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Full Discussion: Cpu usage
Top Forums Programming Cpu usage Post 302262571 by Perderabo on Friday 28th of November 2008 03:11:37 AM
Old 11-28-2008
Your while loop does nothing but compute. It tries to use as much cpu as it can get. Outputing some data and sleeping do not use the cpu. I don't understand why you find any of this confusing.

As for avoiding cpu usage, you actually show two ways to do this. I don't understand why you then pose the question.

But there is nothing wrong with using the cpu if that is what your program needs to do. It's the kernel's job to ensure that all processes are allowed to run. The kernel will limit your process' cpu usage as it needs to. In general, a cpu bound process can hog the cpu for a few seconds, but its priority will be worsened as a result. It soon will have to least priority of any process and will find itself running only when the kernel can't find anything else to do.

At most, the only thing you need to do is to consider adding a nice() call like this:
nice(5);
This is a clue to the kernel to lower your process' priority.
 

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Getopt::Long::Descriptive::Usage(3)			User Contributed Perl Documentation		       Getopt::Long::Descriptive::Usage(3)

NAME
Getopt::Long::Descriptive::Usage - the usage description for GLD VERSION
version 0.096 SYNOPSIS
use Getopt::Long::Descriptive; my ($opt, $usage) = describe_options( ... ); $usage->text; # complete usage message $usage->die; # die with usage message DESCRIPTION
This document only describes the methods of the Usage object. For information on how to use Getopt::Long::Descriptive, consult its documentation. METHODS
new my $usage = Getopt::Long::Descriptive::Usage->new(\%arg); You really don't need to call this. GLD will do it for you. Valid arguments are: options - an arrayref of options leader_text - the text that leads the usage; this may go away! text This returns the full text of the usage message. leader_text This returns the text that comes at the beginning of the usage message. option_text This returns the text describing the available options. warn This warns with the usage message. die This throws the usage message as an exception. $usage_obj->die(\%arg); Some arguments can be provided pre_text - text to be prepended to the usage message post_text - text to be appended to the usage message The "pre_text" and "post_text" arguments are concatenated with the usage message with no line breaks, so supply this if you need them. AUTHORS
o Hans Dieter Pearcey <hdp@cpan.org> o Ricardo Signes <rjbs@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2005 by Hans Dieter Pearcey. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.18.2 2013-10-04 Getopt::Long::Descriptive::Usage(3)
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