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gpt-5 / cudac0b7b7

GQA ragged prefill causal h32 kv4 d128 · total_q = 969 · total_kv = 969 · len_indptr = 16 · bf16 · run 01a02032-595a…
●passedReported evidence

Not re-observed recently.

Primary measurement
25.0msmean

Rank 5 in its comparison group · source-native comparison · observed 2025-10-20

Compare with #1 →

1.60× reference

Identity
implementationgpt-5_cuda_c0b7b7
projectgpt-5-2025-08-07
revisionda915083d4c7c5e61aa3005e3d17ae488e0fc71c
workloadtotal_q = 969 · total_kv = 969 · len_indptr = 16 · bf16
comparison keysha256:d263e8051b2ab468…
sourceFlashInfer-Bench
external idtrace/gpt-5_cuda_c0b7b7/b3445888-8668-4721-9359-9da119ab9f34
sha256:16f859c975232fed5bcd03c…

Correctness

comparatorflashinfer_bench_eval
max absolute error0.0078125
max relative error0.6002562642097473
resultpassed

Workload

total_q969
total_kv969
len_indptr16
kbf16 [969, 4, 128]
qbf16 [969, 32, 128]
vbf16 [969, 4, 128]
kv_indptrint32 [16]
qo_indptrint32 [16]
definition comparatorsol_execbench_eval

Measurements

latency · mean25.0 ms

Protocol

harnessflashinfer-bench
timerharness_reported
primaryStatisticmean
correctnessReferencedefinition reference implementation
comparabilityFamilyflashinfer_bench_trace

Environment

gpuNVIDIA B200 (unknown)
cudaToolkit12.8
frameworkpytorch 2.8.0+cu128

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": {
          "mean": 24972117
        },
        "primaryStatistic": "mean"
      },
      "observedAt": "2025-10-20T01:08:36.531Z",
      "correctness": {
        "comparator": "sol_execbench_eval",
        "maximumAbsoluteError": 0.0078125,
        "maximumRelativeError": 0.6002562642097473
      },
      "sourceNative": {
        "source": "flashinfer-bench",
        "metrics": {
          "latency_ms": 24.97211742401123,
          "speedup_factor": 1.6028227384594347,
          "reference_latency_ms": 40.02587763468424
        },
        "benchmark": "gqa_ragged_prefill_causal_h32_kv4_d128"
      },
      "protocolDigest": "sha256:7d44d206ad086b4bece35ce31f6531ebb11f07e0d9dcfb74c75be86d3ec02095",
      "workloadDigest": "sha256:700527a4350d7f0e3c9cbd5650c827fc25e2a7bc5af80107e2db436a6ff8bcce",
      "environmentDigest": "sha256:f4292a8be127b7230cd3995c1d605fb6c644e2c2f94566e1d28cc1be766ca5d5",
      "implementationDigest": "sha256:bceb228b0a788c7dc54c438026739a09691a8b5b4c4fbb6cf2cc13dd45bfc50e"
    },
    "metadata": {
      "name": "sol-trace-gqa-ragged-prefill-causal-h32-kv4-d128-b3445888",
      "title": "gpt-5_cuda_c0b7b7 · gqa_ragged_prefill_causal_h32_kv4_d128"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  },
  "protocol": {
    "kind": "BenchmarkProtocol",
    "spec": {
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      },
      "correctness": {
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        "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": {
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        "architecture": "unknown"
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        "libraries": {
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    },
    "metadata": {
      "name": "sol-trace-nvidia-b200-2-8-0-cu128-3-4-0-12-8",
      "title": "NVIDIA B200 (trace-reported software)"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}
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