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The dataset generation failed
Error code:   DatasetGenerationError
Exception:    ArrowNotImplementedError
Message:      Cannot write struct type 'geometry' with no child field to Parquet. Consider adding a dummy child field.
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1868, in _prepare_split_single
                  num_examples, num_bytes = writer.finalize()
                                            ~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 803, in finalize
                  self.write_rows_on_file()
                  ~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 663, in write_rows_on_file
                  self._write_table(table)
                  ~~~~~~~~~~~~~~~~~^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 790, in _write_table
                  self._build_writer(inferred_schema=pa_table.schema)
                  ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 834, in _build_writer
                  self.pa_writer = pq.ParquetWriter(
                                   ~~~~~~~~~~~~~~~~^
                      self.stream,
                      ^^^^^^^^^^^^
                  ...<9 lines>...
                      },
                      ^^
                  )
                  ^
                File "/usr/local/lib/python3.14/site-packages/pyarrow/parquet/core.py", line 1115, in __init__
                  self.writer = _parquet.ParquetWriter(
                                ~~~~~~~~~~~~~~~~~~~~~~^
                      sink, schema,
                      ^^^^^^^^^^^^^
                  ...<20 lines>...
                      max_rows_per_page=max_rows_per_page,
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                      **options)
                      ^^^^^^^^^^
                File "pyarrow/_parquet.pyx", line 2430, in pyarrow._parquet.ParquetWriter.__cinit__
                File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
                  return check_status(status)
                File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
                  raise convert_status(status)
              pyarrow.lib.ArrowNotImplementedError: Cannot write struct type 'geometry' with no child field to Parquet. Consider adding a dummy child field.
              
              The above exception was the direct cause of the following exception:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
                  parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
                                                                        ~~~~~~~~~~~~~~~~~~~~~~~~~^
                      builder, max_dataset_size_bytes=max_dataset_size_bytes
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                  )
                  ^
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
                  builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
                  ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1694, in _prepare_split
                  for job_id, done, content in self._prepare_split_single(
                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~^
                      gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                  ):
                  ^
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1879, in _prepare_split_single
                  raise DatasetGenerationError("An error occurred while generating the dataset") from e
              datasets.exceptions.DatasetGenerationError: An error occurred while generating the dataset

