mirror of
https://github.com/mudler/LocalAI.git
synced 2026-06-24 16:49:06 -04:00
Re-run the dense Qwen3.6-27B NVFP4 vs vLLM A/B with patch 0013's QoS prefill budget enabled (LLAMA_PREFILL_BUDGET swept over 256/512/1024), fixing the prior run that left prefill unbounded and let high-concurrency prefills starve each other. At the saturated npl128 point budget=256 is the best lever: decode_agg 134.6 -> 161.2 tok/s (+19.8%) and TTFT 491.2 s -> 305.4 s (-37.8%) vs the starved stock run, moving llama from 34.5% to 41.3% of vLLM decode. Larger budgets help less; at light/moderate concurrency the budget is net-negative for TTFT because this all-at-once workload has no in-flight decode to protect at t=0. Documented honestly: a real but narrow high-concurrency lever, not a gap-closer (vLLM still ~2.4x decode / ~12x lower TTFT at npl128). Assisted-by: Claude:opus-4.8 [Claude Code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io>