[TransferBench] Displaying PCIe Bus ID (#288)

* Adding PCIe BusID per GPU in topology display

tools/TransferBench/TransferBench.cpp

@@ -522,10 +522,12 @@ void DisplayTopology()
   printf("        |");
   for (int j = 0; j < numGpuDevices; j++)
     printf(" GPU %02d |", j);
-  printf("\n");
+  printf(" PCIe Bus ID\n");
   for (int j = 0; j <= numGpuDevices; j++)
     printf("--------+");
-  printf("\n");
+  printf("-------------\n");
+
+  char pciBusId[20];
 
   for (int i = 0; i < numGpuDevices; i++)
   {
@@ -547,7 +549,8 @@ void DisplayTopology()
                hopCount);
       }
     }
-    printf("\n");
+    HIP_CALL(hipDeviceGetPCIBusId(pciBusId, 20, i));
+    printf(" %s\n", pciBusId);
   }
 }