[Core] Fix block table shape to make Prefix cache work with Ascend scheduler #1446

yiz-liu · 2025-06-26T06:44:10Z

What this PR does / why we need it?

This fix the shape of block_table which was introduced by hybrid kv groups several weeks ago.

Error will be raised when enable prefix-cache (eager or not) and Ascend Scheduler at the same time, just send two identical requests and it will reproduce.

v0.9.1: #1297

Does this PR introduce any user-facing change?

No

How was this patch tested?

Test manually

Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>

codecov · 2025-06-26T07:22:23Z

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 27.41%. Comparing base (c30ddb8) to head (a37cce9).
⚠️ Report is 584 commits behind head on main.

Files with missing lines	Patch %	Lines
vllm_ascend/attention/attention_v1.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1446      +/-   ##
==========================================
+ Coverage   27.39%   27.41%   +0.01%     
==========================================
  Files          56       56              
  Lines        6191     6271      +80     
==========================================
+ Hits         1696     1719      +23     
- Misses       4495     4552      +57

Flag	Coverage Δ
unittests	`27.41% <0.00%> (+0.01%)`	⬆️

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MengqingCao · 2025-06-28T10:24:16Z

Add e2e test in #1505

…heduler (vllm-project#1446) ### What this PR does / why we need it? This fix the shape of block_table which was introduced by hybrid kv groups several weeks ago. Error will be raised when enable prefix-cache (eager or not) and Ascend Scheduler at the same time, just send two identical requests and it will reproduce. v0.9.1: vllm-project#1297 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Test manually Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>

…uler (#1505) ### What this PR does / why we need it? Add test for chunked prefill and prefix cache on v1/AscendScheduler Covered scenarios: - `Qwen/Qwen3-0.6B-Base` and `deepseek-ai/DeepSeek-V2-Lite-Chat` --- multicard CI time increased by 19 min - `V1 + default scheduler` vs `V1 + default scheduler + enable prefix cache` - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable prefix cache` vs `V1 + Ascend scheduler + enable prefix cache + enable chunked prefill` - `Qwen/Qwen3-0.6B-Base` --- singlecard CI time increased by 8 min - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable chunked prefill` should rebase after #1498 and #1446 ### Does this PR introduce _any_ user-facing change? N/A ### How was this patch tested? CI passed with new added test. Signed-off-by: MengqingCao <cmq0113@163.com>

…uler (vllm-project#1505) ### What this PR does / why we need it? Add test for chunked prefill and prefix cache on v1/AscendScheduler Covered scenarios: - `Qwen/Qwen3-0.6B-Base` and `deepseek-ai/DeepSeek-V2-Lite-Chat` --- multicard CI time increased by 19 min - `V1 + default scheduler` vs `V1 + default scheduler + enable prefix cache` - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable prefix cache` vs `V1 + Ascend scheduler + enable prefix cache + enable chunked prefill` - `Qwen/Qwen3-0.6B-Base` --- singlecard CI time increased by 8 min - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable chunked prefill` should rebase after vllm-project#1498 and vllm-project#1446 ### Does this PR introduce _any_ user-facing change? N/A ### How was this patch tested? CI passed with new added test. Signed-off-by: MengqingCao <cmq0113@163.com> Signed-off-by: ZhengWG <zwg0606@gmail.com>

@yiz-liu

### What this PR does / why we need it? Fix the shape of the `npu_moe_init_routing` input parameters to support aclgraph mode on qwen3-moe In addition to this PR, resolving the `gatherv3` error might be necessary. See related PR #1297 #1446 Thanks to @yiz-liu for providing the idea ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Tested on Qwen3-30B-A3B Closes: #1368 --------- Signed-off-by: ApsarasX <apsarax@outlook.com> Signed-off-by: Yikun Jiang <yikunkero@gmail.com> Co-authored-by: Yizhou Liu <liu_yizhou@outlook.com> Co-authored-by: Yikun Jiang <yikunkero@gmail.com>

