Add warning for unrestricted latency benchmarks

[Pritiks23]

Summary

Adds a warning when neither --num_requests nor --duration is specified. The warning states that the full dataset will run and recommends setting an explicit limit.

Dev Engineer Review

• The warning applies only when both benchmark limits are unset.
• The change does not alter public APIs or benchmark behavior.
• Python syntax validation passed.
• No configuration or test-list files changed.

QA Engineer Review

No test changes.

Description

Test Coverage

PR Checklist

Please review the following before submitting your PR:

• PR description clearly explains what and why. If using CodeRabbit's summary, please make sure it makes sense.

• PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

• Test cases are provided for new code paths (see test instructions)

• If PR introduces API changes, an appropriate PR label is added - either api-compatible or api-breaking. For api-breaking, include BREAKING in the PR title.

• Any new dependencies have been scanned for license and vulnerabilities

• CODEOWNERS updated if ownership changes

• Documentation updated as needed

• Update tava architecture diagram if there is a significant design change in PR.

• The reviewers assigned automatically/manually are appropriate for the PR.

• [ X] Please check this after reviewing the above items as appropriate for this PR.

GitHub Bot Help

To see a list of available CI bot commands, please comment /bot help.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 11647e49-e6c8-429d-ac2b-876498703f3f

📥 Commits

Reviewing files that changed from the base of the PR and between 4b69c59 and 9e8766e.

📒 Files selected for processing (1)

• tensorrt_llm/bench/benchmark/low_latency.py

---

Walkthrough

The low-latency benchmark now warns when neither num_requests nor duration limits execution. The warning states that the full dataset will be processed and suggests using either limit.

Changes

Benchmark warning

Layer / File(s)	Summary
Warn on unlimited runs tensorrt_llm/bench/benchmark/low_latency.py	After CLI options are parsed, the benchmark warns when num_requests is nonpositive and duration is not provided.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: bowenfu

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a warning for unrestricted latency benchmarks.
Description check	✅ Passed	The description explains the problem and solution, documents syntax validation, and includes the required checklist.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands.}