xend: Add free memory size of every node in physinfo to help user to

get usage of memory of their NUMA machine.

Signed-off-by: Duan Ronghui <ronghui.duan@intel.com>

tools/python/xen/lowlevel/xc/xc.c

@@ -764,7 +764,8 @@ static PyObject *pyxc_physinfo(XcObject *self)
     xc_physinfo_t info;
     char cpu_cap[128], *p=cpu_cap, *q=cpu_cap;
     int i, j, max_cpu_id;
-    PyObject *ret_obj, *node_to_cpu_obj;
+    uint64_t free_heap;
+    PyObject *ret_obj, *node_to_cpu_obj, *node_to_memory_obj;
     xc_cpu_to_node_t map[MAX_CPU_ID + 1];
 
     set_xen_guest_handle(info.cpu_to_node, map);
@@ -812,7 +813,17 @@ static PyObject *pyxc_physinfo(XcObject *self)
         PyList_Append(node_to_cpu_obj, cpus); 
     }
 
+    node_to_memory_obj = PyList_New(0);
+
+    for ( i = 0; i < info.nr_nodes; i++ )
+    {
+	xc_availheap(self->xc_handle, 0, 0, i, &free_heap);
+	PyList_Append(node_to_memory_obj,
+	    PyInt_FromLong(free_heap / 1024));
+    }
+	
     PyDict_SetItemString(ret_obj, "node_to_cpu", node_to_cpu_obj);
+    PyDict_SetItemString(ret_obj, "node_to_memory", node_to_memory_obj);
  
     return ret_obj;
 #undef MAX_CPU_ID

tools/python/xen/xend/XendNode.py

@@ -573,6 +573,20 @@ class XendNode:
         except:
             str='none\n'
         return str[:-1];
+    def format_node_to_memory(self, pinfo):
+        str=''
+        whitespace=''
+        try:
+            node_to_memory=pinfo['node_to_memory']
+            for i in range(0, pinfo['nr_nodes']):
+                str+='%snode%d:%d\n' % (whitespace,
+                                        i,
+                                        node_to_memory[i] / 1024)
+                whitespace='%25s' % ''
+        except:
+            str='none\n'
+        return str[:-1];
+
 
     def physinfo(self):
         info = self.xc.physinfo()
@@ -583,6 +597,7 @@ class XendNode:
         info['total_memory'] = info['total_memory'] / 1024
         info['free_memory']  = info['free_memory'] / 1024
         info['node_to_cpu']  = self.format_node_to_cpu(info)
+        info['node_to_memory'] = self.format_node_to_memory(info)
 
         ITEM_ORDER = ['nr_cpus',
                       'nr_nodes',
@@ -592,7 +607,8 @@ class XendNode:
                       'hw_caps',
                       'total_memory',
                       'free_memory',
-                      'node_to_cpu'
+                      'node_to_cpu',
+                      'node_to_memory'
                       ]
 
         return [[k, info[k]] for k in ITEM_ORDER]