---
id: pr-vllm-35290
repo: vllm-project/vllm
pr: 35290
title: '[Attention][Perf] Optimize cp_gather_and_upconvert_fp8_kv_cache - DeepSeek-v3.2'
author: LopezCastroRoberto
date: '2026-03-09'
url: https://github.com/vllm-project/vllm/pull/35290
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- fp8
techniques: []
hardware_features:
- fp8
kernel_types:
- attention
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 2b28b9b269e18cfe42c7e945d1da8d1c40989efa
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/kernels/bench_cp_gather_fp8.py
- csrc/cache_kernels.cu
- tests/kernels/test_cp_gather_fp8.py
head_ref_oid: f1ac4559f41f58f0c38eb3059ec95e8be78f1c64
artifact_dir: evidence/pull-bundles/vllm/gh-35290
---
# [Attention][Perf] Optimize cp_gather_and_upconvert_fp8_kv_cache - DeepSeek-v3.2

- Repository: `vllm-project/vllm`
- PR: [35290](https://github.com/vllm-project/vllm/pull/35290)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/kernels/bench_cp_gather_fp8.py`
- `csrc/cache_kernels.cu`
- `tests/kernels/test_cp_gather_fp8.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-35290`
