[ROCm] Implement GPU-to-NUMA-node detection (#40015)

Signed-off-by: Patrick Schlangen <pschlan@amd.com>
Co-authored-by: TJian <tunjian.tan@embeddedllm.com>

docs/configuration/optimization.md

@@ -155,9 +155,9 @@ switch to `--physcpubind=<cpu-list> --membind=<node>`.
 
 These `--numa-bind*` options only apply to GPU execution processes. They do not
 configure the CPU backend's separate thread-affinity controls. Automatic
-GPU-to-NUMA detection is currently implemented for CUDA/NVML-based platforms;
-other GPU backends must provide explicit binding lists if they use these
-options.
+GPU-to-NUMA detection is currently implemented for CUDA/NVML-based as well as
+ROCM-based platforms; other GPU backends must provide explicit binding lists if
+they use these options.
 
 `--numa-bind-nodes` takes one non-negative NUMA node index per visible GPU, in
 the same order as the GPU indices.

vllm/platforms/rocm.py

@@ -33,6 +33,7 @@ try:
         amdsmi_init,
         amdsmi_shut_down,
         amdsmi_topo_get_link_type,
+        amdsmi_topo_get_numa_node_number,
     )
 except ImportError as e:
     logger.warning("Failed to import from amdsmi with %r", e)
@@ -955,3 +956,30 @@ class RocmPlatform(Platform):
             rms_norm = default
 
         return IrOpPriorityConfig.with_default(default, rms_norm=rms_norm)
+
+    @classmethod
+    @with_amdsmi_context
+    def get_all_device_numa_nodes(cls) -> list[int] | None:
+        """Get NUMA nodes for all visible GPU devices."""
+        try:
+            handles = amdsmi_get_processor_handles()
+            numa_nodes = []
+            for device_id in range(cls.device_count()):
+                physical_device_id = cls.device_id_to_physical_device_id(device_id)
+                try:
+                    numa_node = amdsmi_topo_get_numa_node_number(
+                        handles[physical_device_id]
+                    )
+                except AmdSmiException as e:
+                    logger.warning(
+                        "Could not detect NUMA node for GPU %d, "
+                        "disabling automatic NUMA binding: %s",
+                        device_id,
+                        e,
+                    )
+                    return None
+                numa_nodes.append(numa_node)
+            return numa_nodes
+        except Exception as e:
+            logger.warning("Failed to get NUMA nodes for GPUs: %s", e)
+            return None