/navbar/right ⌃H / ⌃L Focus left/right sidebar ⌃J / ⌃K Focus main/navbar ⇧C / ⇧E Collapse / expand all sections
Dialogs
⌃P / : Command palette ⌃X Theme picker / Search ? Show keybinds Esc / ⌃C Close dialog
History
n Next document b Previous document ⌃O History back ⌃I History forward
 Search
ideas: 💡 Ideas more: ➕ More now: Now about/more: 🪪 More posts: 📬 Posts about: Sam Foreman talks: 🎙️ Talks projects: 📚 Projects webtui: Style posts/2025: 📆 2025 posts/ai-for-physics: ⚛️ AI for Physics posts/dope-slides: 💅 How to Make Dope Slides posts/jupyter: 📗 Jupyter posts/ezpz-at-alcf: 🍋 ezpz @ ALCF posts/resume: 🧑🏻‍💻 Sam Foreman’s Résumé posts/ezpz-v1: 📝 ezpz-v1 posts/svgbob: 🫥 svgbob posts/torchtune-patch-aurora: 🚑 Torchtune Patch on Aurora posts/torchtune-aurora: 🪛 Torchtune on Aurora posts/auroragpt: 🤖 AuroraGPT talks/ai-for-science-2024: Parallel Training Methods talks/alcf-hpc-workshop-2024/alcf-hpc-workshop-2024: Deep Learning and Foundation Models at Scale talks/auroragpt-siam25: AuroraGPT talks/hpc-user-forum/auroragpt: AuroraGPT talks/aurora-gpt-fm-for-electric-grid/auroragpt-fm-for-electric-grid: AuroraGPT: Foundation Models for Science talks/incite-hackathon-2025: ALCF Incite Hackathon 2025 talks/demo-slides: AuroraGPT: Training Foundation Models on Supercomputers talks/llms-at-scale: Training LLMs at Scale talks/llms-on-polaris: Training LLMs on Polaris talks/openskai25: Open SkAI2025 webtui/components/accordion: Accordion webtui/components/badge: Badge webtui/components/button: Button webtui/components/dialog: Dialog webtui/components/checkbox: Checkbox webtui/components/input: Input webtui/components/popover: Popover webtui/components/pre: Pre webtui/components/progress: Progress webtui/components/radio: Radio webtui/components/range: Range webtui/components/separator: Separator webtui/components/spinner: Spinner webtui/components/switch: Switch webtui/components/textarea: Textarea webtui/components/tooltip: Popover webtui/components/typography: Typography webtui/components/table: Table webtui/components/view: View webtui/contributing/contributing: Contributing webtui/contributing/contributing: ## Local Development webtui/contributing/contributing: ## Issues webtui/contributing/contributing: ## Pull Requests webtui/contributing/style-guide: Style Guide webtui/contributing/style-guide: ## CSS Units webtui/contributing/style-guide: ## Selectors webtui/contributing/style-guide: ## Documentation webtui/plugins/plugin-dev: Developing Plugins webtui/plugins/plugin-dev: ### Style Layers webtui/plugins/plugin-nf: Nerd Font Plugin webtui/plugins/theme-catppuccin: Catppuccin Theme webtui/plugins/theme-custom: Custom Theme webtui/plugins/theme-gruvbox: Gruvbox Theme webtui/plugins/theme-nord: Nord Theme webtui/plugins/theme-everforest: Everforest Theme webtui/plugins/theme-vitesse: Vitesse Theme webtui/installation/astro: Astro webtui/installation/astro: ## Scoping webtui/installation/astro: ### Frontmatter Imports webtui/installation/astro: ### ‹style› tag webtui/installation/astro: ### Full Library Import webtui/installation/nextjs: Next.js webtui/start/ascii-boxes: ASCII Boxes webtui/start/installation: Installation webtui/start/installation: ## Installation webtui/start/installation: ## Using CSS webtui/start/installation: ## Using ESM webtui/start/installation: ## Using a CDN webtui/start/installation: ## Full Library Import webtui/start/installation: ### CSS webtui/start/installation: ### ESM webtui/start/installation: ### CDN webtui/start/changelog: Changelog webtui/start/intro: