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Liger fused

Fused add + RMSNorm · rows = 2048 · hidden = 2048 · fp32 · run 01a016af-1e20…
●passedReported evidence
Primary measurement
47.2µsmedian

Rank 2 in its comparison group · source-native comparison · observed 2026-04-07

Compare with #1 →

ms 20 0.0461760014295578 · ms 50 0.047200001776218414 · ms 80 0.04927999898791313

Identity
implementationLiger fused
projectLiger-Kernel
revisionunknown
workloadrows = 2048 · hidden = 2048 · fp32
comparison keysha256:184ffc41d6035b18…
sourceLiger-Kernel benchmarks
external idfused_add_rms_norm/forward/liger_rms_norm/nvidia-h100-80gb-hbm3/hidden2048-rows2048-fp32/2026-04-07-21-27-26
sha256:955128ca56f42c29c2317c0…

Correctness

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

Workload

rows2048
hidden2048
xfp32 [2048, 2048]
weightfp32 [2048]
residualfp32 [2048, 2048]
definition comparatornot_asserted

Measurements

latency · median47.2 µs
latency · p2046.2 µs
latency · p8049.3 µs

Protocol

harnessLiger-Kernel benchmark scripts
timercuda_events
primaryStatisticmedian
comparabilityFamilyliger_kernel_bench

Environment

gpuNVIDIA H100 (sm_90)

Artifacts

No artifacts published with this run.

Replications and notes

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Canonical manifest

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{
  "run": {
    "kind": "BenchmarkRun",
    "spec": {
      "status": "passed",
      "timing": {
        "latencyNs": {
          "median": 47200
        },
        "primaryStatistic": "median"
      },
      "observedAt": "2026-04-07T21:27:26.000Z",
      "measurements": [
        {
          "unit": "ns",
          "value": 46176,
          "metric": "latency",
          "statistic": "p20"
        },
        {
          "unit": "ns",
          "value": 49280,
          "metric": "latency",
          "statistic": "p80"
        }
      ],
      "sourceNative": {
        "source": "liger-kernel-bench",
        "metrics": {
          "ms_20": 0.0461760014295578,
          "ms_50": 0.047200001776218414,
          "ms_80": 0.04927999898791313
        },
        "benchmark": "fused_add_rms_norm/forward",
        "externalId": "fused_add_rms_norm/forward/liger_rms_norm/nvidia-h100-80gb-hbm3/hidden2048-rows2048-fp32/2026-04-07-21-27-26"
      },
      "protocolDigest": "sha256:a79eaf4df66c97c6adc1fb2d09df78682155d1ea86652ae0b70199875bde7747",
      "workloadDigest": "sha256:40090c2dff70ced4ccaf2fc9bc834ac2b27049720d7999d915ff9123ac39cf21",
      "environmentDigest": "sha256:2750ae381d6de582f1eb6b9008e0987463d19ede8af127d97d76c5ae09121393",
      "implementationDigest": "sha256:9b417b271806017a7e78c087a31c17a4633f00e5df9c8b3c227d337c5aea8505"
    },
    "metadata": {
      "name": "liger-fused-add-rms-norm-forward-liger-rms-norm-nvidia-h100-80gb-hbm3-hidden2048-rows2048-fp32-2026-",
      "title": "Fused add + RMSNorm · liger_rms_norm · forward",
      "labels": {
        "liger_version": "0.7.0"
      }
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "protocol": {
    "kind": "BenchmarkProtocol",
    "spec": {
      "harness": {
        "name": "Liger-Kernel benchmark scripts",
        "repository": "https://github.com/linkedin/Liger-Kernel"
      },
      "measurement": {
        "timer": "cuda_events",
        "primaryStatistic": "median"
      },
      "comparability": {
        "notes": "Timed: the module forward pass, via triton.testing.do_bench with quantiles 0.5/0.2/0.8 (median with p20/p80 spread). The upstream CSV records no CUDA, driver, or torch version; the Liger release rides each run's labels. Comparable only within one kernel, workload, timed pass, and GPU.",
        "family": "liger_kernel_bench"
      }
    },
    "metadata": {
      "name": "liger-bench-do-bench-forward",
      "title": "Liger benchmark harness · forward pass"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "environment": {
    "kind": "ExecutionEnvironment",
    "spec": {
      "hardware": {
        "vendor": "nvidia",
        "product": "NVIDIA H100",
        "formFactor": "80GB HBM3",
        "architecture": "sm_90"
      },
      "software": {}
    },
    "metadata": {
      "name": "liger-bench-nvidia-h100-80gb-hbm3",
      "title": "Liger benchmark host · H100 80GB HBM3"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}
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