Frank
8212d4451a
Mechanical identity rename across the knowledge base, AGENTS.md, README, the
hermes config example, and homepage services.json. No behavior change; served
aliases on the LLM endpoints change with the deploy of commit 69f87c8.
109 lines
4.4 KiB
Markdown
109 lines
4.4 KiB
Markdown
# Ling-3.0-flash Q6_K Trial on Dankclaw
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> **RETIRED 2026-08-17.** The `frank-large-ling` unit is disabled under the boot policy. At this page's retirement date `frank-large` ran the Qwen3.8-27B PP head (since superseded by the STRIX deployment — see [[kingjones-strix-rocmfp4]]), not the Qwen3.6-27B config described in the (obsolete) switch-back section below.
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## Status
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- Service: `frank-large-ling` (systemd).
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- Model: `inclusionAI/Ling-3.0-flash` Q6_K (MoE, ~118B total params).
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- Runtime: llama.cpp **fork** `aetherbird/llama.cpp` branch
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`bailingmoe3-support` (commit `db4480bc8`, build b10411) at
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`/home/dank/llama.cpp-ling`. Stock llama.cpp cannot load the
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`bailingmoe3` architecture.
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- Backend: `Vulkan0` (RADV) with AMD GTT.
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- Spec: `draft-mtp` `n_max 3`. The MTP block is bundled in the Ling GGUF
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itself (block 42) - no separate drafter file.
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- Context: 262144 total, 2 slots x 131072, batch 512 / ubatch 256.
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- Measured: load ~45s, generation ~7.7 t/s (cold, 4k prompt) to ~36 t/s
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(tiny cached prompt). Concurrent streams both complete.
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## Why Vulkan + GTT
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The Strix Halo APU has 8 x 16 GB LPDDR5 modules = **128 GB physical
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shared memory**. The firmware carves ~96 GiB as dedicated iGPU VRAM; the
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kernel sees the remainder (~30 GiB, `MemTotal`). GRUB adds no memory
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options (`iommu=pt` only).
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The ROCm runtime reports 96 GiB VRAM. **Vulkan (RADV) reports a
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111.2 GiB heap** (113910 MiB) because it can also reach system memory
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through the GTT. For a model near 100 GiB, Vulkan is the only backend
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with room. `--list-devices` shows the heap:
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```
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ROCm0: AMD Radeon Graphics (98304 MiB)
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Vulkan0: AMD Radeon Graphics (RADV STRIX_HALO) (113910 MiB)
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```
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## Memory Fit (Q6_K = 98.26 GiB)
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| Item | Size |
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| ---- | ---- |
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| Vulkan heap (llama.cpp view) | ~111.2 GiB |
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| Model Q6_K file | 98.26 GiB |
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| Model + MTP + graphs in heap | ~98.7 GiB |
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| Free heap after load | ~10 GiB |
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Ling uses gated MLA and KDA attention. KV cache stays tiny: 256k total
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context costs only ~2.5 GiB. This is why 256k context fits.
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## Freeze Bug (2026-08-14) - Spec Path Deadlock
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### Symptom
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Under 2+ concurrent streams with speculative decoding, one stream hard-freezes
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mid-generation (zero output for minutes; a deadlock, not slowness). Freeze
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point varies (385-1588 tokens). Single streams never freeze.
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### Isolated cause
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- Not context exhaustion: `truncated = 0`, under 131072 ctx.
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- Not batch (3072 and 8192 both froze) and not log verbosity (0 and 4 both).
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- `parallel=2` + `draft-mtp,ngram-mod` -> freeze. SPEC OFF -> no freeze.
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- Culprit: the speculative-decode / context-checkpoint path in llama-server
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with multiple slots on the Vulkan backend. Known bug family: PR #24891,
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#24797 (server checkpoint fixes), #25144 (MTP draft crash), plus a
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ggml-vulkan hang-under-sustained-compute class.
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### Resolution: SPEC OFF
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`SPEC_TYPE=none`, `PARALLEL=2`. All concurrent streams complete (EOS).
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Speed cost: ~10-13 t/s under contention vs ~28-32 t/s single-stream with
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MTP. Fallback chain if spec-off regresses: A) `PARALLEL=1` keep MTP,
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B) switch back to Qwen3.6-27B (frank-large, MTP n_max 3).
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## Files
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- `scripts/frank-large-ling.service` - systemd unit.
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- `scripts/serve-ling-flash.sh` - serve script (fork binary, Vulkan,
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draft-mtp).
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- `scripts/frank-large.ling.env` - tunables.
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Passwordless management is installed:
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`/usr/local/sbin/frank-restart-ling.sh` and `/etc/sudoers.d/frank-ling`.
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## Switch Back (obsolete)
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The switch-back commands below are obsolete. At retirement time
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`frank-large` ran the Qwen3.8-27B pipeline-parallel head. To restore a Ling trial,
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re-enable `frank-large-ling` from the repo unit
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(`scripts/frank-large-ling.service`) and serve script
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(`scripts/serve-ling-flash.sh`), then start it on a non-conflicting port.
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## Caveats
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- The `bailingmoe3` fork validates CPU and CUDA upstream. Vulkan was
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validated here (load + generation + concurrent streams) on 2026-08-14.
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- The tokenizer logs `special_eos_id is not in special_eog_ids` at load.
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It is a warning; generation stops correctly at EOS.
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- Physical RAM pressure stays low because the model fits in the UMA
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carve-out. Generation speed on this APU is below the Qwen3.6-27B MTP
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config (~7.7 vs ~15-19 t/s at 4k).
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- The heap is effectively full (98.7 of 111.2 GiB). Do not raise the
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context much without checking `--list-devices` free MiB.
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## See Also
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- [[frank-large-benchmark]]
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- [[DFlash DSpark Speculative Decoding]]
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- [[deployment]]
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