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fix: defer Ascend dependencies for container preload - #48
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Reviewing files that changed from the base of the PR and between 3827087 and 90c1fce.
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Files selected for processing: 30
README.md
README.zh-CN.md
crates/hook/src/host_args.rs
crates/hook/src/lib.rs
crates/hook/src/ownership.rs
crates/hook/src/signal_compat.rs
crates/hook/src/spatial.rs
crates/limiter/Cargo.toml
crates/limiter/build.rs
crates/limiter/src/config.rs
crates/limiter/src/dynamic.rs
crates/limiter/src/externed_api.rs
crates/limiter/src/lib.rs
crates/limiter/src/manager.rs
crates/limiter/src/supervisor.rs
dockerfiles/Dockerfile
docs/configuration.md
docs/configuration.zh-CN.md
docs/testing.md
scripts/ci.sh
scripts/ci/link-stubs.c
scripts/ci/verify-release.py
test/host_args/probe.c
test/manager_cpu/src/lib.rs
test/memory_cpu/src/lib.rs
test/preload/probe.c
test/preload/run.py
test/preload/runtime.c
test/spatial_cpu/run.py
test/worker_cpu/src/lib.rs
Walkthrough
The change replaces eager CANN/runtime and DCMI linking with lazy symbol resolution. It also updates hook and supervisor startup behavior, adds preload and release checks, and revises build and runtime instructions.
Changes: Lazy loading and preload behavior
Layer / File(s)
Summary
Lazy SDK and DCMI symbol resolution crates/limiter/src/dynamic.rs, crates/limiter/src/externed_api.rs, crates/limiter/src/manager.rs, crates/limiter/build.rs, crates/limiter/src/lib.rs, test/manager_cpu/src/lib.rs, test/memory_cpu/src/lib.rs, test/worker_cpu/src/lib.rs
The limiter resolves SDK and DCMI symbols dynamically and caches successful lookups. Runtime and DCMI wrappers use these resolvers. The build no longer links DCMI, and CPU test crates expose the dynamic module.
Configuration checks gate limiter setup and spatial policy initialization. Hooks return a process-local stub client when vNPU configuration is absent and resolve symbols dynamically. The sigaction interposer and constructor-based logger initializer are removed; logger setup moves to configured supervisor startup.
CI removes SDK link stubs, rejects eager CANN/runtime and DCMI dependencies, and runs preload checks. The tests cover passive startup, signal handling, and retries after global or local backend loading.
Build and runtime instructions README.md, README.zh-CN.md, docs/configuration.md, docs/configuration.zh-CN.md
The instructions describe SDK libraries as API verification inputs rather than link-time dependencies. They document container-scoped /etc/ld.so.preload, optional LD_PRELOAD, and lazy resolution when NPU APIs are used.
sequenceDiagram
participant Application
participant Hook as libvnpu hook
participant Resolver as limiter dynamic resolver
participant SDK as CANN runtime or ACL library
Application->>Hook: Call intercepted NPU API
Hook->>Resolver: Resolve SDK symbol
Resolver->>Resolver: Check RTLD_NEXT
Resolver->>SDK: Load library and look up symbol when needed
SDK-->>Resolver: Return symbol address
Resolver-->>Hook: Return resolved address
Hook->>SDK: Forward API call
Loading
Possibly related issues
[Tracking] Per-NPU resource limits: multi-card support and validation #45 — The change updates vNPU configuration checks and per-device limiter selection, which relate to the issue’s resource-limit interface; it does not establish that the issue’s quota and accounting requirements are completed.
Possibly related PRs
Project-HAMi/hami-vnpu-core#47 — This PR changes the runtime symbol interface used by the per-NPU admission and runtime device/context APIs added in #47.
Suggested reviewers:chengchen666, xiguapi-h
Merge Risk: Low · previous review 38270
The English build instructions may cause developers to prepare unnecessary Ascend dependencies. This is a bounded documentation issue and need not block merging.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring Coverage
Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Description Check
Check skipped - CodeRabbit’s high-level summary is enabled.
Title check
The title "fix: defer Ascend dependencies for container preload" matches the main change. The PR defers CANN, ACL, DCMI, and runtime symbol resolution to first NPU use. This lets ordinary commands sta…
Linked Issues check
Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check
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Full details: Title check
Explanation
The title "fix: defer Ascend dependencies for container preload" matches the main change. The PR defers CANN, ACL, DCMI, and runtime symbol resolution to first NPU use. This lets ordinary commands start when libvnpu.so is injected through /etc/ld.so.preload. The title is concise, specific, and free of file lists or vague wording. It does not name every change, such as removing the sigaction interposer or the logger move, which the title does not need to cover.
Full details: Docstring Coverage
Explanation
Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 16 functions across 19 files. (6 skipped: 6 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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A rabbit checks the preload file at dawn Then lets the runtime symbols wait Until an NPU call arrives The hooks resolve what they need And hop along their quiet way
Comment @coderabbitai help to get the list of available commands.
Resolve CANN, ACL and DCMI APIs on demand so ordinary processes can start before the NPU runtime is available. Defer logger initialization, remove the global sigaction interposer, and keep unconfigured processes passive.
Add preload regressions, reject eager SDK dependencies during release verification, and document container preload deployment.
Signed-off-by: maverick123123 <yuming.wu@dynamia.ai>
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Actionable comments posted: 1
🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @README.md:
- Around line 36-41: Update the English direct-build paragraph in the README to
require only Rust 1.94.0 and a C compiler, and remove the requirement to install
CANN/DCMI development libraries or initialize the CANN environment. Preserve the
build command, output location, and configuration-reference link.
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Commits
Reviewing files that changed from the base of the PR and between 9f4309e and 3827087.
Files ignored due to path filters: 1
Cargo.lock is excluded by !**/*.lock
Files selected for processing: 28
README.md
README.zh-CN.md
crates/hook/src/lib.rs
crates/hook/src/ownership.rs
crates/hook/src/signal_compat.rs
crates/hook/src/spatial.rs
crates/limiter/Cargo.toml
crates/limiter/build.rs
crates/limiter/src/config.rs
crates/limiter/src/dynamic.rs
crates/limiter/src/externed_api.rs
crates/limiter/src/lib.rs
crates/limiter/src/manager.rs
crates/limiter/src/supervisor.rs
dockerfiles/Dockerfile
docs/configuration.md
docs/configuration.zh-CN.md
docs/testing.md
scripts/ci.sh
scripts/ci/link-stubs.c
scripts/ci/verify-release.py
test/manager_cpu/src/lib.rs
test/memory_cpu/src/lib.rs
test/preload/probe.c
test/preload/run.py
test/preload/runtime.c
test/spatial_cpu/run.py
test/worker_cpu/src/lib.rs
Files with no reviewable changes: 3
scripts/ci/link-stubs.c
crates/hook/src/signal_compat.rs
crates/limiter/Cargo.toml
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Keep a reference to the library owning each cached address so application dlclose calls cannot invalidate runtime or HostArgs entry points. Reuse the retained resolver for HostArgs and cover concurrent first lookup and global/local handle release.
Correct the English direct-build prerequisites to match the lazy loading implementation.
Signed-off-by: maverick123123 <yuming.wu@dynamia.ai>
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Fix
libruntime.soloading errors that prevent ordinary commands such asbashfrom starting with/etc/ld.so.preload.Load CANN/DCMI only when needed, defer logger initialization, and preserve normal signal handling. Add regression checks and update deployment docs.
Validated with CPU tests, real SDK checks, and Ascend 310P allocation/quota tests.