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[Feature] default --extra-body param to disable thinking in vllm bench serve #26784

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Merged
DarkLight1337 merged 5 commits into from
Oct 15, 2025
Merged

[Feature] default --extra-body param to disable thinking in vllm bench serve #26784

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0fc8388
[Feature] default disable thinking in vllm bench serve
lengrongfu Oct 14, 2025
500bc66
add --extra-body pararm to cli
lengrongfu Oct 14, 2025
d4c9ecd
still call this sampling_params
lengrongfu Oct 14, 2025
12ceb67
still call this sampling_params
lengrongfu Oct 14, 2025
47be117
Merge branch 'main' into feat/opt-bench
chaunceyjiang Oct 15, 2025
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14 changes: 13 additions & 1 deletion vllm/benchmarks/serve.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1230,6 +1230,15 @@ def add_cli_args(parser: argparse.ArgumentParser):
"the ready check will be skipped.",
)

parser.add_argument(
"--extra-body",
help="A JSON string representing extra body parameters to include "
"in each request."
'Example: \'{"chat_template_kwargs":{"enable_thinking":false}}\'',
type=json.loads,
default=None,
)


def main(args: argparse.Namespace) -> dict[str, Any]:
return asyncio.run(main_async(args))
Expand Down Expand Up @@ -1330,6 +1339,9 @@ async def main_async(args: argparse.Namespace) -> dict[str, Any]:
else:
sampling_params = {}

extra_body = args.extra_body or {}
extra_body = {**sampling_params, **extra_body}

# Avoid GC processing "static" data - reduce pause times.
gc.collect()
gc.freeze()
Expand All @@ -1355,7 +1367,7 @@ async def main_async(args: argparse.Namespace) -> dict[str, Any]:
max_concurrency=args.max_concurrency,
lora_modules=args.lora_modules,
extra_headers=headers,
extra_body=sampling_params,
extra_body=extra_body,
ramp_up_strategy=args.ramp_up_strategy,
ramp_up_start_rps=args.ramp_up_start_rps,
ramp_up_end_rps=args.ramp_up_end_rps,
Expand Down