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@mgoin mgoin commented Aug 15, 2025

Purpose

We mostly use lm-eval as a way to run gsm8k evaluations for end-to-end accuracy testing, but gsm8k is a simple eval that you can replicate in ~100 lines of code so I think we should implement a close approximation of it that focuses on performance and ease of use for server benchmarking.

This PR focuses on just replacing the LLM class test with a faster vllm serve-based test for accuracy without streaming, but in the future we can repurpose this script to do streaming and measure fine-grained performance alongside accuracy.

Test Plan

See if LM Eval Small Models job is green and hopefully faster than before

Test Result

Job time reduced from 36min to 18min!

(Optional) Documentation Update


Essential Elements of an Effective PR Description Checklist
  • The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
  • The test plan, such as providing test command.
  • The test results, such as pasting the results comparison before and after, or e2e results
  • (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.

Signed-off-by: mgoin <mgoin64@gmail.com>
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@mergify mergify bot added the ci/build label Aug 15, 2025
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Code Review

This pull request replaces the lm-eval based gsm8k tests with a custom, faster implementation. The changes include a new evaluation script, pytest integration, and model configurations. My review focuses on correctness and stability. I've identified a race condition in the file download logic and a potential resource exhaustion issue due to an unsafe default for parallel requests. Both are high-severity issues that should be addressed to ensure the new test is robust and reliable.

mgoin added 2 commits August 15, 2025 19:20
Signed-off-by: mgoin <mgoin64@gmail.com>
Signed-off-by: mgoin <mgoin64@gmail.com>
@mgoin mgoin added the ready ONLY add when PR is ready to merge/full CI is needed label Aug 15, 2025
@simon-mo simon-mo merged commit 0f4f019 into vllm-project:main Aug 19, 2025
69 of 71 checks passed
@mgoin mgoin deleted the new-gsm8k-eval branch August 19, 2025 22:12
@robertgshaw2-redhat
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can we make this do streaming in a follow up @mgoin ?

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mgoin commented Aug 19, 2025

@robertgshaw2-redhat yes, that is my plan to also make this a benchmark util

This PR focuses on just replacing the LLM class test with a faster vllm serve-based test for accuracy without streaming, but in the future we can repurpose this script to do streaming and measure fine-grained performance alongside accuracy.

princepride pushed a commit to princepride/vllm that referenced this pull request Aug 20, 2025
divakar-amd pushed a commit to divakar-amd/vllm_upstream that referenced this pull request Aug 20, 2025
cyang49 pushed a commit to cyang49/vllm that referenced this pull request Aug 20, 2025
djmmoss pushed a commit to djmmoss/vllm that referenced this pull request Aug 21, 2025
…lm-project#23002)

Signed-off-by: mgoin <mgoin64@gmail.com>
Signed-off-by: Duncan Moss <djm.moss@gmail.com>
epwalsh pushed a commit to epwalsh/vllm that referenced this pull request Aug 28, 2025
xiao-llm pushed a commit to xiao-llm/vllm that referenced this pull request Aug 28, 2025
…lm-project#23002)

Signed-off-by: mgoin <mgoin64@gmail.com>
Signed-off-by: Xiao Yu <xiao.yu@amd.com>
zhewenl pushed a commit to zhewenl/vllm that referenced this pull request Aug 28, 2025
mengxingkongzhouhan pushed a commit to mengxingkongzhouhan/vllm that referenced this pull request Aug 30, 2025
zhewenl pushed a commit to zhewenl/vllm that referenced this pull request Sep 3, 2025
FeiDaLI pushed a commit to FeiDaLI/vllm that referenced this pull request Sep 25, 2025
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3 participants