### What this PR does / why we need it? When running DP in a non-equilibrium scenario, which means there is some dp groups executing `dummy_run`, we need to make sure it running the same mode as other dp, thus improving then performance in dp scenario ### How was this patch tested? Tested by adding log in `_dummy_run` - vLLM version: v0.10.2 - vLLM main: https://github.com/vllm-project/vllm/commit/releases/v0.11.0 --------- Signed-off-by: MengqingCao <cmq0113@163.com>