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gpt-5 / cuda00b2dd

GQA paged decode h32 kv4 d128 ps1 · num_pages = 33183 · batch_size = 64 · len_indptr = 65 · num_kv_indices = 33167 · bf16 · run 01a02032-578d…
●passedReported evidence

Not re-observed recently.

Primary measurement
3.07msmean

Rank 4 in its comparison group · source-native comparison · observed 2025-10-16

Compare with #1 →

641.32× reference

Identity
implementationgpt-5_cuda_00b2dd
projectgpt-5-2025-08-07
revisionda915083d4c7c5e61aa3005e3d17ae488e0fc71c
workloadnum_pages = 33183 · batch_size = 64 · len_indptr = 65 · num_kv_indices = 33167 · bf16
comparison keysha256:6fb48d5cd2a3794a…
sourceFlashInfer-Bench
external idtrace/gpt-5_cuda_00b2dd/75643386-e1af-43d9-82bf-badbf5a9b877
sha256:9987d5f571be35fefaa9931…

Correctness

comparatorflashinfer_bench_eval
max absolute error0.001953125
max relative error0.1872885525226593
resultpassed

Workload

num_pages33183
batch_size64
len_indptr65
num_kv_indices33167
qbf16 [64, 32, 128]
k_cachebf16 [33183, 1, 4, 128]
v_cachebf16 [33183, 1, 4, 128]
kv_indptrint32 [65]
kv_indicesint32 [33167]
definition comparatorsol_execbench_eval

Measurements

latency · mean3.07 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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Canonical manifest

Show manifest
{
  "run": {
    "kind": "BenchmarkRun",
    "spec": {
      "status": "passed",
      "timing": {
        "latencyNs": {
          "mean": 3066803
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        "primaryStatistic": "mean"
      },
      "observedAt": "2025-10-16T01:31:18.880Z",
      "correctness": {
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        "maximumAbsoluteError": 0.001953125,
        "maximumRelativeError": 0.1872885525226593
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    "metadata": {
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      "title": "gpt-5_cuda_00b2dd · gqa_paged_decode_h32_kv4_d128_ps1"
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  "protocol": {
    "kind": "BenchmarkProtocol",
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    "kind": "ExecutionEnvironment",
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      "title": "NVIDIA B200 (trace-reported software)"
    },
    "apiVersion": "kernelindex.dev/v1alpha1"
  }
}
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