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PyTorch eager

MinGPTCausalAttention · n_embd = 768 · seq_len = 512 · batch_size = 128 · fp32 · run 01a03f0e-f842…
●passedReported evidence

Not re-observed recently.

Primary measurement
19.7ms±0.11 · mean of 100

Rank 2 in its comparison group · source-native comparison · observed 2026-03-05

Compare with #1 →

max ms 20.8 · min ms 18.7 · std ms 0.584 · mean ms 19.7

Identity
implementationPyTorch eager
projectPyTorch
revisionunknown
workloadn_embd = 768 · seq_len = 512 · batch_size = 128 · fp32
comparison keysha256:c830006d0cf643de…
sourceKernelBench baseline timings
external idH100_PCIe_LambdaLabs/torch/level3/43_MinGPTCausalAttention.py
sha256:7713106dc872e306bf717e0…

Correctness

Marked passed by the source; the correctness policy was not published.

Workload

n_embd768
seq_len512
batch_size128
input_1fp32 [128, 512, 768]
definition comparatornot_asserted

Measurements

latency · max20.8 ms · n=100
latency · mean19.7 ms · n=100
latency · min18.7 ms · n=100
latency · std584.0 µs

Protocol

harnessKernelBench timing scripts
timercuda_events
primaryStatisticmean
comparabilityFamilykernelbench_baseline_timing

Environment

gpuNVIDIA H100 (sm_90)

Artifacts

No artifacts published with this run.

Replications and notes

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Canonical manifest

Show manifest
{
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    "kind": "BenchmarkRun",
    "spec": {
      "status": "passed",
      "timing": {
        "samples": 100,
        "latencyNs": {
          "mean": 19700000,
          "maximum": 20800000,
          "minimum": 18700000,
          "confidence95": [
            19585536,
            19814464
          ]
        },
        "primaryStatistic": "mean"
      },
      "observedAt": "2026-03-05T08:38:15.000Z",
      "measurements": [
        {
          "unit": "ns",
          "value": 584000,
          "metric": "latency",
          "statistic": "std"
        }
      ],
      "sourceNative": {
        "source": "kernelbench",
        "metrics": {
          "max_ms": 20.8,
          "min_ms": 18.7,
          "std_ms": 0.584,
          "mean_ms": 19.7
        },
        "benchmark": "H100_PCIe_LambdaLabs/baseline_time_torch.json",
        "externalId": "H100_PCIe_LambdaLabs/torch/level3/43_MinGPTCausalAttention.py"
      },
      "protocolDigest": "sha256:547725b033a9911eae0c5ac362344a85aed824894ed4ab476af945b9bb491ea6",
      "workloadDigest": "sha256:6a79750947048c57a6ddd061ec26b81fb4bb31c13c6dd22bbba3a8993577a877",
      "environmentDigest": "sha256:89f9b28b06758f22a1df331fea58bfde2c9cc0f3627d1829509743ea538f0011",
      "implementationDigest": "sha256:8342088fda08f4acb1d5f0f14a8517e416cfe395beb8d50d811e6f9cea7a281c"
    },
    "metadata": {
      "name": "kernelbench-h100-pcie-lambdalabs-torch-l3-43-mingptcausalattention",
      "title": "MinGPTCausalAttention · PyTorch eager · Lambda Labs"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "protocol": {
    "kind": "BenchmarkProtocol",
    "spec": {
      "harness": {
        "name": "KernelBench timing scripts",
        "repository": "https://github.com/ScalingIntelligence/KernelBench"
      },
      "measurement": {
        "timer": "cuda_events",
        "primaryStatistic": "mean"
      },
      "comparability": {
        "notes": "Mean of 100 timed forward passes (CUDA events, warm-up excluded) of the reference module on fixed inputs; the 95% interval is the mean's, from the reported standard deviation. The upstream JSON records no torch or CUDA version. Comparable only within one problem and one timing host.",
        "family": "kernelbench_baseline_timing"
      }
    },
    "metadata": {
      "name": "kernelbench-timing-v1",
      "title": "KernelBench baseline timing"
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    "apiVersion": "kernelindex.dev/v1alpha1"
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  "environment": {
    "kind": "ExecutionEnvironment",
    "spec": {
      "hardware": {
        "vendor": "nvidia",
        "product": "NVIDIA H100",
        "formFactor": "PCIe",
        "architecture": "sm_90"
      },
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    },
    "metadata": {
      "name": "kernelbench-h100-pcie-lambdalabs",
      "title": "KernelBench host · H100 PCIe (Lambda Labs)"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}
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