@MengqingCao

I would like to nominate Mengqing Cao (@MengqingCao https://github.com/MengqingCao) as a maintainer, starting with my +1. ## Reason Review Quality‌: She has completed [120+ reviews](https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao) since Feb. 2025, include [#review-3077842852](#2088 (review)), [comment-2990074116](#1032 (comment)), [comment-2921063723](#1013 (comment)) high quality review. Sustained and Quality Contributions: She has Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases and solid contributions include The vLLM contributions and help vLLM Ascend release is the main reason I nominated her: - vLLM: Things worth mentioning that she completed [28+ PR contributions](https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+) in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support. She is one of the important co-authors of [vllm#8054](vllm-project/vllm#8054) and hardware plugin RFC, this makes vllm-ascend plugin possible. Community Involvement: She is also very active and involved in [60+ issues](https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao). So I think she's a great addition to the vLLM Ascend Maintainer team. - ✅**Review Quality‌:** She has completed 120+ reviews since Feb. 2025. https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao, include #2088 (review), #1446 (comment), #1032 (comment), #1013 (comment) quality review. - ✅**Sustained Contributions:** 99+ PR merged in vllm-project/vllm-ascend https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged - ✅**Quality Contribution‌:** She is one of the important co-authors of vllm-project/vllm#8054 , this makes vllm-ascend plugin possible. Things worth mentioning that she complete 28+ PR contributions in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support: https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+. At 2025 Q2, She also lead the [[RFC]: E2E CI test for key features](#413) and [[RFC]: Unit test coverage improvement](#1298) to help vllm ascend improve the coverage. Her main contributions focus on the adaptation of parallel strategies and communicator, such as #1800, #1856. These contributions are sufficient to prove she has “Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases” - ✅**Community Involvement‌:** Involved in 63+ issue reviewer https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao She led the v0.10.1 release as release manager - vLLM version: v0.10.0 - vLLM main: vllm-project/vllm@78dba40 Signed-off-by: Jade Zheng <zheng.shoujian@outlook.com>

@MengqingCao

I would like to nominate Mengqing Cao (@MengqingCao https://github.com/MengqingCao) as a maintainer, starting with my +1. ## Reason Review Quality‌: She has completed [120+ reviews](https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao) since Feb. 2025, include [#review-3077842852](vllm-project#2088 (review)), [comment-2990074116](vllm-project#1032 (comment)), [comment-2921063723](vllm-project#1013 (comment)) high quality review. Sustained and Quality Contributions: She has Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases and solid contributions include The vLLM contributions and help vLLM Ascend release is the main reason I nominated her: - vLLM: Things worth mentioning that she completed [28+ PR contributions](https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+) in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support. She is one of the important co-authors of [vllm#8054](vllm-project/vllm#8054) and hardware plugin RFC, this makes vllm-ascend plugin possible. Community Involvement: She is also very active and involved in [60+ issues](https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao). So I think she's a great addition to the vLLM Ascend Maintainer team. - ✅**Review Quality‌:** She has completed 120+ reviews since Feb. 2025. https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao, include vllm-project#2088 (review), vllm-project#1446 (comment), vllm-project#1032 (comment), vllm-project#1013 (comment) quality review. - ✅**Sustained Contributions:** 99+ PR merged in vllm-project/vllm-ascend https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged - ✅**Quality Contribution‌:** She is one of the important co-authors of vllm-project/vllm#8054 , this makes vllm-ascend plugin possible. Things worth mentioning that she complete 28+ PR contributions in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support: https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+. At 2025 Q2, She also lead the [[RFC]: E2E CI test for key features](vllm-project#413) and [[RFC]: Unit test coverage improvement](vllm-project#1298) to help vllm ascend improve the coverage. Her main contributions focus on the adaptation of parallel strategies and communicator, such as vllm-project#1800, vllm-project#1856. These contributions are sufficient to prove she has “Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases” - ✅**Community Involvement‌:** Involved in 63+ issue reviewer https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao She led the v0.10.1 release as release manager - vLLM version: v0.10.0 - vLLM main: vllm-project/vllm@78dba40 Signed-off-by: Jade Zheng <zheng.shoujian@outlook.com>

@MengqingCao

I would like to nominate Mengqing Cao (@MengqingCao https://github.com/MengqingCao) as a maintainer, starting with my +1. ## Reason Review Quality‌: She has completed [120+ reviews](https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao) since Feb. 2025, include [#review-3077842852](vllm-project#2088 (review)), [comment-2990074116](vllm-project#1032 (comment)), [comment-2921063723](vllm-project#1013 (comment)) high quality review. Sustained and Quality Contributions: She has Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases and solid contributions include The vLLM contributions and help vLLM Ascend release is the main reason I nominated her: - vLLM: Things worth mentioning that she completed [28+ PR contributions](https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+) in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support. She is one of the important co-authors of [vllm#8054](vllm-project/vllm#8054) and hardware plugin RFC, this makes vllm-ascend plugin possible. Community Involvement: She is also very active and involved in [60+ issues](https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao). So I think she's a great addition to the vLLM Ascend Maintainer team. - ✅**Review Quality‌:** She has completed 120+ reviews since Feb. 2025. https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao, include vllm-project#2088 (review), vllm-project#1446 (comment), vllm-project#1032 (comment), vllm-project#1013 (comment) quality review. - ✅**Sustained Contributions:** 99+ PR merged in vllm-project/vllm-ascend https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged - ✅**Quality Contribution‌:** She is one of the important co-authors of vllm-project/vllm#8054 , this makes vllm-ascend plugin possible. Things worth mentioning that she complete 28+ PR contributions in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support: https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+. At 2025 Q2, She also lead the [[RFC]: E2E CI test for key features](vllm-project#413) and [[RFC]: Unit test coverage improvement](vllm-project#1298) to help vllm ascend improve the coverage. Her main contributions focus on the adaptation of parallel strategies and communicator, such as vllm-project#1800, vllm-project#1856. These contributions are sufficient to prove she has “Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases” - ✅**Community Involvement‌:** Involved in 63+ issue reviewer https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao She led the v0.10.1 release as release manager - vLLM version: v0.10.0 - vLLM main: vllm-project/vllm@78dba40 Signed-off-by: Jade Zheng <zheng.shoujian@outlook.com>

