dankclaw: switch frank-default-large to unsloth Qwen3.8-27B UD-Q8_K_XL
- rebuild llama.cpp stock to b10433 (9b05354ec) for bundled-MTP support - MODEL_FILE -> Qwen3.8-27B-UD-Q8_K_XL.gguf; DRAFT_FILE empty (MTP bundled) - SPEC: draft-mtp, n_max=10, p_min off (~30 t/s stable) - matrix winner - CTX 524288 / parallel 2 = 262144/slot (matches pi contextWindow) - serve script: bundled-MTP (no --spec-draft-model), optional --spec-draft-p-min
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Frank
@@ -1,51 +1,51 @@
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# Tunables for frank-default-large (HauhauCS Qwen3.6-27B Q8_K_P, DFlash+ngram-mod, dankclaw)
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# Runtime: llama.cpp llama-server; AMD Strix Halo (gfx1151) 96GB UMA; Ryzen AI MAX+ 395.
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# Tunables for frank-default-large (unsloth Qwen3.8-27B UD-Q8_K_XL, dankclaw)
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# Runtime: llama.cpp llama-server (b10433+, rebuilt 2026-08-14 for bundled-MTP
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# support); AMD Strix Halo (gfx1151) 96GB UMA; Ryzen AI MAX+ 395.
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MODEL_DIR=/home/dank/models
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MODEL_FILE=Qwen3.8-27B-UD-Q8_K_XL.gguf
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ALIAS=frank-default-large
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HOST=0.0.0.0
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PORT=7770
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# 3 parallel slots x 200700 ctx each = 602100 total context pool.
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CTX_SIZE=602100
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PARALLEL=3
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# Spec: speculative decoding mode.
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# draft-dflash - DFlash block-diffusion draft (benchmark winner pre-2026-08-14)
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# BUT: premature EOS under parallel load when a new task
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# reuses a cached prompt (shared draft ctx corruption). Retired.
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# draft-mtp - MTP sidecar draft (a4lg/Qwen3.6-27B-MTP-ONLY-Q8_0.gguf)
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# ngram-mod - draftless ngram matching (no draft model, no shared ctx)
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# Benched 2026-08-14: see docs/frank-default-large-benchmark.md for the winner.
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# Context pool. Qwen3.8 native context = 262144 per sequence.
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# 524288 total / PARALLEL 2 = 262144 per slot, matching the pi client's
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# contextWindow=262144 for frank-default-large. Model is 29GB; ROCm has
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# ~70GB headroom, so 2x262k quantized KV fits. Verify at startup.
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CTX_SIZE=524288
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PARALLEL=2
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# Spec: selected from the 2026-08-14 matrix (bench-spec-matrix.sh).
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# WINNER: draft-mtp alone, n_max=10, p_min off -> ~30 t/s, STABLE, no
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# premature stop. Layered draft-mtp,ngram-mod was faster on paper (median
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# 133 t/s) but is non-deterministic (10-148 t/s) and shows a degenerate
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# instant-EOS (tok=0) -> the same premature-stop class that retired DFlash.
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# Rejected as production-unsafe.
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SPEC_TYPE=draft-mtp
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# Draft model file (only used when SPEC_TYPE contains 'draft-').
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# DFlash: Qwen3.6-27B-DFlash-Q8_0.gguf ; MTP: Qwen3.6-27B-MTP-ONLY-Q8_0.gguf
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DRAFT_FILE=Qwen3.6-27B-MTP-ONLY-Q8_0.gguf
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# Draft length per spec type: dflash 8, mtp 2-3.
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SPEC_DRAFT_N_MAX=3
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# Bundled MTP: Qwen3.8 keeps the MTP head in the target GGUF. llama.cpp
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# auto-detects it (b10411+). DRAFT_FILE MUST stay EMPTY.
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DRAFT_FILE=
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# Draft length + sampling floor, from the spec matrix (n_max 2..10, p_min
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# off/0.8; p_min 0.8 did not help draft-mtp and slowed it slightly).
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SPEC_DRAFT_N_MAX=10
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SPEC_DRAFT_P_MIN=
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SPEC_NGRAM_MOD_N_MIN=48
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SPEC_NGRAM_MOD_N_MAX=64
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SPEC_NGRAM_MOD_N_MATCH=24
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# Backend device from --list-devices. ROCm wins on generation; Vulkan renders
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# DFlash spec unusable (NONE-op abort) and gen is slower on ngram (6.9 t/s).
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# Backend device from --list-devices. ROCm0 is the production backend.
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DEVICE=ROCm0
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# Dense model (Qwen3.6-27B, not MoE): no MoE CPU offload. Full offload.
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# Dense model: full offload. (Not MoE.)
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N_GPU_LAYERS=all
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# KV on GPU, quantized (K q8_0, V q8_0). V MUST match K: this llama.cpp
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# build has GGML_CUDA_FA_ALL_QUANTS=OFF, and Flash Attention requires
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# K type == V type. Mixed q8_0/f16 silently disables FA, collapsing
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# long-context decode to ~1 t/s at 200k ctx. q8_0 V halves V memory too.
