Run 01a00b1d · KernelIndex

Primary measurement

421.9µsmean

Rank 1 in its comparison group · source-native comparison · observed 2026-03-28

8.27× reference

Identity

implementationflashinfer_wrapper_be0f02

projectFlashInfer-Bench baselines

revisionda915083d4c7c5e61aa3005e3d17ae488e0fc71c

workloadtotal_q = 291 · num_pages = 1728 · len_indptr = 2 · num_kv_indices = 291 · bf16

comparison keysha256:19f7793f2156d56d…

sourceFlashInfer-Bench

external idtrace/flashinfer_wrapper_be0f02/18b8aabb-f887-42e3-a1be-ea3f1314f03a

sha256:2530d4cd30a938133913e62…

Correctness

comparatorflashinfer_bench_eval

max absolute error0.000244140625

max relative error546.402587890625

resultpassed

Workload

total_q291

num_pages1728

len_indptr2

num_kv_indices291

qbf16 [291, 20, 128]

k_cachebf16 [1728, 64, 4, 128]

v_cachebf16 [1728, 64, 4, 128]

kv_indptrint32 [2]

qo_indptrint32 [2]

kv_indicesint32 [291]

kv_last_page_lenint32 [2]

definition comparatorsol_execbench_eval

Measurements

latency · mean421.9 µs

Protocol

harnessflashinfer-bench

timerharness_reported

primaryStatisticmean

correctnessReferencedefinition reference implementation

comparabilityFamilyflashinfer_bench_trace

Environment

gpuNVIDIA B200 (unknown)

cudaToolkit12.8

frameworkpytorch 2.9.1+cu128

Artifacts

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Replications and notes

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Community attestations. They never change the evidence level; only a KernelIndex-controlled rerun does.

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Canonical manifest

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{
  "run": {
    "kind": "BenchmarkRun",
    "spec": {
      "status": "passed",
      "timing": {
        "latencyNs": {
          "mean": 421867
        },
        "primaryStatistic": "mean"
      },
      "observedAt": "2026-03-28T16:30:18.968Z",
      "correctness": {
        "comparator": "sol_execbench_eval",
        "maximumAbsoluteError": 0.000244140625,
        "maximumRelativeError": 546.402587890625
      },
      "sourceNative": {
        "source": "flashinfer-bench",
        "metrics": {
          "latency_ms": 0.4218666652838389,
          "speedup_factor": 8.271946946214461,
          "reference_latency_ms": 3.4896586736043296
        },
        "benchmark": "gqa_paged_prefill_causal_h20_kv4_d128_ps64"
      },
      "protocolDigest": "sha256:7d44d206ad086b4bece35ce31f6531ebb11f07e0d9dcfb74c75be86d3ec02095",
      "workloadDigest": "sha256:4647e5849dee2e74b0a940d0c4e2056713c52c48bd26d4dcd4239d4bac0e077a",
      "environmentDigest": "sha256:af7cb68a0bb0eb9671092a620668c2600f0431301fc46a71807ea75fb7de8bce",
      "implementationDigest": "sha256:8581e76aee7a26b58e283064024877c531bf3fdd7bfdb3c7ff18771c13120755"
    },
    "metadata": {
      "name": "sol-trace-gqa-paged-prefill-causal-h20-kv4-d128-ps64-18b8aabb",
      "title": "flashinfer_wrapper_be0f02 · gqa_paged_prefill_causal_h20_kv4_d128_ps64"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "protocol": {
    "kind": "BenchmarkProtocol",
    "spec": {
      "harness": {
        "name": "flashinfer-bench",
        "repository": "https://github.com/flashinfer-ai/flashinfer-bench"
      },
      "correctness": {
        "reference": "definition reference implementation",
        "comparator": "flashinfer_bench_eval"
      },
      "measurement": {
        "timer": "harness_reported",
        "primaryStatistic": "mean"
      },
      "comparability": {
        "family": "flashinfer_bench_trace"
      }
    },
    "metadata": {
      "name": "flashinfer-bench-trace",
      "title": "FlashInfer-Bench trace harness"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "environment": {
    "kind": "ExecutionEnvironment",
    "spec": {
      "hardware": {
        "vendor": "nvidia",
        "product": "NVIDIA B200",
        "architecture": "unknown"
      },
      "software": {
        "framework": {
          "name": "pytorch",
          "version": "2.9.1+cu128"
        },
        "libraries": {
          "triton": "3.5.1"
        },
        "cudaToolkit": "12.8"
      }
    },
    "metadata": {
      "name": "sol-trace-nvidia-b200-2-9-1-cu128-3-5-1-12-8",
      "title": "NVIDIA B200 (trace-reported software)"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}

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Published 2026-08-16 · FlashInfer-Bench · Apache-2.0All results for GQA paged prefill causal h20 kv4 d128 ps64 →JSON

flashinfer / wrapperbe0f02