Perf: quick checks — TAA under FSR, ssr_copy 2.1 ms, per-frame material texture scan #261

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opened 2026-10-03 02:34:27 +00:00 by sky_line · 1 comment

sky_line commented

2026-10-03 02:34:27 +00:00

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Measured at a Baltimare party (85 avatars, 4K, 5090, FSR native AA, RT shadows): ~47-54 FPS, GPU ~20 ms ≈ CPU main ~21 ms (balanced).

p_taa (0.73 ms) runs alongside p_fsr (1.24 ms) with FSR native AA selected — TAA should be skipped (or it's the glow resolve; verify).
ssr_copy timer reads 2.1 ms — far too much for a copy; find what lands in that window.
LLCleanRendererVK::uploadRealMaterialTextures ~7% of the main thread in a settled scene — likely scanning every frame; make it event-driven.
Minor: LLViewerObject::getExtraParameterEntry linear search (2.3%), LLVOAvatar::idleUpdateMisc map walks, writeWearablesToAvatar per frame.

Measured at a Baltimare party (85 avatars, 4K, 5090, FSR native AA, RT shadows): ~47-54 FPS, GPU ~20 ms ≈ CPU main ~21 ms (balanced). 1. p_taa (0.73 ms) runs alongside p_fsr (1.24 ms) with FSR native AA selected — TAA should be skipped (or it's the glow resolve; verify). 2. ssr_copy timer reads 2.1 ms — far too much for a copy; find what lands in that window. 3. LLCleanRendererVK::uploadRealMaterialTextures ~7% of the main thread in a settled scene — likely scanning every frame; make it event-driven. 4. Minor: LLViewerObject::getExtraParameterEntry linear search (2.3%), LLVOAvatar::idleUpdateMisc map walks, writeWearablesToAvatar per frame.

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2026-10-03 02:34:27 +00:00

sky_line referenced this issue

2026-10-04 02:46:29 +00:00

Later: investigate integrating AMD FSR 3.1 upscaler as an alternative to our TAA upscaler #191

sky_line added this to the Slipstream project

2026-10-06 15:04:14 +00:00

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