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# KV on GPU, quantized (K q8_0, V q8_0). Keep K == V for Flash Attention;
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# mixed types silently disable FA (long-context decode collapses).
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CACHE_TYPE_K=q8_0
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CACHE_TYPE_V=q8_0
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# Batch sizing: empirically verified 2026-08-13 with caches dropped.
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# batch 8192 / ubatch 2048 loads and serves (61 GiB VRAM peak, ctx 602100).
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# ubatch is the compute-graph driver; larger ubatch = more VRAM, faster prefill.
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# Re-verified 2026-08-14 during the spec swap (see benchmark doc).
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BATCH_SIZE=8192
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UBATCH_SIZE=8192
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# Sampling settings — per HauhauCS Qwen3.6-27B model card.
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# Thinking-general: temp=1.0, top_p=0.95, top_k=20, min_p=0.
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# Clients may override per-request; these are the server-side defaults.
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# Batch sizing (start conservative; tune after verifying memory):
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# ubatch is the compute-graph driver; larger = more VRAM, faster prefill.
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BATCH_SIZE=2048
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UBATCH_SIZE=512
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# Sampling settings — per Qwen3.8-27B model card thinking mode.
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# Thinking: temp=1.0, top_p=0.95, top_k=20, min_p=0. Clients may override.
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# WARNING: do not name this variable TEMP. The ROCm HIP runtime reads the
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# TEMP environment variable (JIT kernel-cache dir); TEMP=1.0 made the HIP
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# runtime SEGV (NULL unref) during model load on Aug 13 2026.
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# runtime SEGV during model load on Aug 13 2026.
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TEMPERATURE=1.0
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TOP_K=20
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TOP_P=0.95
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@@ -1,8 +1,7 @@
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#!/usr/bin/env bash
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# Serve HauhauCS Qwen3.6-27B-Uncensored-HauhauCS-Aggressive:Q8_K_P
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# with DFlash draft speculative decoding (draft-dflash) on dankclaw
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# (AMD Strix Halo gfx1151, ROCm backend).
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# Runtime: llama.cpp llama-server.
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# Serve unsloth Qwen3.8-27B UD-Q8_K_XL on dankclaw with bundled-MTP
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# speculative decoding (draft-mtp). ROCm backend.
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# Runtime: llama.cpp llama-server (>= b10411).
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#
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# Tunables come from frank-default-large.env in this directory unless the
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# FRANK_LARGE_ENV_FILE environment variable overrides that path.
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@@ -19,15 +18,15 @@ fi
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# --- defaults (used when the env file does not set them) -----------------
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: "${MODEL_DIR:=/home/dank/models}"
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: "${MODEL_FILE:=Qwen3.6-27B-Uncensored-HauhauCS-Aggressive-Q8_K_P.gguf}"
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: "${DRAFT_FILE:=Qwen3.6-27B-DFlash-Q8_0.gguf}"
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: "${MODEL_FILE:=Qwen3.8-27B-UD-Q8_K_XL.gguf}"
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: "${DRAFT_FILE:=}" # empty: Qwen3.8 bundles its MTP drafter in-model
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: "${ALIAS:=frank-default-large}"
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: "${HOST:=0.0.0.0}"
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: "${PORT:=7770}"
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: "${CTX_SIZE:=602100}"
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: "${PARALLEL:=3}"
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: "${SPEC_TYPE:=draft-dflash}"
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: "${SPEC_DRAFT_N_MAX:=8}"
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: "${CTX_SIZE:=262144}" # Qwen3.8 native context (env may raise for parallel≥2)
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: "${PARALLEL:=2}"
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: "${SPEC_TYPE:=draft-mtp}"
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: "${SPEC_DRAFT_N_MAX:=10}"
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: "${SPEC_NGRAM_MOD_N_MIN:=48}"
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: "${SPEC_NGRAM_MOD_N_MAX:=64}"
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: "${SPEC_NGRAM_MOD_N_MATCH:=24}"
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@@ -53,16 +52,19 @@ if [[ ! -f "$MODEL" ]]; then
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exit 1
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fi
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# Draft-model flags apply only to spec types that use a draft file
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# (draft-dflash, draft-mtp, draft-eagle3). ngram-mod is draftless.
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# Draft-model flag applies only when a separate draft file is provided.
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# Qwen3.8 bundles MTP in-model; leave DRAFT_FILE empty to use bundled MTP.
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SPEC_ARGS=()
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if [[ "$SPEC_TYPE" == *draft-* ]]; then
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if [[ -n "$DRAFT_FILE" ]]; then
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if [[ ! -f "$DRAFT" ]]; then
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echo "missing required file: $DRAFT" >&2
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exit 1
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fi
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SPEC_ARGS+=(--spec-draft-model "$DRAFT")
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fi
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if [[ -n "${SPEC_DRAFT_P_MIN:-}" ]]; then
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SPEC_ARGS+=(--spec-draft-p-min "$SPEC_DRAFT_P_MIN")
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fi
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exec "$LLAMA_SERVER" \
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--model "$MODEL" \
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