---
id: pr-vllm-19110
repo: vllm-project/vllm
pr: 19110
title: '[Hardware][NVIDIA] FP4 MoE kernel optimization'
author: dubcyfor3
date: '2025-06-05'
url: https://github.com/vllm-project/vllm/pull/19110
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- moe
- nvfp4
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
- nvfp4
kernel_types:
- moe
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 61059bee40511b6f6c044053cf921da81cf89985
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/kernels/benchmark_cutlass_fp4_moe.py
- csrc/moe/moe_ops.h
- csrc/moe/moe_permute_unpermute_op.cu
- csrc/moe/permute_unpermute_kernels/dispatch.h
- csrc/moe/torch_bindings.cpp
- csrc/ops.h
- csrc/quantization/cutlass_w8a8/moe/moe_data.cu
- csrc/quantization/cutlass_w8a8/scaled_mm_entry.cu
- csrc/torch_bindings.cpp
- tests/kernels/moe/test_nvfp4_moe.py
- vllm/_custom_ops.py
- vllm/model_executor/layers/fused_moe/cutlass_moe.py
head_ref_oid: fabee1d4c13dc8b8e9c7e994dfeb1fb977fcb2c1
artifact_dir: evidence/pull-bundles/vllm/gh-19110
---
# [Hardware][NVIDIA] FP4 MoE kernel optimization

- Repository: `vllm-project/vllm`
- PR: [19110](https://github.com/vllm-project/vllm/pull/19110)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/kernels/benchmark_cutlass_fp4_moe.py`
- `csrc/moe/moe_ops.h`
- `csrc/moe/moe_permute_unpermute_op.cu`
- `csrc/moe/permute_unpermute_kernels/dispatch.h`
- `csrc/moe/torch_bindings.cpp`
- `csrc/ops.h`
- `csrc/quantization/cutlass_w8a8/moe/moe_data.cu`
- `csrc/quantization/cutlass_w8a8/scaled_mm_entry.cu`
- `csrc/torch_bindings.cpp`
- `tests/kernels/moe/test_nvfp4_moe.py`
- `vllm/_custom_ops.py`
- `vllm/model_executor/layers/fused_moe/cutlass_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-19110`
