whn09 380e160b4b Neuron flash_mla: round attention P to bf16 like the CUDA kernels
The pure-torch sparse attention followed FlashMLA's tests/ref.py (fp32 P).
The CUDA kernels (sm100 prefill phase1.cuh:238-253) and the official
reference round P = exp(s - running_max) to bf16 before the P@V GEMM in an
online softmax; do the same with 64-key blocks.

Localized with examples/neuron/probe_layer0.py (per-op reference vs DeepInfer
capture): layer 0 is now bit-exact up to two rounding points that are
DeepInfer's own GPU/Ascend behaviour (SwiGLU -> FP8 from fp32, bf16 routed
partial in the MoE combine). CPU end-to-end on the tiny checkpoint: 26/27
greedy tokens match the reference, the miss being a 0.0096-margin step the
reference flips against itself.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-20 20:48:36 +08:00
..
_C initial commit 2026-10-20 12:09:42 +08:00
distributed initial commit 2026-10-20 12:09:42 +08:00
engine initial commit 2026-10-20 12:09:42 +08:00
entrypoints initial commit 2026-10-20 12:09:42 +08:00
hugging_face initial commit 2026-10-20 12:09:42 +08:00
model_executor Neuron basic mode — part 3: end-to-end check vs the official reference 2026-10-20 20:20:02 +08:00
neuron_ops Neuron flash_mla: round attention P to bf16 like the CUDA kernels 2026-10-20 20:48:36 +08:00
npu_ops initial commit 2026-10-20 12:09:42 +08:00
structure_output initial commit 2026-10-20 12:09:42 +08:00
ve initial commit 2026-10-20 12:09:42 +08:00
worker initial commit 2026-10-20 12:09:42 +08:00
__init__.py Add AWS Trainium (Neuron) platform, basic mode — part 1 2026-10-20 18:34:51 +08:00
attrdict.py initial commit 2026-10-20 12:09:42 +08:00
config.py initial commit 2026-10-20 12:09:42 +08:00
environ.py Add AWS Trainium (Neuron) platform, basic mode — part 1 2026-10-20 18:34:51 +08:00
load_class.py initial commit 2026-10-20 12:09:42 +08:00
logger.py initial commit 2026-10-20 12:09:42 +08:00
model_config_loader.py initial commit 2026-10-20 12:09:42 +08:00
multimodal_tokens.py initial commit 2026-10-20 12:09:42 +08:00
platform.py Add AWS Trainium (Neuron) platform, basic mode — part 1 2026-10-20 18:34:51 +08:00
py.typed initial commit 2026-10-20 12:09:42 +08:00
sampling_params.py initial commit 2026-10-20 12:09:42 +08:00
sequence.py initial commit 2026-10-20 12:09:42 +08:00
shared_memory.py initial commit 2026-10-20 12:09:42 +08:00
testing.py initial commit 2026-10-20 12:09:42 +08:00
timer.py initial commit 2026-10-20 12:09:42 +08:00
utils.py Neuron basic mode — part 3: end-to-end check vs the official reference 2026-10-20 20:20:02 +08:00