Introduction webtui/start/intro: ## Features webtui/installation/vite: Vite webtui/start/plugins: Plugins webtui/start/plugins: ## Official Plugins webtui/start/plugins: ### Themes webtui/start/plugins: ## Community Plugins webtui/start/theming: Theming webtui/start/theming: ## CSS Variables webtui/start/theming: ### Font Styles webtui/start/theming: ### Colors webtui/start/theming: ### Light & Dark webtui/start/theming: ## Theme Plugins webtui/start/theming: ### Using Multiple Theme Accents webtui/start/tuis-vs-guis: TUIs vs GUIs webtui/start/tuis-vs-guis: ## Monospace Fonts webtui/start/tuis-vs-guis: ## Character Cells posts/2025/06: 06 posts/ai-for-physics/diffusion: 🎲 MCMC + Diffusion Sampling posts/ai-for-physics/l2hmc-qcd: 🎢 L2HMC for LQCD posts/auroragpt/aurora-gpt: 🏎️ Megatron-DeepSpeed on Intel XPU posts/auroragpt/determinstic-flash-attn/deterministic-flash-attn: 🎰 Deterministic `flash-attn` posts/auroragpt/checkpoints: 💾 Converting Checkpoints posts/auroragpt/long-sequences: 🚂 Loooooooong Sequence Lengths posts/auroragpt/flash-attn-sunspot: 📸 `flash-attn` on Sunspot posts/auroragpt/mpi4py-reproducer: 🐛 `mpi4py` bug on Sunspot posts/auroragpt/spike-skipper: 🏔️ Spike Skipper posts/auroragpt/startup-times: 🐢 Starting Up Distributed Training on Aurora posts/auroragpt/startup-times: ## Response posts/auroragpt/startup-times: ### Measuring / Calculating Startup Time posts/auroragpt/startup-times: ## Minimal Working Example posts/jupyter/l2hmc-4dsu3: 🔳 `l2hmc-qcd` Example: 4D SU(3) posts/jupyter/test: 🏁 `l2hmc` Example: 2D $U(1)$ talks/incite-hackathon-2025/auroragpt: LLMs on Aurora: Overview talks/auroragpt/alcf-hpc-workshop-2024/auroragpt-alcf-hands-on-hpc-workshop-2024: AuroraGPT: ANL's General Purpose Scientific LLM talks/openskai25/ai4science: Scientific AI at Scale: AuroraGPT talks/incite-hackathon-2025/ezpz: LLMs on Aurora: Hands-On posts/2025/04/28: 🔥 Building PyTorch 2.6 from Source on Aurora posts/2025/05/03: 🚧 Frameworks Issue with numpy \› 2 talks/openskai25/training: Scientific AI at Scale: Distributed Training posts/2025/06/01: 📰 Nice Headings posts/2025/06/14: 🏗️ Building PyTorch 2.8 from Source on Aurora posts/2025/06/02: 🧜‍♀️ Mermaid posts/2025/09/12: 🍹 BlendCorpus + TorchTitan @ ALCF posts/2025/09/17: 📊 `pbs-tui`: TUI for PBS Job Scheduler Monitoring posts/2025/10/06: 🎨 Mixing Between Distributions While Training posts/2026/01/07: 🎉 Happy New Year! posts/2026/01/10: 🍋 ezpz: distributed PyTorch across any hardware posts/2025/11/12: 🧊 Cooling Down Checkpoints: Best Practices for Model Evaluation posts/2026/02/28: ⏱️ Comparing Launchers on Aurora posts/2026/02/28: ## torchrun posts/2026/02/28: ## ezpz posts/2026/04/27: Pre-Training AuroraGPT with TorchTitan posts/2026/04/27: ## Two-Week Summary (Apr 12–27, 2026) posts/2026/04/27: ## Detailed Breakdown posts/2026/04/27: ### Week 1: Apr 12–18 — Benchmarking, LR Finder, XPU Fixes posts/2026/04/27: #### Benchmarking (Apr 12–15) posts/2026/04/27: #### LR Finder (Apr 12–14) posts/2026/04/27: #### Scaling Study (Apr 12) posts/2026/04/27: #### Upstream Syncs (Apr 12–18, syncs 6–14) posts/2026/04/27: #### XPU Bug Fixes (Apr 18) posts/2026/04/27: #### RL Experiment (Apr 18) posts/2026/04/27: ### Week 1.5: Apr 18–25 — Production Readiness posts/2026/04/27: #### Torch 2.12 Benchmarks (Apr 18) posts/2026/04/27: #### LR Finder Extensions (Apr 20–21) posts/2026/04/27: #### XPU Fixes (Apr 23) posts/2026/04/27: #### Torch 2.13 Environment (Apr 25) posts/2026/04/27: #### 2B Scaling Study on Torch 2.13 (Apr 25) posts/2026/04/27: #### Production Training (Apr 25) posts/2026/04/27: ### Week 2: Apr 26–27 — Optimizer Competition posts/2026/04/27: #### RL Multi-Task Refactor (Apr 26) posts/2026/04/27: #### Docs Reorganization (Apr 26) posts/2026/04/27: #### Generic HF Dataset Streaming (Apr 26) posts/2026/04/27: #### New Optimizers (Apr 26) posts/2026/04/27: #### Architecture Tweaks (Apr 26–27) posts/2026/04/27: ## Competition Results posts/2026/04/27: ### Round 1–3: Speedrun — 2N, GBS=48, 1000 steps posts/2026/04/27: ### 10B Full Training — 8N, GBS=384, ~3,178 steps posts/2026/04/27: ### Round 4: Reproducible Speedrun — 2N, GAS=8, GBS=384, 1000 steps posts/2026/04/27: ## Key Discoveries posts/2026/04/27: ## Infrastructure Built posts/2026/04/27: ## High-Level posts/2026/04/27: ## Detailed Breakdown posts/2026/04/27: ### Week 1: Apr 12–18 — Benchmarking, LR Finder, XPU Fixes posts/2026/04/27: #### Benchmarking (Apr 12–15) posts/2026/04/27: #### LR Finder (Apr 12–14) posts/2026/04/27: #### Scaling Study (Apr 12) posts/2026/04/27: #### Upstream Syncs (Apr 12–18, syncs 6–14) posts/2026/04/27: #### XPU Bug Fixes (Apr 18) posts/2026/04/27: #### RL Experiment (Apr 18) posts/2026/04/27: ### Week 1.5: Apr 18–25 — Production Readiness posts/2026/04/27: #### Torch 2.12 Benchmarks (Apr 18) posts/2026/04/27: #### LR Finder Extensions (Apr 20–21) posts/2026/04/27: #### XPU Fixes (Apr 23) posts/2026/04/27: #### Torch 2.13 Environment (Apr 25) posts/2026/04/27: #### 2B Scaling Study on Torch 2.13 (Apr 25) posts/2026/04/27: #### Production Training (Apr 25) posts/2026/04/27: ### Week 2: Apr 26–27 — Optimizer Competition posts/2026/04/27: #### RL Multi-Task Refactor (Apr 26) posts/2026/04/27: #### Docs Reorganization (Apr 26) posts/2026/04/27: #### Generic HF Dataset Streaming (Apr 26) posts/2026/04/27: #### New Optimizers (Apr 26) posts/2026/04/27: #### Architecture Tweaks (Apr 26–27) posts/2026/04/27: ## Competition Results posts/2026/04/27: ### Round 1–3: 1000-step speedruns, 2 nodes, GBS=48 (17 configs) posts/2026/04/27: ### Round 4 (10B full training, 8 nodes, GBS=384, 5 configs) posts/2026/04/27: ### Round 5 (2 nodes, GAS=8, GBS=384, local dataset, 8 configs — in progress) posts/2026/04/27: ## Key Discoveries posts/2026/04/27: ## Infrastructure Built posts/2026/06/27: Local AI Apps on ALCF: Argo, Inference Endpoints, and One Gateway posts/2026/06/28: Migrating from Quarto to Astro: samforeman.me → samf.sh posts/2026/05/01: Running 50k Python Processes on Aurora with ezpz yeet posts/ai-for-physics/l2hmc-qcd/2du1: 🎢 l2hmc-qcd Example: 2D U(1) talks/2025/10/08: AERIS: Argonne's Earth Systems Model talks/2025/10/24: Training Foundation Models on Supercomputers talks/2025/09/24: Training Foundation Models on Supercomputers posts/jupyter/l2hmc/4dsu3: 🔳 l2hmc-qcd Example: 4D SU(3) posts/ai-for-physics/l2hmc-qcd/4dsu3nb/index-broken: 🕸️ l2hmc-qcd Example: 4D SU(3) talks/2025/10/15: Training Foundation Models on Supercomputers talks/2025/12/16: AuroraGPT: Training Foundation Models on Supercomputers talks/2026/06/03: Production Pre-Training at Scale: The Good, the Bad, and the Restarts posts/drafts/2025/09/22: 📝 2025 Annual Report talks/2026/07/14: Pre-Training AuroraGPT at Scale on Aurora talks/2026/08/03: Pre-Training LLMs on a Supercomputer
 Theme Current: Light j/k or ↑/↓ + Enter

🎢 L2HMC for LQCD

Sam Foreman Dec 1, 2023 12/01/23 updated: Aug 6, 2026 08/06/26 1 min read ai-for-physics
󰈤
Overview of the L2HMC framework applied to lattice QCD simulations.
 samf.sh / posts / ai-for-physics / l2hmc-qcd · Top 1:1