---
id: pr-flashinfer-2352
repo: flashinfer-ai/flashinfer
pr: 2352
title: Added the cudnn backend Ragged KV Cache wrapper
author: Anerudhan
date: '2026-01-18'
url: https://github.com/flashinfer-ai/flashinfer/pull/2352
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- prefill
techniques: []
hardware_features: []
kernel_types:
- attention
- prefill
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 820cea14c81fb8c6e6ef4302c154385508989d07
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/README.md
- benchmarks/routines/attention.py
- benchmarks/routines/flashinfer_benchmark_utils.py
- flashinfer/prefill.py
- tests/attention/test_cudnn_prefill.py
- tests/attention/test_cudnn_prefill_deepseek.py
head_ref_oid: f6ca31b9c013fe60f895207bd7e425ccda62267c
artifact_dir: evidence/pull-bundles/flashinfer/gh-2352
---
# Added the cudnn backend Ragged KV Cache wrapper

- Repository: `flashinfer-ai/flashinfer`
- PR: [2352](https://github.com/flashinfer-ai/flashinfer/pull/2352)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/README.md`
- `benchmarks/routines/attention.py`
- `benchmarks/routines/flashinfer_benchmark_utils.py`
- `flashinfer/prefill.py`
- `tests/attention/test_cudnn_prefill.py`
- `tests/attention/test_cudnn_prefill_deepseek.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2352`
