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Liger fused

Fused add + RMSNorm · rows = 2048 · hidden = 4096 · fp32 · run 01a016af-3e33…
●passedReported evidence
Primary measurement
361.6µsmedian

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

Compare with #1 →

ms 20 0.35577601194381714 · ms 50 0.36156800389289856 · ms 80 0.37151360511779785

Identity
implementationLiger fused
projectLiger-Kernel
revisionunknown
workloadrows = 2048 · hidden = 4096 · fp32
comparison keysha256:0079eb91bf77a99e…
sourceLiger-Kernel benchmarks
external idfused_add_rms_norm/full/liger_rms_norm/nvidia-h100-80gb-hbm3/hidden4096-rows2048-fp32/2026-04-07-21-27-36
sha256:fc08f0ded11d5ac516b6f42…

Correctness

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

Workload

rows2048
hidden4096
xfp32 [2048, 4096]
weightfp32 [4096]
residualfp32 [2048, 4096]
definition comparatornot_asserted

Measurements

latency · median361.6 µs
latency · p20355.8 µs
latency · p80371.5 µs

Protocol

harnessLiger-Kernel benchmark scripts
timercuda_events
primaryStatisticmedian
comparabilityFamilyliger_kernel_bench

Environment

gpuNVIDIA H100 (sm_90)

Artifacts

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Replications and notes

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Canonical manifest

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{
  "run": {
    "kind": "BenchmarkRun",
    "spec": {
      "status": "passed",
      "timing": {
        "latencyNs": {
          "median": 361568
        },
        "primaryStatistic": "median"
      },
      "observedAt": "2026-04-07T21:27:36.000Z",
      "measurements": [
        {
          "unit": "ns",
          "value": 355776,
          "metric": "latency",
          "statistic": "p20"
        },
        {
          "unit": "ns",
          "value": 371514,
          "metric": "latency",
          "statistic": "p80"
        }
      ],
      "sourceNative": {
        "source": "liger-kernel-bench",
        "metrics": {
          "ms_20": 0.35577601194381714,
          "ms_50": 0.36156800389289856,
          "ms_80": 0.37151360511779785
        },
        "benchmark": "fused_add_rms_norm/full",
        "externalId": "fused_add_rms_norm/full/liger_rms_norm/nvidia-h100-80gb-hbm3/hidden4096-rows2048-fp32/2026-04-07-21-27-36"
      },
      "protocolDigest": "sha256:5b02ee9a2140fbc6fcc1c89800f6c177ba22718c8897cb532bf0ba91867c1e58",
      "workloadDigest": "sha256:d480d00c99a1adff0dacb94d52af9bc3daa6b9850d16c1f466b51f4807d4b33b",
      "environmentDigest": "sha256:2750ae381d6de582f1eb6b9008e0987463d19ede8af127d97d76c5ae09121393",
      "implementationDigest": "sha256:9b417b271806017a7e78c087a31c17a4633f00e5df9c8b3c227d337c5aea8505"
    },
    "metadata": {
      "name": "liger-fused-add-rms-norm-full-liger-rms-norm-nvidia-h100-80gb-hbm3-hidden4096-rows2048-fp32-2026-04-",
      "title": "Fused add + RMSNorm · liger_rms_norm · full",
      "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 forward pass plus the backward 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-full",
      "title": "Liger benchmark harness · full 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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