Document layout, chunks, prompt-id convention

README.md

@@ -1,16 +1,87 @@
-# commitmoe-qwen35-fp8-layers-v2
+---
+license: apache-2.0
+task_categories:
+- other
+tags:
+- mixture-of-experts
+- expert-routing
+- qwen3
+- inference-optimization
+size_categories:
+- 100M<n<1B
+configs:
+- config_name: default
+  data_files: layers_v1/*/labels/*.safetensors
+---
 
-Per-layer columnar streams for Qwen3.5-35B-A3B-FP8 expert-routing prediction.
+# CommitMoE — Qwen3.5-35B-A3B-FP8 expert-routing traces, columnar by layer
 
-Rebuilt from the raw collector shards so that **all 40 layers** are available in
-the columnar form, not only the L6 lead-2 slice.
+Per-token MoE routing decisions from `Qwen/Qwen3.5-35B-A3B-FP8`, laid out
+**one directory per layer** so a predictor for a single layer reads only what it
+needs instead of scanning interleaved shards.
 
-- `layers_v1/chunk_10k/` — corpus prompts 0-9,999, rebuilt from `raw` shards
-  (source list taken from `index_10k.pt`, 3,126 shards; note the collector's
-  `manifest.jsonl` is stale at 938 shards and must not be used as the source list)
+The model has **40 MoE layers, 256 experts each, top-8 routing**, hidden size
+2048. Every row is one `(prompt, decode token, layer)` triple.
 
-Layout per stream: `{hidden,logits}/layer=NN/part_*.safetensors`, plus `labels/`.
-Columns carry their own `prompt_idx` / `tok`, so joins key on values, never on
-row position.
+## What this is for
 
-Existing repos are untouched; this is an additive republish.
+Predicting *which experts a layer will route to* a couple of layers ahead, so
+their weights can be prefetched over PCIe into a small GPU-resident cache
+before the layer runs. A prediction that misses costs a stall; the metric that
+matters is recall at the cache size `C`, and under a `W = C` admission policy
+the stall count per token per layer is exactly `8 · (1 − recall@C)`.
+
+## Layout
+
+```
+layers_v1/<chunk>/
+  prompts.jsonl                       # id + prompt_idx, one row per prompt
+  labels/part_*.safetensors           # top_indices[8], prompt_idx, tok, layer, gen_token_id
+  hidden/layer=NN/part_*.safetensors  # h[2048] (pre-MoE hidden), prompt_idx, tok
+  logits/layer=NN/part_*.safetensors  # logits[256] (router), prompt_idx, tok
+```
+
+`labels` covers all 40 layers in one table — it is small (~2.6 GB per 10k
+prompts) and window features read every layer of it. `hidden` is the expensive
+part at about **10.0 GB per layer per 10k prompts**; `logits` is **1.27 GB**.
+
+## Chunks and prompt ids
+
+`prompt_idx` is **globally unique across chunks**, so they can be pooled
+without collision:
+
+| chunk | prompts | `prompt_idx` range |
+|---|---|---|
+| `chunk_10k` | 10,000 | 0 – 9,999 |
+| `chunk00` | 4,000 | 10,000 – 13,999 |
+| `chunk01` | 6,000 | 14,000 – 19,999 |
+
+`chunk00` lives in the companion repo
+[`commitmoe-qwen35-fp8-layers`](https://huggingface.co/datasets/RASMUS/commitmoe-qwen35-fp8-layers).
+Each chunk's `prompts.jsonl` starts at its own base, and readers derive that
+base from the file's first row rather than assuming zero.
+
+**A note on the ids, because it is easy to get wrong.** The raw shards store
+`prompt_idx` as a *shard-local slot* (0–31, an index into that shard's own
+32-entry prompt list), not a global id. Writing it through unchanged collapses
+every shard's prompts onto the same 32 ids — silently, since the output still
+looks well-formed. The files here are built by resolving each shard's prompt-id
+*strings* through the chunk's index, and every upload is checked by comparing
+the written `prompt_idx` set against the set resolved from the shards.
+
+## How the shards were laid out upstream
+
+Each raw shard is a **decode-step slice** of a 32-prompt batch — 32 prompts ×
+~26 decode steps × 40 layers ≈ 32,768 rows — so roughly **ten consecutive raw
+shards share the same 32 prompts**. That is invisible in this columnar form but
+matters if you rebuild from the raw traces.
+
+## Splits
+
+Not stored. The split is derived from the prompt-id string, so it stays
+consistent across chunks and rebuilds.
+
+## Related
+
+- Raw interleaved traces: [`commitmoe-qwen35-fp8-expert-routing-traces`](https://huggingface.co/datasets/RASMUS/commitmoe-qwen35-fp8-expert-routing-traces)
+- `chunk00` + raw for `chunk00`/`chunk01`: [`commitmoe-qwen35-fp8-layers`](https://huggingface.co/datasets/RASMUS/commitmoe-qwen35-fp8-layers)