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2 Commits

Author SHA1 Message Date
Peter Boyle 5c4574f9aa skills: add gpu-memory-performance.md
Documents the acceleratorThreads() default=2 trap, LambdaApply thread
mapping, coalescedRead/Write idiom, when to use __global__ vs
accelerator_for, and fused vs staged HBM access patterns.

Includes observed MI250X numbers from LatticePropagatorD reduction
(50 → 297 → 546 GB/s progression).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-21 12:34:30 -04:00
Peter Boyle 069f98b253 skills: HPC battle-hardening skill files for GPU+MPI correctness
Six skill files encoding expertise for making codebases robust on
problematic HPC systems, covering: correctness verification
(double-run, fingerprinting, flight recorder), hang diagnosis,
GPU runtime correctness (premature barrier, infinite poll),
MPI correctness on heterogeneous systems (device buffer aliasing,
AARCH64 PLT corruption, deterministic reductions),
compiler validation, and communication/computation overlap pipeline
design.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-21 12:34:30 -04:00