[BugFix] Don't change title of top-level process (#22032)

Signed-off-by: Nick Hill <nhill@redhat.com>

vllm/entrypoints/cli/serve.py

@@ -18,7 +18,8 @@ from vllm.entrypoints.utils import (VLLM_SUBCMD_PARSER_EPILOG,
                                     show_filtered_argument_or_group_from_help)
 from vllm.logger import init_logger
 from vllm.usage.usage_lib import UsageContext
-from vllm.utils import FlexibleArgumentParser, decorate_logs, get_tcp_uri
+from vllm.utils import (FlexibleArgumentParser, decorate_logs, get_tcp_uri,
+                        set_process_title)
 from vllm.v1.engine.core import EngineCoreProc
 from vllm.v1.engine.utils import CoreEngineProcManager, launch_core_engines
 from vllm.v1.executor.abstract import Executor
@@ -74,7 +75,7 @@ def run_headless(args: argparse.Namespace):
 
     if args.api_server_count > 1:
         raise ValueError("api_server_count can't be set in headless mode")
-    # set_process_title("Headless_ProcManager")
+
     # Create the EngineConfig.
     engine_args = vllm.AsyncEngineArgs.from_cli_args(args)
     usage_context = UsageContext.OPENAI_API_SERVER
@@ -139,8 +140,6 @@ def run_multi_api_server(args: argparse.Namespace):
 
     orig_disable_mm_preprocessor_cache = args.disable_mm_preprocessor_cache
 
-    # set_process_title("ProcManager")
-
     if num_api_servers > 1:
         setup_multiprocess_prometheus()
 
@@ -225,7 +224,9 @@ def run_api_server_worker_proc(listen_address,
                                **uvicorn_kwargs) -> None:
     """Entrypoint for individual API server worker processes."""
 
-    # Add process-specific prefix to stdout and stderr.
+    # Set process title and add process-specific prefix to stdout and stderr.
+    server_index = client_config.get("client_index", 0) if client_config else 0
+    set_process_title("APIServer", str(server_index))
     decorate_logs()
 
     uvloop.run(

vllm/entrypoints/openai/api_server.py

@@ -102,7 +102,7 @@ from vllm.transformers_utils.tokenizer import MistralTokenizer
 from vllm.usage.usage_lib import UsageContext
 from vllm.utils import (Device, FlexibleArgumentParser, decorate_logs,
                         get_open_zmq_ipc_path, is_valid_ipv6_address,
-                        set_process_title, set_ulimit)
+                        set_ulimit)
 from vllm.v1.metrics.prometheus import get_prometheus_registry
 from vllm.version import __version__ as VLLM_VERSION
 
@@ -1824,7 +1824,7 @@ async def run_server_worker(listen_address,
         ToolParserManager.import_tool_parser(args.tool_parser_plugin)
 
     server_index = client_config.get("client_index", 0) if client_config else 0
-    set_process_title("APIServer", str(server_index))
+
     # Load logging config for uvicorn if specified
     log_config = load_log_config(args.log_config_file)
     if log_config is not None: