---
id: pr-vllm-17918
repo: vllm-project/vllm
pr: 17918
title: use ceil_div in cutlass block scaling shape check
author: IwakuraRein
date: '2025-05-16'
url: https://github.com/vllm-project/vllm/pull/17918
source_category: upstream-code
architectures:
- sm100
tags:
- fp8
- quantization
techniques: []
hardware_features:
- fp8
kernel_types:
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: e23564cb703916efef20d80fd1c32dd76dee0979
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/cutlass_benchmarks/w8a8_benchmarks.py
- csrc/quantization/cutlass_w8a8/c3x/scaled_mm_helper.hpp
- vllm/model_executor/layers/quantization/utils/fp8_utils.py
head_ref_oid: dada96332c50e595e1cd6d7eac6a58823f77e71e
artifact_dir: evidence/pull-bundles/vllm/gh-17918
---
# use ceil_div in cutlass block scaling shape check

- Repository: `vllm-project/vllm`
- PR: [17918](https://github.com/vllm-project/vllm/pull/17918)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/cutlass_benchmarks/w8a8_benchmarks.py`
- `csrc/quantization/cutlass_w8a8/c3x/scaled_mm_helper.hpp`
- `vllm/model_executor/layers/quantization/utils/fp8_utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-17918`
