{
  "device": "NVIDIA GB10",
  "compute_capability": "SM121",
  "workload": {
    "resolution": [1344, 768],
    "frames": 124,
    "packed_tokens": 37810,
    "block": 24,
    "attention": "sage2",
    "seed": 440420
  },
  "configuration": {
    "H3_NVFP4_SCALE_BACKEND": "vortex",
    "H3_NVFP4_SCALE_VERSION": "1",
    "H3_FUSED_ELEMENTWISE": "1",
    "H3_NVFP4_MODULATE_FUSION": "1",
    "H3_NVFP4_SWIGLU_FUSION": "1",
    "H3_SAGE_QKV_LAYOUT": "strided_nhd"
  },
  "block_24": {
    "uninstrumented_module_p50_ms": 458.7751985236537,
    "nsight_gpu_span_ms": 465.779616,
    "kernel_time_ms": 465.695712,
    "kernel_launches": 41,
    "inter_kernel_idle_ms": 0.083904,
    "average_inter_kernel_idle_us": 2.098,
    "maximum_inter_kernel_idle_us": 3.36,
    "components": {
      "sage2": {"milliseconds": 268.224256, "percent": 57.59646247290334},
      "nvfp4_gemms": {"milliseconds": 125.113088, "percent": 26.865844966165376},
      "nvfp4_packing": {"milliseconds": 41.526688, "percent": 8.917129131736562},
      "norm_and_rope": {"milliseconds": 19.863552, "percent": 4.265349988878575},
      "remaining_gate_add": {"milliseconds": 10.940192, "percent": 2.349214673464719},
      "other": {"milliseconds": 0.027936, "percent": 0.005998732851428}
    },
    "producer_detail": {
      "modulated_qkv_and_fc1_ms": 13.041792,
      "swiglu_fc2_ms": 23.043104,
      "attention_output_pack_ms": 5.126112,
      "scale_finalize_and_zero_fill_ms": 0.31568,
      "standalone_modulation_kernels": 0,
      "standalone_swiglu_kernels": 0,
      "gate_add_kernels": 2
    },
    "allocation_and_conversion": {
      "positive_self_allocated_bytes_per_block": 8009578496,
      "aten_empty_calls_per_block": 44,
      "large_layout_copy_kernels": 0,
      "explicit_cuda_memcpy_ops": 0,
      "remaining_contiguous_calls_per_block": 4,
      "remaining_contiguous_shape": [3, 5376],
      "remaining_to_copy_calls_per_block": 2,
      "note": "Remaining contiguous and to-copy operations are small AdaLN/scalar conversions, not full activation layout materializations."
    }
  },
  "one_warmed_sampling_step": {
    "elapsed_seconds": 23.707971603027545,
    "gpu_span_seconds": 23.706977664,
    "kernel_time_seconds": 23.693982688,
    "kernel_launches": 2694,
    "inter_kernel_idle_ms": 12.994976,
    "average_inter_kernel_idle_us": 4.825,
    "maximum_inter_kernel_idle_ms": 6.395168,
    "peak_allocated_bytes": 15570401280,
    "peak_reserved_bytes": 18538823680,
    "explicit_cuda_memcpy_ops": 9,
    "explicit_cuda_memcpy_bytes": 15282118,
    "explicit_cuda_memcpy_ms": 0.169856,
    "components": {
      "sage2": {"milliseconds": 13760.566304, "percent": 58.07620645797613},
      "nvfp4_gemms": {"milliseconds": 6269.804512, "percent": 26.46158982455656},
      "nvfp4_packing": {"milliseconds": 2093.052672, "percent": 8.833688702997335},
      "norm_and_rope": {"milliseconds": 987.609696, "percent": 4.168187801117043},
      "remaining_gate_add": {"milliseconds": 545.150976, "percent": 2.3007992500817345},
      "other": {"milliseconds": 37.798528, "percent": 0.159528965271231}
    },
    "gpu_metrics": {
      "gr_active_average_percent": 99.57,
      "sms_active_average_percent": 99.27,
      "sm_issue_average_percent": 25.63,
      "tensor_active_average_percent": 53.72
    }
  },
  "memory_traffic": {
    "measurement_note": "GB10 Nsight exposes no direct physical DRAM-byte counter. L2 requested bytes are measured with lts__t_bytes.sum. The off-chip proxy is 32 bytes times warm-cache L2 read/write miss sectors with Nsight Compute cache control disabled.",
    "l2_requested_bytes": {
      "total": 320998821280,
      "sage2": 166126147104,
      "nvfp4_gemms": 132957604576,
      "nvfp4_packing": 14638661888,
      "norm_and_rope": 4802883392,
      "remaining_gate_add": 2472452288
    },
    "off_chip_request_proxy_bytes": {
      "total": 42116618176,
      "sage2": 6357343328,
      "nvfp4_gemms": 23690363008,
      "nvfp4_packing": 7685899232,
      "norm_and_rope": 2753536064,
      "remaining_gate_add": 1629476544
    },
    "off_chip_request_proxy_percent": {
      "sage2": 15.094619661610697,
      "nvfp4_gemms": 56.249442699793654,
      "nvfp4_packing": 18.249089230957726,
      "norm_and_rope": 6.537885004188424,
      "remaining_gate_add": 3.868963403449499
    }
  },
  "decision": {
    "time_bottleneck": "Sage2, led by the 246.629 ms attention mainloop in block 24.",
    "memory_traffic_bottleneck": "The four NVFP4 GEMMs, with 56.25% of the warm-cache off-chip request proxy.",
    "cpu_launch_bottleneck": false,
    "next_kernel": "No implementation target is selected solely from the old profile. Any next target must use this fresh split between Sage2 compute time and NVFP4 GEMM memory traffic."
  },
  "artifacts": [
    "benchmarks/gb10-fully-fused-block24-fresh.nsys-rep",
    "benchmarks/gb10-fully-fused-one-step-fresh.nsys-rep",
    "benchmarks/gb10-fully-fused-block24-fresh-capture.json",
    "benchmarks/gb10-fully-fused-block24-fresh-torch.json",
    "benchmarks/gb10-fully-fused-one-step-fresh.json",
    "benchmarks/gb10-fully-fused-block24-fresh-l2.csv",
    "benchmarks/gb10-fully-fused-block24-fresh-l2-misses-warm.csv"
  ]
}