…heduler (vllm-project#1446) ### What this PR does / why we need it? This fix the shape of block_table which was introduced by hybrid kv groups several weeks ago. Error will be raised when enable prefix-cache (eager or not) and Ascend Scheduler at the same time, just send two identical requests and it will reproduce. v0.9.1: vllm-project#1297 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Test manually Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>

…uler (vllm-project#1505) ### What this PR does / why we need it? Add test for chunked prefill and prefix cache on v1/AscendScheduler Covered scenarios: - `Qwen/Qwen3-0.6B-Base` and `deepseek-ai/DeepSeek-V2-Lite-Chat` --- multicard CI time increased by 19 min - `V1 + default scheduler` vs `V1 + default scheduler + enable prefix cache` - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable prefix cache` vs `V1 + Ascend scheduler + enable prefix cache + enable chunked prefill` - `Qwen/Qwen3-0.6B-Base` --- singlecard CI time increased by 8 min - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable chunked prefill` should rebase after vllm-project#1498 and vllm-project#1446 ### Does this PR introduce _any_ user-facing change? N/A ### How was this patch tested? CI passed with new added test. Signed-off-by: MengqingCao <cmq0113@163.com>

@yiz-liu

### What this PR does / why we need it? Fix the shape of the `npu_moe_init_routing` input parameters to support aclgraph mode on qwen3-moe In addition to this PR, resolving the `gatherv3` error might be necessary. See related PR vllm-project#1297 vllm-project#1446 Thanks to @yiz-liu for providing the idea ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Tested on Qwen3-30B-A3B Closes: vllm-project#1368 --------- Signed-off-by: ApsarasX <apsarax@outlook.com> Signed-off-by: Yikun Jiang <yikunkero@gmail.com> Co-authored-by: Yizhou Liu <liu_yizhou@outlook.com> Co-authored-by: Yikun Jiang <yikunkero@gmail.com>

…heduler (vllm-project#1446) ### What this PR does / why we need it? This fix the shape of block_table which was introduced by hybrid kv groups several weeks ago. Error will be raised when enable prefix-cache (eager or not) and Ascend Scheduler at the same time, just send two identical requests and it will reproduce. v0.9.1: vllm-project#1297 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Test manually Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>

…uler (vllm-project#1505) ### What this PR does / why we need it? Add test for chunked prefill and prefix cache on v1/AscendScheduler Covered scenarios: - `Qwen/Qwen3-0.6B-Base` and `deepseek-ai/DeepSeek-V2-Lite-Chat` --- multicard CI time increased by 19 min - `V1 + default scheduler` vs `V1 + default scheduler + enable prefix cache` - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable prefix cache` vs `V1 + Ascend scheduler + enable prefix cache + enable chunked prefill` - `Qwen/Qwen3-0.6B-Base` --- singlecard CI time increased by 8 min - `V1 + Ascend scheduler` vs `V1 + Ascend scheduler + enable chunked prefill` should rebase after vllm-project#1498 and vllm-project#1446 ### Does this PR introduce _any_ user-facing change? N/A ### How was this patch tested? CI passed with new added test. Signed-off-by: MengqingCao <cmq0113@163.com>

@yiz-liu

### What this PR does / why we need it? Fix the shape of the `npu_moe_init_routing` input parameters to support aclgraph mode on qwen3-moe In addition to this PR, resolving the `gatherv3` error might be necessary. See related PR vllm-project#1297 vllm-project#1446 Thanks to @yiz-liu for providing the idea ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Tested on Qwen3-30B-A3B Closes: vllm-project#1368 --------- Signed-off-by: ApsarasX <apsarax@outlook.com> Signed-off-by: Yikun Jiang <yikunkero@gmail.com> Co-authored-by: Yizhou Liu <liu_yizhou@outlook.com> Co-authored-by: Yikun Jiang <yikunkero@gmail.com>

