---
id: pr-sglang-13573
repo: sgl-project/sglang
pr: 13573
title: '[BugFix] fix prefixcache performance and accuracy on ascend'
author: khalil2ji3mp6
date: '2025-12-07'
url: https://github.com/sgl-project/sglang/pull/13573
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 948b6acee802487725185ef3b3e402d38b41757b
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/hardware_backend/npu/attention/ascend_backend.py
- python/sglang/srt/managers/cache_controller.py
- python/sglang/srt/mem_cache/memory_pool_host.py
- test/srt/ascend/test_ascend_hicache_mla.py
- test/srt/run_suite.py
head_ref_oid: 39123283f09e633e20b8763654e3dd532be28f2c
artifact_dir: evidence/pull-bundles/sglang/gh-13573
---
# [BugFix] fix prefixcache performance and accuracy on ascend

- Repository: `sgl-project/sglang`
- PR: [13573](https://github.com/sgl-project/sglang/pull/13573)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/hardware_backend/npu/attention/ascend_backend.py`
- `python/sglang/srt/managers/cache_controller.py`
- `python/sglang/srt/mem_cache/memory_pool_host.py`
- `test/srt/ascend/test_ascend_hicache_mla.py`
- `test/srt/run_suite.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-13573`
