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[diffusion] doc: sync CFG and tracing documentation (#39883)

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Co-authored-by: Mick Qian <mickqian@users.noreply.github.com>
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Mick
2026-09-18 18:03:40 +08:00
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co-authored by Mick Qian
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docs/cookbook/diffusion/SANA-WM/SANA-WM.mdx
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@@ -192,7 +192,7 @@ Notes on launch behavior:
- **Default endpoint** is `127.0.0.1:30000` (`--host` / `--port` override).
- **CPU offload flags are optional.** `--dit-cpu-offload`, `--text-encoder-cpu-offload`, and `--image-encoder-cpu-offload` are available; defaults are auto-adjusted from GPU memory (GPUs under 30 GB get more aggressive offloading).
- **Multi-GPU realtime.** Prefer explicit sequence parallelism (`--sp-degree` equal to the number of GPUs for a single session). Do not enable CFG parallel for the realtime profile: the default realtime request uses `guidance_scale=1.0`, while CFG parallel requires active cond/uncond branches.
- **Multi-GPU realtime.** Prefer explicit sequence parallelism (`--sp-degree` equal to the number of GPUs for a single session). Do not enable CFG parallel for the realtime profile: the default request uses `guidance_scale=1.0`, so the extra CFG ranks only recompute the same branch.
- **FSDP.** Use `--use-fsdp-inference` only when you specifically need weight sharding for memory. For the low-latency realtime profile, prefer keeping components resident and using SP first.
- **Warmup.** Server warmup is **automatically skipped** for the realtime pipeline — a synthetic warmup request has no WebSocket session, so the server detects the registered realtime adapter and skips it. No explicit `--warmup-mode` setting is needed.