The graph was captured at step 2 with PER nearly empty (2048/65536
entries). PER fills at step 64 (65536/1024). The captured graph baked
empty-PER kernel behavior — once PER filled, sps dropped from 338→7.
Now: warmup runs eagerly for per_capacity/b_size + 2 steps (66 steps).
Capture happens at step 67 when PER is full and all kernel behaviors
are in steady state.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
d8247034f8