add ValueError for max-seconds is too low

[tukwila]

Summary

fix bug: #115

error print refer to:

Traceback (most recent call last):
  File "/Users/guangli.bao/go/guidellm/src/guidellm/benchmark/profile.py", line 318, in next_strategy
    raise ValueError(
ValueError: Rate array contains zero values, which may cause division by zero or invalid calculations.
Debug info: {'min_rate': 0.0, 'max_rate': 0.0, 'sweep_size': 10, 'generated_rates': [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0], 'zero_count': np.int64(8), 'zero_positions': [0, 1, 2, 3, 4, 5, 6, 7]}
Please adjust parameter range to avoid zero values.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/guangli.bao/miniforge3/envs/myenv/bin/guidellm", line 8, in <module>
    sys.exit(cli())
             ^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/site-packages/click/core.py", line 1161, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/site-packages/click/core.py", line 1082, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/site-packages/click/core.py", line 1697, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/site-packages/click/core.py", line 1697, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/site-packages/click/core.py", line 1443, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/site-packages/click/core.py", line 788, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/go/guidellm/src/guidellm/__main__.py", line 314, in run
    asyncio.run(
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/asyncio/runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/miniforge3/envs/myenv/lib/python3.11/asyncio/base_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/go/guidellm/src/guidellm/benchmark/entrypoints.py", line 29, in benchmark_with_scenario
    return await benchmark_generative_text(**vars(scenario), **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/go/guidellm/src/guidellm/benchmark/entrypoints.py", line 118, in benchmark_generative_text
    async for result in benchmarker.run(
  File "/Users/guangli.bao/go/guidellm/src/guidellm/benchmark/benchmarker.py", line 185, in run
    while scheduling_strategy := profile.next_strategy():
                                 ^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/guangli.bao/go/guidellm/src/guidellm/benchmark/profile.py", line 325, in next_strategy
    raise ValueError("Unable to generate valid rates parameters. Please check your input range.") from e
ValueError: Unable to generate valid rates parameters. Please check your input range.
╭─ Benchmarks ───────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ [14:26:… 1… synchronous (comple… Req:    0.0 req/s,    0.00s Lat,     0.0 Conc,       0 Comp,        1 Inc,        0 … │
│                                  Tok:    0.0 gen/s,    0.0 tot/s,   0.0ms TTFT,    0.0ms ITL,     0 Prompt,        0 … │
│ [14:26:… 1… throughput  (comple… Req:    0.0 req/s,    0.00s Lat,     0.0 Conc,       0 Comp,        1 Inc,        0 … │
│                                  Tok:    0.0 gen/s,    0.0 tot/s,   0.0ms TTFT,    0.0ms ITL,     0 Prompt,        0 … │
│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
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│ [--:--:…    constant@#… (pendin…                                                                                       │
│                                                                                                                        │
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
Generating... ━━━━━━━━━━━━━━━╸━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ (2/10) [ 0:00:15 < 0:01:00 ]

Details

• [ ]

Test Plan

guidellm benchmark
--target "https://chat.d.run//"
--model "public/qwen2.5-72b-awq"
--processor "/Users/guangli.bao/temp/Qwen3-0.6B"
--rate-type sweep
--max-seconds 1
--max-requests 1
--data "prompt_tokens=128,output_tokens=56"

Related Issues

• Resolves # Sweep mode with --max-seconds fails ungracefully if calculated RPS is too low #115

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• "I certify that all code in this PR is my own, except as noted below."

Use of AI

• Includes AI-assisted code completion
• Includes code generated by an AI application
• Includes AI-generated tests (NOTE: AI written tests should have a docstring that includes ## WRITTEN BY AI ##)

[markurtz]

Thanks for your contribution @tukwila, could you take a look at the refactor branch and adapt this on top of it? Looks great to include there! #351