---
id: pr-vllm-30647
repo: vllm-project/vllm
pr: 30647
title: '[Perf] Eliminate padding and slicing op for GPT-OSS with Flashinfer MXFP4 MXFP8 MoE'
author: elvischenv
date: '2026-03-18'
url: https://github.com/vllm-project/vllm/pull/30647
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- fp8
- kernel-fusion
- moe
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
- fp8
kernel_types:
- moe
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 296839a1b07e63daecca67bfce80375614b5b863
inclusion_reason: kernel file changes
changed_paths:
- tests/compile/fusions_e2e/conftest.py
- tests/compile/fusions_e2e/models.py
- tests/compile/fusions_e2e/test_tp2_ar_rms.py
- vllm/model_executor/layers/fused_moe/fused_moe_method_base.py
- vllm/model_executor/layers/fused_moe/runner/default_moe_runner.py
- vllm/model_executor/layers/quantization/mxfp4.py
head_ref_oid: d195774ee43e4940db925c201649cc1c3a9ea136
artifact_dir: evidence/pull-bundles/vllm/gh-30647
---
# [Perf] Eliminate padding and slicing op for GPT-OSS with Flashinfer MXFP4 MXFP8 MoE

- Repository: `vllm-project/vllm`
- PR: [30647](https://github.com/vllm-project/vllm/pull/30647)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/compile/fusions_e2e/conftest.py`
- `tests/compile/fusions_e2e/models.py`
- `tests/compile/fusions_e2e/test_tp2_ar_rms.py`
- `vllm/model_executor/layers/fused_moe/fused_moe_method_base.py`
- `vllm/model_executor/layers/fused_moe/runner/default_moe_runner.py`
- `vllm/model_executor/layers/quantization/mxfp4.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-30647`
