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PyTorch eager

cumsum reverse · batch_size = 32768 · fp32 · run 01a03f0e-f6d1…
●passedReported evidence

Not re-observed recently.

Primary measurement
11.4ms±0.01 · mean of 100

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

Compare with #1 →

max ms 11.7 · min ms 11.4 · std ms 0.0649 · mean ms 11.4

Identity
implementationPyTorch eager
projectPyTorch
revisionunknown
workloadbatch_size = 32768 · fp32
comparison keysha256:b922c123a78120a1…
sourceKernelBench baseline timings
external idH100_Modal/torch/level1/91_cumsum_reverse.py
sha256:1c356bf107c8a3da0cc8251…

Correctness

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

Workload

batch_size32768
input_1fp32 [32768, 32768]
definition comparatornot_asserted

Measurements

latency · max11.7 ms · n=100
latency · mean11.4 ms · n=100
latency · min11.4 ms · n=100
latency · std64.9 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
{
  "run": {
    "kind": "BenchmarkRun",
    "spec": {
      "status": "passed",
      "timing": {
        "samples": 100,
        "latencyNs": {
          "mean": 11400000,
          "maximum": 11700000,
          "minimum": 11400000,
          "confidence95": [
            11400000,
            11412720
          ]
        },
        "primaryStatistic": "mean"
      },
      "observedAt": "2026-03-05T08:38:15.000Z",
      "measurements": [
        {
          "unit": "ns",
          "value": 64900,
          "metric": "latency",
          "statistic": "std"
        }
      ],
      "sourceNative": {
        "source": "kernelbench",
        "metrics": {
          "max_ms": 11.7,
          "min_ms": 11.4,
          "std_ms": 0.0649,
          "mean_ms": 11.4
        },
        "benchmark": "H100_Modal/baseline_time_torch.json",
        "externalId": "H100_Modal/torch/level1/91_cumsum_reverse.py"
      },
      "protocolDigest": "sha256:547725b033a9911eae0c5ac362344a85aed824894ed4ab476af945b9bb491ea6",
      "workloadDigest": "sha256:a7e1187f6a4c4db1babbccf35d49c0dacfa4cfe4ac3366cdbdabde2ec5eb0bce",
      "environmentDigest": "sha256:2750ae381d6de582f1eb6b9008e0987463d19ede8af127d97d76c5ae09121393",
      "implementationDigest": "sha256:b2c3b33d3d24a38e55648421dfe179dc34594503f6798527a909f219d2d7dbd9"
    },
    "metadata": {
      "name": "kernelbench-h100-modal-torch-l1-91-cumsum-reverse",
      "title": "cumsum reverse · PyTorch eager · Modal"
    },
    "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"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "environment": {
    "kind": "ExecutionEnvironment",
    "spec": {
      "hardware": {
        "vendor": "nvidia",
        "product": "NVIDIA H100",
        "formFactor": "80GB HBM3",
        "architecture": "sm_90"
      },
      "software": {}
    },
    "metadata": {
      "name": "kernelbench-h100-modal",
      "title": "KernelBench host · H100 80GB HBM3 (Modal)"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}
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