BBuf/vllm-deepseek-v31-optimization
skills/model-optimization/vllm/vllm-deepseek-v31-optimization/SKILL.md
PR-backed optimization manual for DeepSeek V3.1 in vLLM. Use when an engineer needs to audit, debug, extend, or document DeepSeek V3.1 parser, scale-format, DeepGEMM, and reasoning-tooling deltas layered on top of the base DeepSeek V3 runtime.
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SKILL.md
- name:
- vllm-deepseek-v31-optimization
- description:
- PR-backed optimization manual for DeepSeek V3.1 in vLLM. Use when an engineer needs to audit, debug, extend, or document DeepSeek V3.1 parser, scale-format, DeepGEMM, and reasoning-tooling deltas layered on top of the base DeepSeek V3 runtime.
vLLM DeepSeek V3.1 Optimization
Overview
This skill covers DeepSeek V3.1 parser, scale-format, DeepGEMM, and reasoning-tooling deltas layered on top of the base DeepSeek V3 runtime.
Evidence snapshot:
- vLLM mainline checked around
0f7be0f2f76814f80f9091220a5fbbb53912ad00 - Support status: supported on current mainline
- Family baseline: read
deepseek-v3-r1first; this dossier only records the delta fordeepseek-v31. - Canonical PR notes:
references/pr-history.md - History mirrors:
model-pr-optimization-history/vllm/deepseek-v31/README.zh.mdandREADME.en.md
Non-Negotiable Evidence Rule
Use skills/model-optimization/model-pr-diff-dossier/SKILL.md as the production bar.
Every PR cited for this family must be based on diff reading, not only PR titles.
Runtime Surfaces
vllm/vllm/model_executor/models/deepseek_v2.pyvllm/vllm/model_executor/layers/quantization/utils/flashinfer_utils.py
Current Main Summary
- V3.1 mostly reuses the base V3 runtime and adds parser plus scale-format correctness work.
- The practical blast radius is in tool calling, DeepGEMM scale handling, and reasoning-parser behavior.
Key Landed PRs
- #23454
Support DeepSeek-V3.1 tool call: Added the first V3.1-specific tool-call parser surface to vLLM. - #23666
Add Hopper DeepGEMM E8M0 for DeepSeekV3.1 scale_fmt: Tuned the scale-format path used by DeepGEMM-based DeepSeek V3.1 kernels. - #25589
Add DeepSeek-V3.1 reasoning parser: Separated V3.1 reasoning output handling from generic DeepSeek parsing. - #32361
Fix DeepSeek-V3.1 + DeepGEMM incompatible scale shapes: Patched a concrete shape mismatch between newer checkpoints and DeepGEMM assumptions.
Open Optimization Items
- Re-run PR search before claiming new support beyond the checked mainline commit.
Validation Lanes
- Tool-call extraction on non-streaming and streaming outputs.
- DeepGEMM-backed launch with V3.1 scale-format checkpoints.
- Reasoning parser output separation under long responses.
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