Issue: our parser is using 100% CPU once run on a machine, till it finishes its processing. Now I have to increase the efficiency and I have came up with two solutions:

Instead of reading one line at a time from the log file, I want to read a block and keep it in memory (lets say 10 kb) , However we are facing some problem then how our parser will react as it read file line by line instead of chunk of file and in this case how will I parse our log file.

Perl has a Win32 package. How can I use this package to reduce the CPU usage as I got the following line of code but I am unable to use it.

As it gives cpu time always 0. I am working on windows platform: (I think we have the problem in red as it may be for linux then how can I use this code for windows.)

Link of code is: resource control: CPU 

CPU_start(); CPU_max(30) while 1;
 

 

use Time::HiRes qw(time);
 
sub CPU_used {
    (map {$_->[13]+$_->[14]} 
        [split " ", Cat("/proc/self/stat")])[0]
}
 
{ my %start = (tm => 0, cpu => 0);
sub CPU_start { @start{"tm","cpu"} = (time(),CPU_used()) }
sub CPU_max {
    my ($max, $real, $cpu) = ($_[0], time()-$start{tm},
        CPU_used()-$start{cpu});
    return unless defined($max) and $max > 0;
    &sleep( $cpu/$max-$real );
}}
 
#
# macro used from CPU_used() and CPU_max()
#
 
sub sleep { select undef,undef,undef,$_[0] }
sub Cat {
    local *F;
    open F, "< ".$_[0] or return;
    local $/ unless wantarray;
    return <F>;
}

[download]
Seeking a great help from your side. Please do it as soon as because it is very urgent for me.

Thanks

Chatanya Agrawal

20050224 Edit by ysth: code and p tags; id://-ify link

In reply to CPU utilization by contact_chatan

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.