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fix #425: pack resident budget is a 1080p ceiling that scales with pixel count; an explicit Apply retries a failed selection

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Live Holtburg at 2560x1440: the Low preset needed 67,368,164 resident bytes
(screen-sized HDR/depth/ray targets are 44 MB of that) against an absolute
64 MiB ceiling that had only been validated at 1080p, so Options -> Apply
fell back to the default path; every later Apply was then refused by the
controller's failure memo, which treated the user's deliberate choice like
automatic re-activation.

RenderPackResidentBudget.Effective scales the declared 1080p figure by the
viewport's pixel-count ratio (never below 1), still capped by the hardware
MaxPackResidentBytes; both pack graphs use it and the performance-matrix
tool judges its resident column by the same rule (contract test updated).
RenderPackController.Request gains explicitUserChoice, which clears the
memo for that selection; RenderPackSelectionBinding passes it on every
display edge (Apply, including resolution changes) and keeps the memo for
the startup request.

Tests: RenderPackResidentBudgetTests (1080p/720p keep the declared
ceiling, 1440p = 16/9x, 4K = 4x, hardware cap wins, zero extent rejected);
controller explicit-retry; the binding test now proves the user's next
Apply activates once the cause is gone. App hermetic lane 6,068/0 (Release).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Erik 2026-08-23 10:00:11 +02:00
parent 38def07edb
commit 132395e6f7
11 changed files with 250 additions and 8 deletions
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docs/plans/2026-08-21-atmospheric-rendering.md
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@ -739,7 +739,7 @@ CPU-submission-bound. Fullscreen work may occupy currently idle GPU time, but
it is not treated as free. Shadow cascades must protect the CPU submission
path.
| Preset | Incremental GPU p50 / p99 at 1080p | Incremental render-CPU p50 / p99 | Pack-owned resident GPU memory |
| Preset | Incremental GPU p50 / p99 at 1080p | Incremental render-CPU p50 / p99 | Pack-owned resident GPU memory **at 1080p** (scales with pixel count — `RenderPackResidentBudget.Effective`, #425) |
|---|---:|---:|---:|
| Low | ≤ 2.0 / 3.0 ms | ≤ 0.15 / 0.50 ms | ≤ 64 MiB |
| Medium | ≤ 3.25 / 4.50 ms | ≤ 0.25 / 0.75 ms | ≤ 128 MiB |