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id
string
status
string
title
string
published
timestamp[s]
summary
string
hardware
dict
software
dict
model
dict
slo
dict
workload
dict
power
dict
accuracy
dict
runs
int64
variance_band_pct
float64
fleet
dict
configs
list
not_covered
list
reproduce
string
spec
dict
h100-qwen3-30b-a3b-fp8-vllm-0-31
published
Qwen3-30B-A3B FP8 on 1× H100 SXM with vLLM 0.31.0
2026-10-06T00:00:00
Full-mode measurement on a Lambda Cloud 1× H100 SXM5 instance: 10-minute windows, 5 repeats at the SLO boundary, GSM8K 5-shot on 200 items × 3 seeds. Default vLLM configuration with a BF16 KV cache. Energy is GPU board power.
{ "vendor": "NVIDIA", "accelerator": "NVIDIA H100 80GB HBM3", "count": 1, "rated_bw_tbs_per_gpu": 3.35, "driver": "580.105.08", "host": "Lambda Cloud instance" }
{ "engine": "vLLM", "engine_version": "0.31.0", "kernels": "vllm/vllm-openai:latest" }
{ "name": "Qwen3-30B-A3B-FP8", "shape": "MoE", "quantization": "FP8 weights, BF16 KV cache", "parallelism": "1 replica × TP1" }
{ "ttft_p99_ms": 2000, "tpot_p99_ms": 50 }
{ "trace": "chat-mix-v1", "input_tokens": "median 1,024 · p90 4,096", "output_tokens": "median 256 · p90 1,024", "arrival": "Poisson, rate swept to SLO boundary" }
{ "source": "GPU board power sum (NVIDIA)", "kind": "board", "sampling_hz": 1, "window": "600 s steady state" }
{ "suite": "gsm8k-5shot", "threshold_pts": 1 }
5
2.2
{ "cards": 64 }
[ { "key": "baseline", "label": "vllm-default", "engine": "vLLM 0.31.0 · KV BF16", "mbu_pct": 58.1, "node_power_kw": 0.601, "goodput_tok_s": 3995.9, "ttft_p99_ms": 327, "tpot_p99_ms": 37.3, "slo_pass_count": 5, "repeats": 5, "throttle_counts": { "sw_power_cap": 1870 ...
[ "Whole-node power (no BMC access on this host)", "Context lengths beyond the chat-mix-v1 trace" ]
tokenwatt run --spec lambda-qwen3-30b-a3b-fp8-tp1-dp1.spec.yaml --label 'vllm-default' --role baseline --out runs/vllm-default.json tokenwatt report runs/vllm-default.json --title 'Qwen3-30B-A3B FP8 on 1× H100 SXM with vLLM 0.31.0'
{ "name": "lambda-qwen3-30b-a3b-fp8-tp1-dp1", "hardware": { "adapter": "nvidia", "rated_bw_tbs_per_gpu": null, "gpus": null, "host": "Lambda Cloud instance" }, "engine": { "endpoint": "http://127.0.0.1:8000/v1", "name": "vLLM", "version": "0.31.0", "kernels": "vllm/vllm-openai:la...
lab-h100-qwen3-30b-a3b-kv-cache
draft
Qwen3-30B-A3B FP8 on 1× H100: BF16 vs FP8 KV cache
2026-10-06T00:00:00
Validation run on a Lambda Cloud 1× H100 SXM5 instance with vLLM 0.31.0. Quick mode: 120 s windows, 2 repeats, 50 GSM8K items with one seed. FP8 KV cache raised SLO goodput and tokens per joule but failed the accuracy gate on this small suite.
{ "vendor": "NVIDIA", "accelerator": "NVIDIA H100 80GB HBM3", "count": 1, "rated_bw_tbs_per_gpu": 3.35, "driver": "580.105.08", "host": "Lambda Cloud instance" }
{ "engine": "vLLM", "engine_version": "0.31.0", "kernels": "vllm/vllm-openai:latest" }
{ "name": "Qwen3-30B-A3B-FP8", "shape": "MoE", "quantization": "FP8 weights; KV cache varies by configuration", "parallelism": "1 replica × TP1" }
{ "ttft_p99_ms": 2000, "tpot_p99_ms": 50 }
{ "trace": "chat-mix-v1", "input_tokens": "median 1,024 · p90 4,096", "output_tokens": "median 256 · p90 1,024", "arrival": "Poisson, rate swept to SLO boundary" }
{ "source": "GPU board power sum (NVIDIA)", "kind": "board", "sampling_hz": 1, "window": "120 s steady state" }
{ "suite": "gsm8k-5shot", "threshold_pts": 1 }
2
1
{ "cards": 64 }
[ { "key": "baseline", "label": "vllm-default", "engine": "vLLM 0.31.0 · KV BF16", "mbu_pct": 56.6, "node_power_kw": 0.637, "goodput_tok_s": 4572.3, "ttft_p99_ms": 340, "tpot_p99_ms": 44.6, "slo_pass_count": 2, "repeats": 2, "throttle_counts": { "sw_power_cap": 199 ...
[ "Whole-node power (cloud VM: no BMC access)", "Context lengths beyond the chat-mix-v1 trace", "Quick mode: short windows, few repeats — validation only, not for publishing", "Whole-node power: energy figures are GPU board power only (no CPUs, memory, NICs, fans or PSU losses)" ]
tokenwatt run --spec lambda-qwen3-30b-a3b-fp8-tp1-dp1.spec.yaml --label 'vllm-default' --role baseline --out runs/vllm-default.json tokenwatt run --spec lambda-qwen3-30b-a3b-fp8-tp1-dp1.spec.yaml --label 'vllm-fp8kv' --role tuned --out runs/vllm-fp8kv.json tokenwatt report runs/vllm-default.json runs/vllm-fp8kv.json -...
{ "name": "lambda-qwen3-30b-a3b-fp8-tp1-dp1", "hardware": { "adapter": "nvidia", "rated_bw_tbs_per_gpu": null, "gpus": null, "host": "Lambda Cloud instance" }, "engine": { "endpoint": "http://127.0.0.1:8000/v1", "name": "vLLM", "version": "0.31.0", "kernels": "vllm/vllm-openai:la...

TokenWatt inference reports

Published TokenWatt Bench reports, as shown on tokenwatt.io/reports. Each report gives SLO goodput (the highest request rate meeting p99 TTFT and TPOT targets), tokens per joule, memory-bandwidth utilization and an accuracy gate for each configuration measured. Method: methodology.

  • h100-qwen3-30b-a3b-fp8-vllm-0-31.json — H100 SXM, Qwen3-30B-A3B-FP8, vLLM 0.31.0, full mode: 3,996 output tok/s at 9.5 req/s within SLO
  • lab-h100-qwen3-30b-a3b-kv-cache.json — BF16 vs FP8 KV cache on the same setup (Lab notes #1)
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