Cherry-pick PR #297 to v0.3.0-dev: Add thead vendor attention backend - #360
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<!-- One of [Core | Vendor | OP | Tools | Others] --> vendor <!-- One of [User Experience | New Features | Bug Fixes | Improvements | Performance | Breaking Change | Deprecations | Test Case | Docs | Others] --> User Experience <!-- Describe what this PR does and why. --> add thead vendor attention backend <!-- Link any related issues: Fixes #issue, Closes #issue, or Related to <!-- List the key changes made in this PR. --> - add thead vendor attention backend <!-- How has this change been tested? Include test commands, hardware used, etc. --> - verify qwen3.6-35B use vendor attention backend on PPU without accuracy and perf verify minicpm5 use vendor attention backend on PPU with accuracy and perf - [ ] I have run the existing tests and they pass - [ ] I have added tests for my changes (if applicable) - [ ] I have updated the documentation (if applicable) (cherry picked from commit d1327ae)
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This PR cherry-picks #297 (add thead vendor attention backend) to the v0.3.0-dev branch.
Test Results
Environment: Host 810e, vLLM 0.24.0 + vllm-plugin-FL PR#360
Model: Qwen3.6-35B-A3B (MoE, TP=1, BF16)
✅ CUDA Graph Mode (Default)
max_model_len=2048,max_num_seqs=4, noenforce_eager✅ Eager Mode
enforce_eager=True,max_model_len=2048Conclusion: PR#360 works correctly on thead hardware with both eager and CUDA graph modes.