Development Team/Profiling

From Sugar Labs
< Development Team
Revision as of 21:33, 23 February 2010 by Patrol (talk | contribs) (moved Walter is a wanker 12/Profiling to Development Team/Profiling over redirect: revert)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search


Memory

ps_mem

Try to determine how much RAM is currently being used per program. The shared RAM is problematic to calculate, and this script automatically selects the most accurate method available for your kernel.

original script at http://www.pixelbeat.org/scripts/ps_mem.py

The following patch makes the script output the processes pids and cmd-lines instead of their names when possible.

__patched__ version at http://dev.laptop.org/~rlucchese/utils/ps_mem.py
patch:
--- ps_mem.py.orig	2008-08-29 09:30:29.000000000 +0200
+++ ps_mem	2008-08-29 09:43:49.000000000 +0200
@@ -117,17 +117,23 @@
     return (Private, Shared)
 
 def getCmdName(pid):
-    cmd = file("/proc/%d/status" % pid).readline()[6:-1]
-    exe = os.path.basename(os.path.realpath("/proc/%d/exe" % pid))
-    if exe.startswith(cmd):
-        cmd=exe #show non truncated version
-        #Note because we show the non truncated name
-        #one can have separated programs as follows:
-        #584.0 KiB +   1.0 MiB =   1.6 MiB    mozilla-thunder (exe -> bash)
-        # 56.0 MiB +  22.2 MiB =  78.2 MiB    mozilla-thunderbird-bin
+    cmd = file("/proc/%d/cmdline" % pid).readline()
+    if len(cmd):
+       # cmdline has a bogus format
+       cmd_temp = ''
+       for i in range(0,len(cmd) -1):
+           if ord(cmd[i])<ord(' ') or ord(cmd[i])>ord('~'):
+               cmd_temp += ' '
+           else:
+               cmd_temp += cmd[i]
+
+       cmd = cmd_temp
+    else:
+        cmd = file("/proc/%d/status" % pid).readline()[6:-1]
     return cmd
 
 cmds={}
+pids={}
 shareds={}
 count={}
 for pid in os.listdir("/proc/"):
@@ -155,10 +161,8 @@
     else:
         shareds[cmd]=shared
     cmds[cmd]=cmds.setdefault(cmd,0)+private
-    if count.has_key(cmd):
-       count[cmd] += 1
-    else:
-       count[cmd] = 1
+
+    pids[cmd] = pid
 
 #Add shared mem for each program
 total=0
@@ -185,16 +189,16 @@
     else:
        return cmd
 
-print " Private  +   Shared  =  RAM used\tProgram \n"
+print " Private  +   Shared  =  RAM used\tPID\tProgram \n"
 for cmd in sort_list:
-    print "%8sB + %8sB = %8sB\t%s" % (human(cmd[1]-shareds[cmd[0]]),
+    print "%8sB + %8sB = %8sB\t%d\t%s" % (human(cmd[1]-shareds[cmd[0]]),
                                       human(shareds[cmd[0]]), human(cmd[1]),
-                                      cmd_with_count(cmd[0], count[cmd[0]]))
+                                      pids[cmd[0]], cmd[0])
 if have_pss:
     print "-" * 33
     print " " * 24 + "%8sB" % human(total)
     print "=" * 33
-print "\n Private  +   Shared  =  RAM used\tProgram \n"
+print " Private  +   Shared  =  RAM used\tPID\tProgram \n"
 
 #Warn of possible inaccuracies
 #2 = accurate & can total