---
id: pr-sglang-22869
repo: sgl-project/sglang
pr: 22869
title: '[diffusion] feat: introduce ltx-2-two-stage device manager'
author: mickqian
date: '2026-04-18'
url: https://github.com/sgl-project/sglang/pull/22869
source_category: upstream-code
architectures:
- sm90
tags:
- benchmark_test
- hopper
techniques:
- kernel-fusion
- pipeline-stages
hardware_features:
- hopper
kernel_types:
- sampling
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 0d94c3366ad684b376f6ebfaa0d8d3657f53302c
inclusion_reason: Mine shape sets, tolerance rules, warmup logic, and profile commands before mutating code.
changed_paths:
- docs/diffusion/compatibility_matrix.md
- python/sglang/multimodal_gen/runtime/pipelines/ltx_2_pipeline.py
- python/sglang/multimodal_gen/runtime/pipelines_core/lora_pipeline.py
- python/sglang/multimodal_gen/runtime/pipelines_core/stages/denoising_av.py
- python/sglang/multimodal_gen/runtime/pipelines_core/stages/ltx_2_denoising.py
- python/sglang/multimodal_gen/runtime/pipelines_core/stages/upsampling.py
- python/sglang/multimodal_gen/runtime/server_args.py
- python/sglang/multimodal_gen/test/server/gpu_cases.py
artifact_dir: evidence/pull-bundles/sglang/gh-22869
head_ref_oid: 87a5c55092f7154a557707d14f7949a7f3a2ac95
---
# [diffusion] feat: introduce ltx-2-two-stage device manager

- Repository: `sgl-project/sglang`
- PR: [22869](https://github.com/sgl-project/sglang/pull/22869)
- Decision: `Mine shape sets, tolerance rules, warmup logic, and profile commands before mutating code.`
- Reason: Mine shape sets, tolerance rules, warmup logic, and profile commands before mutating code.

## Changed Paths

- `docs/diffusion/compatibility_matrix.md`
- `python/sglang/multimodal_gen/runtime/pipelines/ltx_2_pipeline.py`
- `python/sglang/multimodal_gen/runtime/pipelines_core/lora_pipeline.py`
- `python/sglang/multimodal_gen/runtime/pipelines_core/stages/denoising_av.py`
- `python/sglang/multimodal_gen/runtime/pipelines_core/stages/ltx_2_denoising.py`
- `python/sglang/multimodal_gen/runtime/pipelines_core/stages/upsampling.py`
- `python/sglang/multimodal_gen/runtime/server_args.py`
- `python/sglang/multimodal_gen/test/server/gpu_cases.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-22869`
