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fix #225: stabilize render pacing and frame CPU

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Replace scheduler-quantized software sleeps with a reusable Windows high-resolution deadline timer, expose pacing in the frame profiler, and make shutdown wake every persistent mesh worker without losing the shared signal.

Preserve retail alpha order while using a stable radix, skip duplicate deferred-alpha SSBO packing, pack light sets, cache static selection descriptors, and retire historical material groups at the whole-frame boundary. The fixed dense-Caul sample improved from roughly 9-12 ms CPU to 5.3-6.2 ms without reducing visual quality.

Release build succeeds with zero warnings and all 6,300 tests pass with five intentional skips. Three independent retail, architecture, and adversarial reviews are clean; the post-review connected route remains pending because local ACE is offline.

Co-authored-by: OpenAI Codex <codex@openai.com>
This commit is contained in:
Erik 2026-07-19 06:29:30 +02:00
parent 47d7086a74
commit 3718e341be
17 changed files with 1103 additions and 225 deletions
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4
src/AcDream.App/Diagnostics/FrameProfiler.cs
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@ -16,6 +16,8 @@ public enum FrameStage
Upload = 1,
/// <summary>ImGui Render (dev overlay).</summary>
ImGui = 2,
/// <summary>Software presentation deadline wait (zero under VSync or uncapped mode).</summary>
Pacing = 3,
}
/// <summary>
@ -187,7 +189,7 @@ public sealed class FrameProfiler : IDisposable
sb.Append(" | gpu=off(wbdiag)");
sb.AppendFormat(ci, " | alloc_kb p50={0:0.0} max={1:0.0} gc={2}/{3}/{4}",
alloc.Percentile(0.50) / 1024.0, alloc.Max() / 1024.0, gc0, gc1, gc2);
string[] names = { "upd", "upl", "imgui" };
string[] names = { "upd", "upl", "imgui", "pace" };
for (int i = 0; i < stages.Length && i < names.Length; i++)
sb.AppendFormat(ci, " | {0} p50={1:0.0} p95={2:0.0}",
names[i], stages[i].Percentile(0.50) / 1000.0, stages[i].Percentile(0.95) / 1000.0);