New proc get_clk_tck() function to analyse clock granularity

[ais.git] / bin / proc.py

diff --git a/bin/proc.py b/bin/proc.py
index 7f8063f8ada71a3ab73d14329f202155d034994b..6d30bcf800401ba58960b8a67c7da194ca813b77 100644 (file)
--- a/bin/proc.py
+++ b/bin/proc.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import division
+import subprocess
 
 __proc_keys__ = (
     # see man 5 proc
@@ -52,18 +53,25 @@ __proc_keys__ = (
 __states__ = {
     'R': 'running',
     'S': 'sleeping',
-    'D': 'disk sleep',
+    'D': 'waiting disk',
     'Z': 'zombie',
-    'T': 'stoped',
-    'W': 'paging',
+    'T': 'stopped',
+    'W': 'swapping',
 }
 
+def get_clk_tck():
+    process = subprocess.Popen(['getconf', 'CLK_TCK'], shell=True, stdout=subprocess.PIPE)
+    if process.wait() != 0:
+        raise "getconf CLK_TCK failed"
+    return process[0]
+
+    #= 100 -> 1 tick = 1/100 seconds
+    # require libc-bin to be installed
+
 class Stat(dict):
     def __init__(self, processid):
         dict.__init__(self)
-        strstats = file('/proc/%s/stat' % processid).read()
-        # TODO:
-        # "getconf CLK_TCK" = 100 -> 1 tick = 1/100 seconds
+        strstats = open('/proc/%s/stat' % processid).read()
         strstats = strstats.rstrip('\n').split(' ')
         for i, keycls in enumerate(__proc_keys__):
             key, cls = keycls
@@ -77,9 +85,12 @@ class Stat(dict):
         return "%s (%s)" % (state, nice_state)
     
     # TODO: 
-    # "getconf CLK_TCK" = 100 -> 1 tick = 1/100 seconds
+    # subprocess.call(['getconf', 'CLK_TCK']) = 100 -> 1 tick = 1/100 seconds
     def nice_utime(self):
         return self['utime'] / 100
 
     def nice_stime(self):
         return self['stime'] / 100
+
+if __name__ == '__main__':
+    print get_clk_tck()