Bug 420518 - [multicore] Refresh speed - /proc/stat file is being fetched twice
Summary: [multicore] Refresh speed - /proc/stat file is being fetched twice
Status: CLOSED INVALID
Alias: None
Product: CDT
Classification: Tools
Component: cdt-debug-dsf-gdb (show other bugs)
Version: 8.2.1   Edit
Hardware: PC Linux
: P3 enhancement (vote)
Target Milestone: ---   Edit
Assignee: Project Inbox CLA
QA Contact: Marc Khouzam CLA
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-10-28 11:30 EDT by Alvaro Sanchez-Leon CLA
Modified: 2014-09-10 14:09 EDT (History)
4 users (show)

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Description Alvaro Sanchez-Leon CLA 2013-10-28 11:30:42 EDT 

    


    


      



        
          Comment 1
        

        
          Alvaro Sanchez-Leon CLA

        

        
        

        
          2013-10-28 11:33:14 EDT
        

      






While testing Load meters refresh speed it was observed that the 
file: /proc/stat is being loaded twice

note: Enhancement needed

    


    


      



        
          Comment 2
        

        
          Marc Dumais CLA

        

        
        

        
          2014-09-10 14:09:01 EDT
        

      






It's normal to fetch /proc/stat twice for each load measurement sample. The reason is that this file contains counters that reflect different types of load (user, system, IRQ, etc) and that to determine the instantaneous load, one must compare two sets of counters and figure-out what proportion of the counters increase was actual load (vs idle).