@MengqingCao

I would like to nominate Mengqing Cao (@MengqingCao https://github.com/MengqingCao) as a maintainer, starting with my +1. ## Reason Review Quality‌: She has completed [120+ reviews](https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao) since Feb. 2025, include [#review-3077842852](vllm-project#2088 (review)), [comment-2990074116](vllm-project#1032 (comment)), [comment-2921063723](vllm-project#1013 (comment)) high quality review. Sustained and Quality Contributions: She has Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases and solid contributions include The vLLM contributions and help vLLM Ascend release is the main reason I nominated her: - vLLM: Things worth mentioning that she completed [28+ PR contributions](https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+) in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support. She is one of the important co-authors of [vllm#8054](vllm-project/vllm#8054) and hardware plugin RFC, this makes vllm-ascend plugin possible. Community Involvement: She is also very active and involved in [60+ issues](https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao). So I think she's a great addition to the vLLM Ascend Maintainer team. - ✅**Review Quality‌:** She has completed 120+ reviews since Feb. 2025. https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+is%3Aclosed+commenter%3Amengqingcao+-author%3Amengqingcao, include vllm-project#2088 (review), vllm-project#1446 (comment), vllm-project#1032 (comment), vllm-project#1013 (comment) quality review. - ✅**Sustained Contributions:** 99+ PR merged in vllm-project/vllm-ascend https://github.com/vllm-project/vllm-ascend/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged - ✅**Quality Contribution‌:** She is one of the important co-authors of vllm-project/vllm#8054 , this makes vllm-ascend plugin possible. Things worth mentioning that she complete 28+ PR contributions in vllm-project/vllm, especially for vLLM platform module to improve vLLM mult hardware support: https://github.com/vllm-project/vllm/pulls?q=is%3Apr+author%3AMengqingCao+is%3Amerged+. At 2025 Q2, She also lead the [[RFC]: E2E CI test for key features](vllm-project#413) and [[RFC]: Unit test coverage improvement](vllm-project#1298) to help vllm ascend improve the coverage. Her main contributions focus on the adaptation of parallel strategies and communicator, such as vllm-project#1800, vllm-project#1856. These contributions are sufficient to prove she has “Deep understanding of ‌vLLM‌ and ‌vLLM Ascend‌ codebases” - ✅**Community Involvement‌:** Involved in 63+ issue reviewer https://github.com/vllm-project/vllm-ascend/issues?q=is%3Aissue%20state%3Aclosed%20-author%3AMengqingCao%20commenter%3AMengqingCao She led the v0.10.1 release as release manager - vLLM version: v0.10.0 - vLLM main: vllm-project/vllm@78dba40 Signed-off-by: Jade Zheng <zheng.shoujian@outlook.com>

Fix blcok table shape

a37cce9

Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>

wangxiyuan approved these changes Jun 27, 2025

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Yikun mentioned this pull request Jun 27, 2025

[Release]: Release checklist for v0.9.1rc2 on main #1486

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Yikun changed the title ~~[Fix] Fix block table shape~~ [Core] Fix block table shape to make Prefix cache work with Ascend scheduler Jun 27, 2025

Yikun added the no-test label Jun 28, 2025

MengqingCao mentioned this pull request Jun 28, 2025

[CI/UT] Add test for chunk prefill and prefix cache on v1/AscendScheduler #1505

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Yikun added the ready read for review label Jun 29, 2025

wangxiyuan approved these changes Jun 30, 2025

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wangxiyuan merged commit 75d05ee into vllm-project:main Jun 30, 2025
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yiz-liu deleted the fix-prefix-cache-main branch June 30, 2025 12:01

Yikun mentioned this pull request Jul 6, 2025

[Bugfix] Support Qwen3-MOE on aclgraph mode #1381

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This was referenced Jul 13, 2025

[Bug]: Prefix cache feature does not work with the Ascend Scheduler #1350

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[v0.9.1][Fix] Fix block table shape #1297

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jianzs mentioned this pull request Aug 19, 2025

Nominate Mengqing Cao as vllm-ascend maintainer #2433

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[Core] Fix block table shape to make Prefix cache work with Ascend scheduler #1446

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[Core] Fix block table shape to make Prefix cache work with Ascend scheduler #1446

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edited by Yikun

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codecov bot commented Jun 26, 2025 •

edited

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