---
id: pr-tensorrt-llm-11733
repo: NVIDIA/TensorRT-LLM
pr: 11733
title: '[https://nvbugs/5799917][fix] Recover from CUTLASS MoE doActivation perf regression for MXFP4/NVFP4 dtype'
author: rosenrodt
date: '2026-02-26'
url: https://github.com/NVIDIA/TensorRT-LLM/pull/11733
source_category: upstream-code
architectures:
- sm100
tags:
- gemm_quant
- moe_routing
- mxfp4
techniques:
- fine-grained-quantization
hardware_features:
- fp4
- mxfp4
- nvfp4
kernel_types:
- gemm
- moe
languages:
- cuda-cpp
- cute-dsl
captured_at: '2026-05-16'
status: merged
merge_sha: aa5e1d9fe8d1f83f7f61452d53d5d72bdf3b3d71
inclusion_reason: Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.
changed_paths:
- cpp/tensorrt_llm/kernels/cutlass_kernels/moe_gemm/moe_kernels.cu
artifact_dir: evidence/pull-bundles/tensorrt-llm/gh-11733
head_ref_oid: 3ebc52392eba9d2c4e2cc5426462523ca22b8a67
---
# [https://nvbugs/5799917][fix] Recover from CUTLASS MoE doActivation perf regression for MXFP4/NVFP4 dtype

- Repository: `NVIDIA/TensorRT-LLM`
- PR: [11733](https://github.com/NVIDIA/TensorRT-LLM/pull/11733)
- Decision: `Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.`
- Reason: Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.

## Changed Paths

- `cpp/tensorrt_llm/kernels/cutlass_kernels/moe_gemm/moe_kernels.cu`

## Evidence Bundle

`evidence/pull-bundles/tensorrt-llm/gh-11733`
