file stringlengths 26 26 | meta dict | flash_out dict | k dict | q dict | v dict | md5 stringlengths 32 32 | bytes int64 619M 619M |
|---|---|---|---|---|---|---|---|
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step00_block39.safetensors | {
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step20_block00.safetensors | {
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step20_block33.safetensors | {
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step20_block34.safetensors | {
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step20_block39.safetensors | {
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step39_block00.safetensors | {
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step39_block33.safetensors | {
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step39_block34.safetensors | {
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step39_block39.safetensors | {
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YAML Metadata Warning:empty or missing yaml metadata in repo card
Check out the documentation for more information.
Wan2.2-T2V-A14B — BF16 flash-attention captures (truth set)
In-model QKV inputs and BF16 flash attention outputs captured from Wan2.2-T2V-A14B (81 frames, 40 steps, seed 42), taken during development of low-precision (MXFP4) block-sparse attention with nucleus (top-p) block routing. Intended for offline evaluation of block-sparse routing against full BF16 attention truth.
Files
12 × step{NN}_block{MM}.safetensors = 4 attention blocks {0, 33, 34, 39} × 3 denoise
steps {0, 20, 39} (these blocks are the forced-BF16-fallback / known-sensitive set
from the sparse work; steps span early / mid / late in the 40-step schedule).
Each file contains 4 tensors:
| tensor | shape | dtype | meaning |
|---|---|---|---|
q |
[8, 75600, 128] |
BF16 | query, HND (heads-first; transposed from the kernel's NHD layout) |
k |
[8, 75600, 128] |
BF16 | key |
v |
[8, 75600, 128] |
BF16 | value |
flash_out |
[8, 75600, 128] |
BF16 | attention output of the BF16 flash kernel on the same q/k/v — the truth |
Dimensions: 8 heads = heads 0–7, a deliberate subset of the model's 40 attention
heads (routing error is measured per query row and per head independently; the subset
keeps the set at ~7 GiB instead of ~35 GiB). S = 75600 = the full post-patchify
sequence for 81 frames at 1280×720 — latent grid 21×45×80 (temporal (81−1)/4+1=21,
spatial 90×160 latents patched 2×2), with no sequence sharding at the attention call.
128 = head dim (model inner dim 5120 = 40×128).
Positive CFG pass only (first pass of each step). All tensors verified finite;
per-file shapes/rms/md5 in captures_manifest.json.
Provenance
- Captured 2026-10-12 with an env-gated in-model hook in a vLLM-Omni-style Wan launch harness, single-card full sequence (no TP). Generation was the MXFP4-weight full-pipeline run; attention at the captured blocks was forced to BF16 flash (the ship "fallback strategy").
- Use case: replay nucleus routing (
keep = max(20% floor, smallest softmax-pool prefix ≥ top_p)at QPOOL 128/256/512) or fixed-k on these q/k/v and measure output error vsflash_outdirectly, without running the 454 s model.
Ship sparse configs these captures were made around: Wan QPOOL=256 / p=0.875 / floor 20% (model-level frame-cos vs dense 0.8865 mean, 1.16× speedup).
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