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Liger

Multi-token attention · k = 3 · seq = 256 · batch = 2 · heads_in = 4 · heads_out = 4 · bf16 · run 01a0202b-2198…
●passedReported evidence

Not re-observed recently.

Primary measurement
259.1µsmedian

Rank 2 in its comparison group · source-native comparison · observed 2025-04-28

Compare with #1 →

ms 20 0.24391679465770721 · ms 50 0.2590720057487488 · ms 80 0.30832639336586

Identity
implementationLiger
projectLiger-Kernel
revisionunknown
workloadk = 3 · seq = 256 · batch = 2 · heads_in = 4 · heads_out = 4 · bf16
comparison keysha256:079c06de19988a5a…
sourceLiger-Kernel benchmarks
external idmulti_token_attention/backward/liger/nvidia-geforce-rtx-3090/batch2-heads_in4-heads_out4-k3-seq256-bf16/2025-04-28-04-46-14
sha256:b8e4aefde6b59627c672970…

Correctness

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

Workload

k3
seq256
batch2
heads_in4
heads_out4
biasbf16 [4]
scoresbf16 [2, 4, 256, 256]
weightbf16 [4, 4, 3, 3]
definition comparatornot_asserted

Measurements

latency · median259.1 µs
latency · p20243.9 µs
latency · p80308.3 µs

Protocol

harnessLiger-Kernel benchmark scripts
timercuda_events
primaryStatisticmedian
comparabilityFamilyliger_kernel_bench

Environment

gpuNVIDIA GeForce RTX 3090 (sm_86)

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": 259072
        },
        "primaryStatistic": "median"
      },
      "observedAt": "2025-04-28T04:46:14.000Z",
      "measurements": [
        {
          "unit": "ns",
          "value": 243917,
          "metric": "latency",
          "statistic": "p20"
        },
        {
          "unit": "ns",
          "value": 308326,
          "metric": "latency",
          "statistic": "p80"
        }
      ],
      "sourceNative": {
        "source": "liger-kernel-bench",
        "metrics": {
          "ms_20": 0.24391679465770721,
          "ms_50": 0.2590720057487488,
          "ms_80": 0.30832639336586
        },
        "benchmark": "multi_token_attention/backward",
        "externalId": "multi_token_attention/backward/liger/nvidia-geforce-rtx-3090/batch2-heads_in4-heads_out4-k3-seq256-bf16/2025-04-28-04-46-14"
      },
      "protocolDigest": "sha256:080e6e66e4ec75a131aa0c9121c74b8e8eed64e7b6d621d567c6a28f79548be8",
      "workloadDigest": "sha256:3d70cc62f438033d46c527dd71cb43ab59ba9414c17c670ace3cb67e62744cc2",
      "environmentDigest": "sha256:b12fdfab6a337672499b10212a1e986e49e4383777bd7cbb58321b09af4bf6a3",
      "implementationDigest": "sha256:e1ceb494ae4e51bbeb1012eaf8c69999502f3336c84232c2a9077090ae8afa05"
    },
    "metadata": {
      "name": "liger-multi-token-attention-backward-liger-nvidia-geforce-rtx-3090-batch2-heads-in4-heads-out4-k3-se",
      "title": "Multi-token attention · liger · backward",
      "labels": {
        "liger_version": "0.1.1"
      }
    },
    "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 backward pass of the module output given a random upstream gradient, 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-backward",
      "title": "Liger benchmark harness · backward pass"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "environment": {
    "kind": "ExecutionEnvironment",
    "spec": {
      "hardware": {
        "vendor": "nvidia",
        "product": "NVIDIA GeForce RTX 3090",
        "architecture": "sm_86"
      },
      "software": {}
    },
    "metadata": {
      "name": "liger-bench-nvidia-geforce-rtx-3090",
      "title": "Liger benchmark host · GeForce RTX 3090"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}
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