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ArcGraph: land the CUDA-graph capture lane — 3,961 -> 3.8 launch APIs/token, 10,114 -> 131 allocs/step - #205

Merged

heydryft merged 13 commits into

masterfrom

arcgraph/capture-lane-to-master

Aug 21, 2026

Merged

ArcGraph: land the CUDA-graph capture lane — 3,961 -> 3.8 launch APIs/token, 10,114 -> 131 allocs/step#205
heydryft merged 13 commits into
masterfrom
arcgraph/capture-lane-to-master

Commits on Aug 21, 2026
- fix(ArcGraph): Tensor::arange in the captured forward is a dangling HOST pointer
  heydryft
  committed
  c1d2b27
- fix(ArcGraph): the other three arange calls in the captured V4 forward
  heydryft
  committed
  64fe1d6
- fix(ArcGraph): BLOCKER 3 — the graph KV window is a ring, not a prefix
  heydryft
  committed
  fd1757b
- fix(ArcGraph): BLOCKER 2a — pin the retained raw tail so capture stops hitting an unwarmed alloc
  heydryft
  committed
  cc6b58d
- fix(ArcGraph): make the ring-slot remainder exact for non-power-of-two capacities
  heydryft
  committed
  37cdc77
- test(ArcGraph): measurement runner for the replay-correctness legs
  heydryft
  committed
  b491233
- diag(ArcGraph): mark each of the five driver calls in end_capture_and_cache
  
  Nirupam Bhowmick
  authored and
  heydryft
  committed
  dd37d75
- diag(ArcGraph): stop swallowing the warm-pass sync, and prove whether the context is poisoned before the graph runs
  
  Nirupam Bhowmick
  authored and
  heydryft
  committed
  e38b01d
- test(ArcGraph): same-step probe proves the graph is wired right; count replays
  
  heydryft
  and
  claude
  committed
  27ff76a
- test(ArcGraph): bisect the replay divergence to layer 0's interior
  
  heydryft
  and
  claude
  committed
  d54e521
- test(ArcGraph): the WRONG KEY is written, not the wrong window read
  
  heydryft
  and
  claude
  committed
  9d9b324
- fix(ArcGraph): rebase hygiene — warnings, rustfmt, typos, and the helper #206 orphaned
  
  heydryft
  and
  claude
  committed
  6fcb87f
- docs(ArcAttention): repoint wave65-CQ's citations at the helper that replaces the one this PR removes
  
  heydryft
  and
  claude
  committed
  2aadcee

Commits

Commits on Aug 21, 2026