I'd like to be able to run a Perl script to watch a machine's processes. That led me to PerfLib.pm, so I obtained PerfLib.pm from CPAN and tried to get the example listed in Getting a Local/Remote Win32 Task List but have been unsuccessful in getting it to work.

Next I tried the example in the POD: 

#!/usr/bin/perl -w

# use strict;

{
  use Win32::PerfLib;
  my $server = "";
  Win32::PerfLib::GetCounterNames($server, \%counter);
  %r_counter = map { $counter{$_} => $_ } keys %counter;
  # retrieve the id for process object
  $process_obj = $r_counter{Process};
  # retrieve the id for the process ID counter
  $process_id = $r_counter{'ID Process'};

  # create connection to $server
  $perflib = new Win32::PerfLib($server);
  $proc_ref = {};
  # get the performance data for the process object
  $perflib->GetObjectList($process_obj, $proc_ref);
  $perflib->Close();
  $instance_ref = $proc_ref->{Objects}->{$process_obj}->{Instances};
  foreach $p (sort keys %{$instance_ref})
  {
      $counter_ref = $instance_ref->{$p}->{Counters};
      foreach $i (keys %{$counter_ref})
      {
      if($counter_ref->{$i}->{CounterNameTitleIndex} == $process_id)
      {
          printf( "% 6d %s\n", $counter_ref->{$i}->{Counter},
              $instance_ref->{$p}->{Name}
            );
      }
      }
  }
}

[download]
The result was 
Use of uninitialized value in subroutine entry at C:/Perl/site/lib/Win
+32/PerfLib.pm line 199.
Use of uninitialized value in hash element at winps2.pl line 21.
Use of uninitialized value in hash element at winps2.pl line 21.
        (in cleanup) Error closing handle!

[download]
Without wanting to spend too much time debugging the wheel, amd I doing anything obviouisly wrong here? If not, I'll hack away at it.

--t. alex
but my friends call me T.

In reply to Has anyone here used PerfLib.pm successfully? by talexb

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.