DevConsole: New referenced memory usage field in Memphis (introduced in kernel 2.6.22)

services/console/lib/procmem/analysis.py

@@ -7,20 +7,22 @@ class Analysis:
     def __init__(self, pid):
         self.pid = pid
     
-    def DirtyRSS(self):
+    def SMaps(self):
         smaps =    proc_smaps.ProcSmaps(self.pid)
-        dirty = []
+        private_dirty = 0
+        shared_dirty = 0
+        referenced = 0
 
-        private = 0
-        shared = 0
-        
         for map in smaps.mappings:
-            private += map.private_dirty
-            shared  += map.shared_dirty
+            private_dirty += map.private_dirty
+            shared_dirty  += map.shared_dirty
+            referenced += map.referenced
 
-        dirty = {"private": int(private), "shared": int(shared)}
+        smaps = {"private_dirty": int(private_dirty), \
+                    "shared_dirty": int(shared_dirty),\
+                    "referenced": int(referenced)}
 
-        return dirty
+        return smaps
     
     def ApproxRealMemoryUsage(self):
         maps = proc_smaps.ProcMaps(self.pid)

services/console/lib/procmem/proc_smaps.py

@@ -36,7 +36,8 @@ class ProcSmaps:
         # Shared_Dirty:         0 kB
         # Private_Clean:        8 kB
         # Private_Dirty:        0 kB
-    
+        # Referenced:           4 kb -> Introduced in kernel 2.6.22
+
         while num_lines > 0:
             fields = lines[line_idx].split (" ", 5)
             if len (fields) == 6:
@@ -51,13 +52,20 @@ class ProcSmaps:
             shared_dirty  = self.parse_smaps_size_line (lines[line_idx + 4])
             private_clean = self.parse_smaps_size_line (lines[line_idx + 5])
             private_dirty = self.parse_smaps_size_line (lines[line_idx + 6])
+            referenced    = self.parse_smaps_size_line (lines[line_idx + 7])
             name = name.strip ()
 
-            mapping = Mapping (size, rss, shared_clean, shared_dirty, private_clean, private_dirty, permissions, name)
+            mapping = Mapping (size, rss, shared_clean, shared_dirty, \
+                private_clean, private_dirty, referenced, permissions, name)
             self.mappings.append (mapping)
 
             num_lines -= 8
             line_idx += 8
+        
+        self._clear_reference(pid)
+
+    def _clear_reference(self, pid):
+      os.system("echo 1 > /proc/%s/clear_refs" % pid)
 
     # Parses a line of the form "foo: 42 kB" and returns an integer for the "42" field
     def parse_smaps_size_line (self, line):
@@ -66,13 +74,15 @@ class ProcSmaps:
         return int(fields[1])
 
 class Mapping:
-    def __init__ (self, size, rss, shared_clean, shared_dirty, private_clean, private_dirty, permissions, name):
+    def __init__ (self, size, rss, shared_clean, shared_dirty, \
+            private_clean, private_dirty, referenced, permissions, name):
         self.size = size
         self.rss = rss
         self.shared_clean = shared_clean
         self.shared_dirty = shared_dirty
         self.private_clean = private_clean
         self.private_dirty = private_dirty
+        self.referenced  = referenced
         self.permissions = permissions
         self.name = name