PciePlugin and DeviceEnumerationPlugin enhancements.

nodescraper/plugins/inband/device_enumeration/device_enumeration_collector.py

@@ -38,7 +38,11 @@ class DeviceEnumerationCollector(InBandDataCollector[DeviceEnumerationDataModel,
 
     DATA_MODEL = DeviceEnumerationDataModel
 
-    CMD_GPU_COUNT_LINUX = "lspci -d {vendorid_ep}: | grep -i 'VGA\\|Display\\|3D' | wc -l"
+    CMD_GPU_COUNT_LINUX = (
+        "lspci -d {vendorid_ep}: | grep -iE "
+        "'VGA|Display|3D|Processing accelerators|Co-processor|Accelerator' | "
+        "grep -vi 'Virtual Function' | wc -l"
+    )
     CMD_VF_COUNT_LINUX = "lspci -d {vendorid_ep}: | grep -i 'Virtual Function' | wc -l"
     CMD_LSCPU_LINUX = "lscpu"
     CMD_LSHW_LINUX = "lshw"

nodescraper/plugins/inband/pcie/pcie_analyzer.py

@@ -53,6 +53,9 @@
 
 T_CAP = TypeVar("T_CAP", bound=PcieCapStructure)
 
+_AMD_PCIE_BRIDGE_DEVICE_IDS = frozenset({0x1500, 0x1501})
+_PCI_BASE_CLASS_BRIDGE = 0x06
+
 
 class PcieAnalyzerInputModel(BaseModel):
     """
@@ -870,6 +873,20 @@ def filter_pcie_data_by_device_id(
                 new_cfg_space_dict[bdf] = pcie_data
         return new_cfg_space_dict
 
+    @staticmethod
+    def _is_amd_gpu_pcie_endpoint(cfg_space: PcieCfgSpace, vendorid_ep: int) -> bool:
+        """True if this config space is an AMD GPU/accelerator endpoint, not a bridge."""
+        t0 = cfg_space.type_0_configuration
+        if t0.vendor_id.val != vendorid_ep:
+            return False
+        device_id = t0.device_id.val
+        if device_id in _AMD_PCIE_BRIDGE_DEVICE_IDS:
+            return False
+        base_class = t0.class_code.val
+        if base_class == _PCI_BASE_CLASS_BRIDGE:
+            return False
+        return True
+
     def check_gpu_count(
         self,
         pcie_data: PcieDataModel,
@@ -888,10 +905,15 @@ def check_gpu_count(
             return
 
         gpu_count_from_pcie = 0
+        bridge_count = 0
         for cfg_space in pcie_data.pcie_cfg_space.values():
-            vendor_id = cfg_space.type_0_configuration.vendor_id.val
-            if vendor_id == self.system_info.vendorid_ep:
+            t0 = cfg_space.type_0_configuration
+            if t0.vendor_id.val != self.system_info.vendorid_ep:
+                continue
+            if self._is_amd_gpu_pcie_endpoint(cfg_space, self.system_info.vendorid_ep):
                 gpu_count_from_pcie += 1
+            else:
+                bridge_count += 1
 
         if gpu_count_from_pcie != expected_gpu_count:
             self._log_event(
@@ -900,6 +922,7 @@ def check_gpu_count(
                 priority=EventPriority.ERROR,
                 data={
                     "gpu_count_from_pcie": gpu_count_from_pcie,
+                    "amd_pcie_bridge_count_excluded": bridge_count,
                     "expected_gpu_count": expected_gpu_count,
                 },
             )
@@ -910,6 +933,7 @@ def check_gpu_count(
                 priority=EventPriority.INFO,
                 data={
                     "gpu_count": gpu_count_from_pcie,
+                    "amd_pcie_bridge_count_excluded": bridge_count,
                 },
             )
 

test/unit/plugin/test_device_enumeration_collector.py

@@ -66,7 +66,11 @@ def test_collect_linux(system_info, device_enumeration_collector):
                 exit_code=0,
                 stdout="8",
                 stderr="",
-                command="lspci -d 1002: | grep -i 'VGA\\|Display\\|3D' | wc -l",
+                command=(
+                    "lspci -d 1002: | grep -iE "
+                    "'VGA|Display|3D|Processing accelerators|Co-processor|Accelerator' | "
+                    "grep -vi 'Virtual Function' | wc -l"
+                ),
             ),
             MagicMock(
                 exit_code=0,
@@ -142,7 +146,11 @@ def test_collect_error(system_info, device_enumeration_collector):
                 exit_code=1,
                 stdout="some output",
                 stderr="command failed",
-                command="lspci -d 1002: | grep -i 'VGA\\|Display\\|3D' | wc -l",
+                command=(
+                    "lspci -d 1002: | grep -iE "
+                    "'VGA|Display|3D|Processing accelerators|Co-processor|Accelerator' | "
+                    "grep -vi 'Virtual Function' | wc -l"
+                ),
             ),
             MagicMock(
                 exit_code=1,