Files
foxhunt/crates
jgrusewski c1e1cd47f7 fix: dual-stream CUDA graph capture eliminates H100 hang
Split graph_forward into graph_forward_main (Pass 1+2+loss+backward
on main stream) and graph_forward_ddqn (Pass 3 on double_dqn_stream).

Event synchronization happens in ungraphed replay_forward() code,
not inside captured functions. Each graph uses its own CublasForward
handle — no set_stream() during capture.

Fixes: H100 training hang with gpu_n_episodes=4096.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-05 22:04:29 +02:00
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