EngineX/xc-llm-ascend
3
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[BugFix][v0.18.0] Gate recompute/balance/fused_mc2 by PD mode (#8374)

Browse Source 
<!--  Thanks for sending a pull request!

BEFORE SUBMITTING, PLEASE READ
https://docs.vllm.ai/en/latest/contributing/overview.html

-->
### What this PR does / why we need it?
- Enforce recompute scheduler only in PD-disaggregated mode.
- Enforce balance scheduling only in PD-mixed mode.
- Enforce fused MC2 only on PD-disaggregated D-side (kv_consumer).
<!--
- Please clarify what changes you are proposing. The purpose of this
section is to outline the changes and how this PR fixes the issue.
If possible, please consider writing useful notes for better and faster
reviews in your PR.

- Please clarify why the changes are needed. For instance, the use case
and bug description.

- Fixes #
-->

### Does this PR introduce _any_ user-facing change?
No
<!--
Note that it means *any* user-facing change including all aspects such
as API, interface or other behavior changes.
Documentation-only updates are not considered user-facing changes.
-->

### How was this patch tested?
By ci
<!--
CI passed with new added/existing test.
If it was tested in a way different from regular unit tests, please
clarify how you tested step by step, ideally copy and paste-able, so
that other reviewers can test and check, and descendants can verify in
the future.
If tests were not added, please describe why they were not added and/or
why it was difficult to add.
-->

---------

Signed-off-by: wangxiaoteng <wangxiaoteng@huawei.com>
This commit is contained in:
wangxiaoteng888
2026-04-18 18:06:42 +08:00
committed by GitHub
parent c995a959e6
commit 363febb6cb
5 changed files with 288 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
vllm_ascend/envs.py
View File

@@ -93,7 +93,9 @@ env_variables: dict[str, Callable[[], Any]] = {
"VLLM_ASCEND_ENABLE_CONTEXT_PARALLEL": lambda: bool(int(os.getenv("VLLM_ASCEND_ENABLE_CONTEXT_PARALLEL", "0"))),
# Whether to anbale dynamic EPLB
"DYNAMIC_EPLB": lambda: os.getenv("DYNAMIC_EPLB", "false").lower(),
# Whether to enable fused mc2(`dispatch_gmm_combine_decode`/`dispatch_ffn_combine` operator)
# Whether to enable fused MC2 (`dispatch_gmm_combine_decode` / `dispatch_ffn_combine`).
# Platform validation: only PD-disaggregated **decode** instances (`kv_role='kv_consumer'`).
# Not supported in PD-mixed mode (`kv_both` or no kv_transfer_config) or on prefill nodes (`kv_producer`).
# 0, or not set: default ALLTOALL and MC2 will be used.
# 1: ALLTOALL and MC2 might be replaced by `dispatch_ffn_combine` operator.
# `dispatch_ffn_combine` can be used only for moe layer with W8A8, EP<=32, non-mtp, non-dynamic-eplb.
@@ -101,7 +103,9 @@ env_variables: dict[str, Callable[[], Any]] = {
# `dispatch_gmm_combine_decode` can be used only for **decode node** moe layer
# with W8A8. And MTP layer must be W8A8.
"VLLM_ASCEND_ENABLE_FUSED_MC2": lambda: int(os.getenv("VLLM_ASCEND_ENABLE_FUSED_MC2", "0")),
# Whether to anbale balance scheduling
# Whether to enable balance scheduling in the v1 scheduler.
# Platform validation: only PD-mixed mode (`kv_role='kv_both'` or no kv_transfer_config).
# Not supported in PD-disaggregated mode (`kv_producer` / `kv_consumer` only).
"VLLM_ASCEND_BALANCE_SCHEDULING": lambda: bool(int(os.getenv("VLLM_ASCEND_BALANCE_SCHEDULING", "0"))),
# use fused op transpose_kv_cache_by_block, default is True
"VLLM_ASCEND_FUSION_OP_TRANSPOSE_KV_CACHE_BY_BLOCK": lambda: bool(