---
id: pr-sglang-21921
repo: sgl-project/sglang
pr: 21921
title: Add staging buffer CI test and documentation for heterogeneous TP
author: YAMY1234
date: '2026-04-06'
url: https://github.com/sgl-project/sglang/pull/21921
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: dc125afffbd585fd758a24de66f17b2fb2a9de91
inclusion_reason: defer
changed_paths:
- docs/advanced_features/pd_disaggregation.md
- docs/references/environment_variables.md
- python/sglang/srt/disaggregation/common/staging_buffer.py
- python/sglang/srt/disaggregation/common/staging_handler.py
- python/sglang/srt/disaggregation/decode.py
- python/sglang/srt/disaggregation/fake/conn.py
- python/sglang/srt/disaggregation/prefill.py
- test/registered/distributed/test_disaggregation_different_tp.py
artifact_dir: evidence/pull-bundles/sglang/gh-21921
head_ref_oid: c6cdd1d0f9a8009d9873a034524f3026059f5dc0
---
# Add staging buffer CI test and documentation for heterogeneous TP

- Repository: `sgl-project/sglang`
- PR: [21921](https://github.com/sgl-project/sglang/pull/21921)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `docs/advanced_features/pd_disaggregation.md`
- `docs/references/environment_variables.md`
- `python/sglang/srt/disaggregation/common/staging_buffer.py`
- `python/sglang/srt/disaggregation/common/staging_handler.py`
- `python/sglang/srt/disaggregation/decode.py`
- `python/sglang/srt/disaggregation/fake/conn.py`
- `python/sglang/srt/disaggregation/prefill.py`
- `test/registered/distributed/test_disaggregation_different_tp.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-21921`
