{ "device": "NVIDIA GB10", "torch": "2.9.1+cu130", "cutlass_dsl": "4.6.2", "metadata": { "width": 1344, "height": 768, "frames": 124, "steps": 12, "sampler_step": 1, "seed": 440420, "text_tokens": 100, "hidden_shape": [ 37810, 5376 ], "segments": [ [ 0, 100, 1 ], [ 100, 514, 2 ], [ 514, 37810, 0 ] ] }, "linear": "attn_out_proj", "rows": 128, "mnk": [ 128, 5376, 7168 ], "tile_shape_mnk": [ 128, 128, 128 ], "swap_nibbles": false, "reencode_fp4": true, "zero_a": false, "cute_shapes": { "a": "(128, 7168, 1)", "b": "(5376, 7168, 1)", "sfa": "(128, 448, 1)", "sfb": "(5376, 448, 1)", "c": "(128, 5376, 1)" }, "tensor_scales": { "a": 0.0263671875, "b": 0.00072479248046875, "alpha": 1.911073923110962e-05 }, "raw_output": { "dtype": "torch.bfloat16", "checksum": 13503609856.0, "max_abs": 71827456.0, "nonzero": 688128, "finite": true }, "raw_blockscaled_parity": { "reference_checksum": 13503609856.0, "candidate_checksum": 13503609856.0, "equal": true, "max_abs": 0.0, "mean_abs": 0.0 }, "reference_checksum": 257945.5, "candidate_checksum": 258224.125, "equal": false, "max_abs": 8.0, "mean_abs": 0.07462421804666519, "relative_l2": 0.0028051051776856184, "numerical_note": "The stock SM121 kernel's validated BF16 epilogue rounds before the external global-scale product. Exact H3 integration requires applying alpha in a custom epilogue before BF16 conversion." }