[Bugfix] Update device name for H200 detection

[robertgshaw2-redhat]

Purpose

• config lookup is broken due to [Model] Use the same fused_moe configs for all H200 devices #23642
• fix it

Test Plan

launch:

VLLM_DISABLE_SHARED_EXPERTS_STREAM=1 VLLM_TORCH_PROFILER_DIR=$(pwd)/profiles VLLM_USE_DEEP_GEMM=0 vllm serve {{MODEL}} --tensor-parallel-size 8 --speculative-config '{"num_speculative_tokens": 1, "method":"deepseek_mtp"}' --no-enable-prefix-caching 

Test Result

result:

(Worker_TP3 pid=1190105) INFO 11-08 16:50:53 [fused_moe.py:876] Using configuration from /home/robertgshaw2-redhat/vllm/vllm/model_executor/layers/fused_moe/configs/E=256,N=256,device_name=NVIDIA_H200,dtype=fp8_w8a8,block_shape=[128,128].json for MoE layer. 

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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.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[gemini-code-assist]

Code Review

This pull request correctly updates the device name for H200 detection to NVIDIA_H200, which aligns with the configuration file naming convention. This is a necessary bugfix. I've also identified a potential issue in the detection logic that could misidentify other GPUs (like GH200) as H200, and I've provided a suggestion to make the check more robust.

[gemini-code-assist]

The current check if "H200" in device_name: is too broad and could incorrectly match other device names that contain "H200", such as "GH200". This could lead to using the wrong configuration for non-H200 devices, potentially causing performance degradation or errors. To make the check more specific to the H200 family, I suggest splitting the device name by underscores and checking for an exact match of "H200".

Suggested change

	if "H200" in device_name:
	device_name = "H200"
	device_name = "NVIDIA_H200"
	if "H200" in device_name.split("_"):
	device_name = "NVIDIA_H200"

[robertgshaw2-redhat]

good bot