Run 01a0032f · KernelIndex

Primary measurement

212.9µsmean

Rank 3 in its comparison group · source-native comparison · observed 2026-07-12

Compare with #1 →

SOL 0.6336 · 1.62× reference · 17/18 cases faster

Identity

implementationac4k

projectac4k

revisionsubmission-21924

workloadsuite of 18 cases · mean latency

comparison keysha256:34be9838a850e7e4…

sourceNVIDIA SOL-ExecBench

external idsubmission/21924

sha256:0bac536846d0c82f46a4abe…

Correctness

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

Workload

definition comparatorsol_execbench_eval

descriptionCorrectness must pass on every case in the SOL evaluation stack.

Measurements

latency · mean212.9 µs

Protocol

harnessSOL-ExecBench evaluation stack v1.1

timerharness_reported

primaryStatisticmean

correctnessReferencedefinition reference implementation

comparabilityFamilysol_execbench_leaderboard

Environment

gpuNVIDIA B200 (sm_100)

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": {
          "mean": 212889
        },
        "primaryStatistic": "mean"
      },
      "observedAt": "2026-07-12T09:03:06.378Z",
      "sourceNative": {
        "source": "sol-execbench",
        "metrics": {
          "sol_score": 0.633639,
          "latency_ms": 0.212889,
          "avg_speedup": 1.6213,
          "fast_1_count": 17,
          "fast_1_total": 18
        },
        "benchmark": "067_flash_attention_gqa_ultralong",
        "externalId": "21924"
      },
      "protocolDigest": "sha256:6383f62490dad270ad2146a94f67b48fba5cfcbc0b9b180f02665c69cc4433a0",
      "workloadDigest": "sha256:71b2079de94aeaef1b065bf14c87c9a1856213fed197e57c377ff0def3203d08",
      "environmentDigest": "sha256:f304afb2fedab4bbeadf8ac36a990ff517ab6e824dfe5a3ee0fe46259ff5e39f",
      "implementationDigest": "sha256:84a73a5a01d8b8c604459309ca0f0bae86ef8dea96a0045779ed67bc7cf62d68"
    },
    "metadata": {
      "name": "sol-submission-21924",
      "title": "ac4k · 067_flash_attention_gqa_ultralong · B200",
      "labels": {
        "worker": "external-prod-b200-modal-1"
      }
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "protocol": {
    "kind": "BenchmarkProtocol",
    "spec": {
      "harness": {
        "name": "SOL-ExecBench evaluation stack",
        "version": "v1.1"
      },
      "correctness": {
        "reference": "definition reference implementation",
        "comparator": "sol_execbench_eval"
      },
      "measurement": {
        "timer": "harness_reported",
        "primaryStatistic": "mean"
      },
      "comparability": {
        "notes": "Suite-mean latency and SOL-Score as published by the SOL-ExecBench leaderboard. Comparable only within one definition, GPU type, and evaluation stack version.",
        "family": "sol_execbench_leaderboard"
      }
    },
    "metadata": {
      "name": "sol-execbench-leaderboard-v1-1",
      "title": "SOL-ExecBench evaluation stack v1.1"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "environment": {
    "kind": "ExecutionEnvironment",
    "spec": {
      "hardware": {
        "vendor": "nvidia",
        "product": "NVIDIA B200",
        "architecture": "sm_100"
      },
      "software": {
        "libraries": {
          "evaluation_stack": "v1.1"
        }
      }
    },
    "metadata": {
      "name": "sol-execbench-b200-v1-1",
      "title": "SOL-ExecBench NVIDIA B200, stack v1.1"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}

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Published 2026-08-15 · NVIDIA SOL-ExecBenchAll results for Flash attention GQA ultralong →JSON