General host changes so the games stop doing work the Switch never did; frames and frame rate unchanged
(Mac A/B with the same routes, 11 games, no crash, red lines as before; dm/gfx/tests results as HEAD).
- Yield back-off: a run of SleepThread(0) with no other SVC sleeps an eighth of the wait after 200 us
(10-250 us; DM_YIELD_BACKOFF). Three Houses' frame limiter yielded 228k times a frame on the iPhone;
Mac CPU energy 3.5 W -> 0.5 W. BotW's PlacementMgr / RadarMgr spun the same way.
- SVC exit takes the global lock only while a pause is pending; a signalled event wakes only its
waiters; the audio renderer and upload / QueueFinish waits block instead of polling.
- Upload staging: each upload slot keeps its block (BotW allocated, made resident and freed a 32 MB
block per re-upload, ~3 GB/s); a re-uploaded texture alternates with a kept spare (movie frames,
Link's Awakening title: submit 1.64 -> 0.37 ms); the residency set skips repeated adds / removals;
copy parameters from the frame arena; host pre-writes unprotect page runs with one mprotect.
- Replay: per-thread memory-pool address cache, per-encoder state filter, GPU-only texture IDs stay
cached across guest writes, kept dirty-range handle per packaged texture. Instructions per draw:
TOTK -40%, Dread -32%, Odyssey -19%, 13 Sentinels -20%; replay kernel time BotW 1.3 -> 0.1 ms.
- Inline uniform updates inside a render pass are deferred to the pass end; later draws read a
shadow made of the deferred updates when they cover the bound range, else the pass ends first
(DM_NVN_UB_DEFER=0). Dread: 272 -> 26 passes a frame, GPU 8.3 -> 2.8 ms, CPU energy 1.2 -> 0.4 W.
- Whole-level format-changing copies do not load the destination.
- Measurement: [nvn] 功耗 (CPU energy W and mJ/frame, CPU, P-core share, wakeups, thermal state, top
yielders) and [nvn] 驻留集 (residency churn by source line, pass barriers, cuts, pass splits) every
300 frames; iOS thermal state and brightness. Opt-in switches for A/B: DM_RT=0, DM_NVN_BARRIER=game.
Docs: development.md Power section, 04 section 7 switches, 05 power lines, dm/gfx/README fixes.
seedds
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