[CI] increase shm-size to 128G in _unit_test_coverage.yml

[EmmonsCurse]

Motivation

In parallel test execution, multiple processes may concurrently utilize shared memory (/dev/shm), which can lead to instability under the current 64GB limit. Specifically:

• DataLoader relies on shared memory for multiprocessing data transfer
• CUDA may use shared memory for IPC mechanisms
• Multiple test processes can access /dev/shm simultaneously

This may result in intermittent failures (e.g., Killed) due to insufficient shared memory.

Modifications

• Increase Docker shared memory size from 64GB to 128GB in _unit_test_coverage.yml to improve stability under parallel workloads
• Add --ulimit nofile=65536:65536 to increase maximum open file descriptors
• Add --ulimit nproc=8192:8192 to increase maximum user processes

Usage or Command

N/A

Accuracy Tests

N/A

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[EmmonsCurse]

/skip-ci ci_iluvatar
/skip-ci ci_hpu
/skip-ci build_xpu
/skip-ci gpu_4cards_test
/skip-ci pre_ce_test
/skip-ci stable_test
/skip-ci base_test
/skip-ci logprob_test

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (develop@d693d4b). Learn more about missing BASE report.

Additional details and impacted files

@@            Coverage Diff             @@
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  Coverage           ?   73.45%           
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  Files              ?      377           
  Lines              ?    53229           
  Branches           ?     8312           
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  Hits               ?    39098           
  Misses             ?    11392           
  Partials           ?     2739           

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[fastdeploy-bot]

🤖 AI Code Review | 2026-04-08

📋 Review 摘要

PR 概述：增加 CI 测试容器的共享内存和 ulimit 限制

变更范围：.github/workflows/_unit_test_coverage.yml

影响面 Tag：[CI]

📝 PR 规范检查

PR 标题包含有效 Tag [CI]，描述包含 Motivation 和 Modifications 部分，符合规范。

但 Modifications 部分描述不完整：仅提到了 shm-size 的增加，未提及新增的两个 --ulimit 配置。

建议更新：

## Modifications

- Increase Docker shared memory size from `64GB` to `128GB` in `_unit_test_coverage.yml` to improve stability under parallel workloads
- Add `--ulimit nofile=65536:65536` to increase maximum open file descriptors
- Add `--ulimit nproc=8192:8192` to increase maximum user processes

问题

级别	文件	概述
🟡 建议	PR 描述	Modifications 未涵盖所有变更

总体评价

CI 配置变更合理，有助于提升并行测试稳定性。建议补充 PR 描述以完整记录所有修改内容。

另外注意到项目中还有多个其他 CI 文件使用 shm-size=64G（如 _base_test.yml、_gpu_4cards_case_test.yml 等），如果共享内存不足问题在其他测试中也存在，可能需要同步调整。但若仅 _unit_test_coverage.yml 存在此问题，当前变更范围合理。

[fastdeploy-bot]

🟡 建议 PR 描述中的 Modifications 部分未涵盖此变更。

PR 描述仅提到了 shm-size 的增加，但未提及新增的这两个 --ulimit 配置。建议在 PR 描述中补充说明这些 ulimit 限制的作用，便于后续维护者理解变更背景。

[DDDivano]

good