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DeepEP HT: enable worst-token full decode graphs#35

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fergusfinn wants to merge 2 commits into
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codex/deepep-ht-worst-token-graphs
Draft

DeepEP HT: enable worst-token full decode graphs#35
fergusfinn wants to merge 2 commits into
upstream-basefrom
codex/deepep-ht-worst-token-graphs

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@fergusfinn

@fergusfinn fergusfinn commented Jun 18, 2026

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Summary

  • add VLLM_DEEPEP_HT_WORST_TOKEN_DISPATCH and keep DeepEP HT on full decode CUDA graphs when enabled
  • use worst-token dispatch sizing so captured DeepEP HT dispatch/combine avoid host count syncs
  • carry the required full-capture DBO metadata and SM-control changes for graphed ubatches
  • log 30s TBO execution-mode counters for ubatched capture/replay/eager and plain eager/graph paths

Notes

This is the clean replacement for #27 after splitting support work into #19 and #28-#34. It intentionally excludes the already split API socket, GC freeze, P2C load balancing, DSv4 overlap gate, DBO failure hardening, workspace spill, and DP wake/trace changes.

Validation

  • git diff --check origin/main..HEAD
  • python3 -m py_compile vllm/config/compilation.py vllm/envs.py vllm/model_executor/layers/fused_moe/prepare_finalize/deepep_ht.py vllm/models/deepseek_v4/compressor.py vllm/v1/attention/backends/mla/indexer.py vllm/v1/attention/backends/mla/sparse_swa.py vllm/v1/attention/backends/utils.py vllm/v1/worker/dp_utils.py vllm/v1/worker/gpu_model_runner.py vllm/v1/worker/gpu_ubatch_wrapper.py vllm/v1/worker/sm_control.py vllm/v1/worker/ubatch_utils.py
  • python3 -m py_compile vllm/v1/worker/gpu_ubatch_wrapper.py

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@fergusfinn fergusfinn changed the base branch from main to upstream-base June 19, 2026 15:34
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