vh
d28a371049
Root cause of the multi-day degeneration hunt, operator-confirmed: the AEON NVFP4 W4A4 quant (sakamakismile/Qwen3.8-27B-AEON-ULTIMATE-UNCENSORED-NVFP4, full W4A4 incl. attention) went degenerate ~15-20% of generations in real multi-turn use and forced regenerates. MTP, prefix-caching, and the gateway all merely AMPLIFIED it, which is why MTP-off, APC-off, and the vLLM #51113 fix each 'helped' a synthetic probe without fixing it -- three plausible false root-causes, each passing one clean run then failing in real use. The fix was the WEIGHTS: the in-house JonathanColetti/Heretic mixed NVFP4+FP8 build (qwen38-27b-uncensored-nvfp4-mixed, FP8 attention not W4A4, same base, same MTP) is coherent through long multi-turn with MTP ON. W4A4 *attention* was the defect; FP8 attention is not. This commit: - GEN_MODEL -> the mixed FP8-attn build (primary gen until DavidAU 3.8 lands) - GEN_IMAGE pinned to vllm/vllm-openai:nightly-311b3513... (v0.27.2rc1.dev150, carries #51113; pinned by sha so it does not drift on the next pull) - AEON weights PURGED from /tank (no-good), safety-checked not-in-use first - playbook 3.8: the stochastic-W4A4-degeneration lesson + isolate-weights-early + do-not-declare-a-fix-from-one-probe (it validated three non-fixes) AEON is re-pullable from HF if ever needed, but the operator ruled it no-good.
gen-seat — the fleet gen seat (ana-ml2 GPU0, :8015)
Serves qwen3.8-27b-uncensored (JonathanColetti/Qwen3.8-27B-Uncensored,
Heretic-abliterated Qwen3.8-27B, vision-intact, 262K context) plus the
-thinking served-name for the reasoning split.
Backs 7 LiteLLM aliases: gen, gen-reasoning, summarizer,
summarizer-large, classifier, image-judge, qwen-image-bench. Treat any
change here as fleet-wide.
- Quant: in-house mixed-precision — NVFP4 W4A4 for layers 0-55 MLPs,
FP8 W8A8 for attention /
linear_attn/lm_head/ layers 56-63 MLPs, FP8 KV. ~94.5 tok/s decode at bs=1, MTP n=3 @ ~48% acceptance. - Speculative decoding:
qwen3_5_mtp,num_speculative_tokens=3(measured optimum — see the quant service README). - Tunables:
.envon the host. ⚠ it is mode 0600 / lkraven-owned, so everydocker composecall against this stack needssudo— without it compose cannot read.env, fails withpermission denied, and leaves the old container running while appearing to have succeeded.
Pipeline, acceptance gate, and rollback
All of it — the recipe, the re:^mtp.* foot-gun, the benchmark harness, the GPU0
budget interaction with meromero-charrp, and the rollback command — lives in
services/gen-seat-mixed-quant/README.md.
Deploy
scripts/deploy-stack.sh ana-ml2 gen-seat # diffs vs live, prompts y/N
# on host:
ssh infra-ops@10.250.50.54
cd /opt/docker/compose/gen-seat && sudo docker compose up -d vllm-gen