---
id: pr-vllm-12850
repo: vllm-project/vllm
pr: 12850
title: Optimize moe_align_block_size for deepseek_v3
author: mgoin
date: '2025-02-13'
url: https://github.com/vllm-project/vllm/pull/12850
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 2344192a55022d84ba3bb8d33b1ec38724f54fed
inclusion_reason: kernel file changes
changed_paths:
- csrc/moe/moe_align_sum_kernels.cu
- vllm/model_executor/layers/fused_moe/fused_moe.py
head_ref_oid: 62802f3b3cff93b479d9312ff0fc5629db90d374
artifact_dir: evidence/pull-bundles/vllm/gh-12850
---
# Optimize moe_align_block_size for deepseek_v3

- Repository: `vllm-project/vllm`
- PR: [12850](https://github.com/vllm-project/vllm/pull/12850)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/moe/moe_align_sum_kernels.cu`
- `vllm/model_executor/layers/fused_moe/fused_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-12850`
