[Bugfix] Fixing bug inside MultiModalProfiler

[shenoyvvarun]

Cherry pick
vllm-project/vllm#21798
vllm-project/vllm#21842

[github-actions]

👋 Hi! Thank you for contributing to the vLLM project.

💬 Join our developer Slack at https://slack.vllm.ai to discuss your PR in #pr-reviews, coordinate on features in #feat- channels, or join special interest groups in #sig- channels.

Just a reminder: PRs would not trigger full CI run by default. Instead, it would only run fastcheck CI which starts running only a small and essential subset of CI tests to quickly catch errors. You can run other CI tests on top of those by going to your fastcheck build on Buildkite UI (linked in the PR checks section) and unblock them. If you do not have permission to unblock, ping simon-mo or khluu to add you in our Buildkite org.

Once the PR is approved and ready to go, your PR reviewer(s) can run CI to test the changes comprehensively before merging.

To run CI, PR reviewers can either: Add ready label to the PR or enable auto-merge.

🚀

[gemini-code-assist]

Code Review

This pull request addresses a bug in the MultiModalProfiler where the token budget for multimodal inputs was underestimated, potentially causing requests with large images to hang. The fix correctly calculates the token budget by considering the total length of multimodal placeholders, including bookkeeping tokens, instead of only counting embeddable tokens.

The changes are logical and directly address the issue described. A comprehensive new test for the mllama4 model has been added, which validates the fix by comparing the profiler's output against a manually calculated token count. The supporting changes in the model registry are appropriate.

[CatherineSue]

What is the comment in the vLLM PR about? vllm-project/vllm#21842 (comment)

[YouNeedCryDear]

What is the comment in the vLLM PR about? vllm-project/vllm#21842 (comment)

This one I think vllm-project/vllm#21798 (review)

[upfixer]

vllm-project/vllm#21798 (review)
since that pr is merged, cherry-pick that and add tests?

[shenoyvvarun]

What is the comment in the vLLM PR about? vllm-project/vllm#21842 (comment)
This about the other PR referenced.

vllm-project/vllm#21798 (review) since Both PR is merged. I added cherry picks