fix: make automatic NUMA binding configurable (#30394)

python/sglang/srt/environ.py

@@ -1053,7 +1053,7 @@ class Envs:
 
     # Numa
     SGLANG_NUMA_BIND_V2 = EnvBool(True)
-    SGLANG_AUTO_NUMA_BIND = EnvBool(False)
+    SGLANG_AUTO_NUMA_BIND = EnvBool(True)
     SGLANG_CRASH_ON_NUMA_BIND_FAILURE = EnvBool(False)
 
     # Metrics

python/sglang/srt/utils/numa_utils.py

@@ -129,6 +129,8 @@ def get_numa_node_if_available(server_args: ServerArgs, gpu_id: int) -> Optional
     """
     if server_args.numa_node is not None:
         return server_args.numa_node[gpu_id]
+    if not envs.SGLANG_AUTO_NUMA_BIND.get():
+        return None
     if _is_numa_available():
         queried_numa_node = _query_numa_node_for_gpu(gpu_id)
         if len(queried_numa_node) == 0: