---
id: pr-vllm-21968
repo: vllm-project/vllm
pr: 21968
title: '[Feature] Add `VLLM_USE_DEEP_GEMM_E8M0` Env to Control E8M0 Scale'
author: yewentao256
date: '2025-08-11'
url: https://github.com/vllm-project/vllm/pull/21968
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: f7dcce7a4aabb1445c2827ac5d978a9c5e18be30
inclusion_reason: defer
changed_paths:
- tests/kernels/moe/test_block_fp8.py
- tests/kernels/moe/test_deepep_deepgemm_moe.py
- vllm/envs.py
- vllm/model_executor/layers/fused_moe/batched_deep_gemm_moe.py
- vllm/model_executor/layers/fused_moe/fused_moe.py
- vllm/model_executor/layers/fused_moe/triton_deep_gemm_moe.py
- vllm/model_executor/layers/quantization/fp8.py
- vllm/model_executor/layers/quantization/utils/fp8_utils.py
- vllm/utils/deep_gemm.py
artifact_dir: evidence/pull-bundles/vllm/gh-21968
head_ref_oid: 47fe7c92e7bce1256c8adb6b78da06c6c5549223
---
# [Feature] Add `VLLM_USE_DEEP_GEMM_E8M0` Env to Control E8M0 Scale

- Repository: `vllm-project/vllm`
- PR: [21968](https://github.com/vllm-project/vllm/pull/21968)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `tests/kernels/moe/test_block_fp8.py`
- `tests/kernels/moe/test_deepep_deepgemm_moe.py`
- `vllm/envs.py`
- `vllm/model_executor/layers/fused_moe/batched_deep_gemm_moe.py`
- `vllm/model_executor/layers/fused_moe/fused_moe.py`
- `vllm/model_executor/layers/fused_moe/triton_deep_gemm_moe.py`
- `vllm/model_executor/layers/quantization/fp8.py`
- `vllm/model_executor/layers/quantization/utils/fp8_utils.py`
- `vllm/utils/deep_gemm.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21968`
